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00:06:340Michele De Carli: All right, so let's, recap what we have, But we were… Saying yesterday?
00:19:470Michele De Carli: Jane?
00:20:650Michele De Carli: So, then… We were here, okay, so I will not…
00:26:480Michele De Carli: recap the picture of what, I was starting.
00:31:740Michele De Carli: to say, because I think this is the…
00:35:680Michele De Carli: Very important to understand that the…
00:38:520Michele De Carli: the terminal factors of the frames. Okay, so…
00:45:370Michele De Carli: we have lives inside. We have water, growing, okay, which can heat or cover the heat. Let's consider heating line up. As I said yesterday, usually between one pipe and another, if you look in a section, cross-sectional.
01:03:380Michele De Carli: They, okay, you can assume that you have almost negligible flow from one pipe to another, which means that from the conductive point of view, you are…
01:17:270Michele De Carli: You are…
01:22:380Michele De Carli: Okay, doesn't mean… So it means that, basically, from the contacted point of view, okay, you have,
01:33:350Michele De Carli: Yeah, okay. You can consider a section between, halfway between one pipe and the other, and halfway. So that… so, in this case, the… this dimension is the pipe spacing, okay?
01:50:640Michele De Carli: So it means that by… by fixing the temperature.
01:57:420Michele De Carli: In the, in the, in the pipe, okay?
02:02:340Michele De Carli: You have a two-dimensional heat flow, okay, which is particularly relevant close to the pipe, okay, and is becoming almost one-dimensional
02:17:560Michele De Carli: In, when you reach the, top of the…
02:22:580Michele De Carli: surface, and also below the oscillation. Okay, so…
02:29:230Michele De Carli: In this case, you can see that as a result, by…
02:34:660Michele De Carli: For instance, in this case, we have
02:37:450Michele De Carli: This is the line of 39 degrees C, so it might be that here we might have
02:45:310Michele De Carli: 40 or more degrees C, okay, from the water.
02:49:690Michele De Carli: In this case, we can reach 29 degrees C of temperature on the surface, which is the admitted temperature that you can have, so this is the maximum temperature that you can reach.
03:06:160Michele De Carli: And this dates to 99, 100, okay, watts per square meter. Okay, this is the power that can be emitted by the radiant system. On the other side, you have 13 watts per square meter as heat loss.
03:22:470Michele De Carli: Okay, what is this section representing? This section is representing the, the, let's say.
03:33:850Michele De Carli: The section where you get the…
03:36:510Michele De Carli: mean local temperature of the water inside of the pipe, okay? So, this is the representative section, which is leading to the chloride that you have on whole surface, okay? So, it means that this is, let's say, the
03:56:130Michele De Carli: average temperature. I told you that if the temp… if the temperature turns, let's say, He's,
04:07:380Michele De Carli: not the bigger, we can roughly assume that this is the average, okay? So, assuming the average temperature, or the mean logarithmic temperature of the water, okay, is not really to be useful, okay?
04:23:510Michele De Carli: So it means that in this case, roughly speaking, we had 4041 BC as average temperature of the water in the drawer, okay? In the pipes below the floor.
04:38:700Michele De Carli: Which means that if we have… so imagine what this…
04:42:890Michele De Carli: means 42 degrees C as water temperature, and as water temperature.
04:48:60Michele De Carli: If we assume, as I told you yesterday, that the Earth 43 degrees C, for instance, has delta T between supply and water, it means that the supply temperature of the water is 44 degrees C, and the return temperature is 40 degrees.
05:07:260Michele De Carli: Okay?
05:09:340Michele De Carli: Alright, so…
05:12:360Michele De Carli: By having this flow rate, sorry, by having this average temperature, we can have this, this temperature on the, on the result. We have this heat flow. Well, the resulting temperature of 20 nanicity, which is the…
05:30:30Michele De Carli: El negligence.
05:31:650Michele De Carli: So, actually, what do we do? So, when you… if what you… for the ones of you who did the energy course, okay, you know that when you have to set a 2D simulation.
05:45:200Michele De Carli: You have to set the boundaries, conditions.
05:48:230Michele De Carli: Okay, in this case, the boundary conditions are defined at the temperature that you fixed here, okay, so inside the pipe.
05:57:890Michele De Carli: You fix adiabatic condition, which means that you have no heat flow in the horizontal… in a horizontal way in this section here, okay?
06:10:810Michele De Carli: What is it?
06:13:60Michele De Carli: Okay?
06:14:10Michele De Carli: And, so you have… I will highlight in orange.
06:19:960Michele De Carli: Okay, so you have that in this
06:23:610Michele De Carli: on this surface, on this surface, you have no heat flow, okay, so adiabatic conditions here and here, and on the top surface, so on the floor covering surface, and on the sea surface, so…
06:39:930Michele De Carli: Here, in here, okay, I will highlight in… Fire Pool.
06:47:370Michele De Carli: No, in… green.
06:51:150Michele De Carli: Okay, in… Brown, okay?
06:54:320Michele De Carli: here and here.
06:56:990Michele De Carli: You have to, you have to define
07:00:750Michele De Carli: the S boundary condition, the room temperatures.
07:05:800Michele De Carli: Okay, the room temperature that you want to hit, and the room temperature, which is below your slab, okay?
07:17:880Michele De Carli: And the overall industrial coefficient, okay? The overall Plaster coefficient, which is the combination of radiant and conductive heat exchange coefficient, okay?
07:33:190Michele De Carli: In a very simplified way, I mean, as I told you, you usually do not do this kind of simulation.
07:43:490Michele De Carli: So you don't work, you don't…
07:48:440Michele De Carli: You usually are not making simulation, detailed simulation in this case, okay, because it takes too long time.
07:58:310Michele De Carli: So, you… we will see that you have some simplified methods, okay, to estimate the heat flow on, so that carbon.
08:09:450Michele De Carli: Oh my gosh.
08:10:870Michele De Carli: One of these schematics, okay, one of these simplified methods, which is, anyway, complicated, okay.
08:19:160Michele De Carli: But it's good to understand the mechanism of the heat transfer, okay?
08:27:230Michele De Carli: is to consider an equivalent, resistance model, okay? So, in this case, of course, we work in steady-state condition, so we are talking just about pure resistive methods.
08:42:679Michele De Carli: And we can assume that we can simplify the problem by considering, okay, in a proper way.
08:52:850Michele De Carli: the average level, so the axis of our hype, okay, so the… During the lab, on our side.
09:06:320Michele De Carli: And we can assume to have an equivalent bell pressure back together.
09:12:190Michele De Carli: And then we could consider, 1D flow, heat flow, on,
09:18:890Michele De Carli: Above the pipe, and one inflow below the pipe, okay, which is, due to the
09:29:110Michele De Carli: conduction that we have in the screen test, or the concrete layer, and in the finishing material, tiles, wood, whatever you use, okay? So, in this way, we can express, as we know very well, the
09:45:100Michele De Carli: the resistances as sum of thickness divided by the lambda of each layer that we are considering
09:54:920Michele De Carli: for each criteria that we have on the top… on top of our type, and below our type, okay, or something else.
10:04:710Michele De Carli: Okay, the same here.
10:08:140Michele De Carli: Okay?
10:11:50Michele De Carli: And then, of course, what is relevant, what is important, is how to define this equivalent, which means, which is, which is,
10:23:650Michele De Carli: Don't see Deck 3, because I start this one.
10:27:660Michele De Carli: So it's, let's say, taking into account the 2D, okay, heat transfer that you have between the pipe and the, and the equipment layer, the piping.
10:41:530Michele De Carli: Okay.
10:42:900Michele De Carli: Here. Okay, so, basically, we have heat conduction, Inside the day.
10:51:700Michele De Carli: Inside the distractor, And we have convection and radiation in the indoor bath.
11:01:870Michele De Carli: Both on top and big.
11:04:550Michele De Carli: Right.
11:06:10Michele De Carli: Okay?
11:08:310Michele De Carli: Okay, so… If this is clear, Then, we can…
11:15:650Michele De Carli: subdivide the problem into different, let's say, steps, okay?
11:26:230Michele De Carli: So, why? Because, of course, sorry.
11:29:950Michele De Carli: Of course.
11:31:620Michele De Carli: They…
11:33:330Michele De Carli: Since we have a resistance series, okay, since we have a series of resistances, of course, these two sub-systems are related one to another, okay? So, the temperature that I have here, and the heat flow that I have here, is related to the water temperature.
11:51:670Michele De Carli: Sure, so it's not that they are not related, but we can, first look at what happens in the heated food environment.
12:02:590Michele De Carli: And then we will check what happens inside the structures, okay, here. Okay, so what we, we have, we, we have, let's say, or it is relevant, or it is
12:17:90Michele De Carli: useful to subdivide the problem into different steps. So, the first step is to look at the heat transfer between the surface and
12:27:740Michele De Carli: Okay? And the second step is how, based on this temperature that I have, okay.
12:35:760Michele De Carli: what kind of system should I consider?
12:39:60Michele De Carli: Okay? Which is, of course, not important, but that is what…
12:45:920Michele De Carli: So, in order to understand the first, the first problem, okay, so to look at…
12:52:910Michele De Carli: the interaction between the surface and the room, okay? We have to consider the overall transfer, okay?
13:03:580Michele De Carli: And this, I will recap what I told you at almost the beginning of the course, when we started looking at the transfer in the beginning envelope, okay? We made, okay, we…
13:18:530Michele De Carli: We, we discussed about how to define the heat transfer of, between
13:25:850Michele De Carli: inner surface of a water, and… Okay.
13:33:410Michele De Carli: So I will recap again, okay? The heat transfer can be subdivided into radian heat transfer, complexity transfer. If you remember, we can simplify the question of the radial heat transfer by, let's say, leading to,
13:58:490Michele De Carli: leading to an equation, which is something like that. We have the area of our surface, okay, times the
14:07:450Michele De Carli: E transfer coefficient due to radiation, and we can linearize the problem by considering the surface of the considerate margins to the indoor temperatures of the
14:20:430Michele De Carli: Okay? Which is, let's say, the… we can assume to be the average temperature of the… of the other box, okay? Or the new radiant package we can also consider.
14:33:700Michele De Carli: Of course, this is what? This is Premier, this is…
14:43:370Michele De Carli: And this is Kevin, okay? So…
14:48:00Michele De Carli: What we are interested in, okay, is these values width. So, is this figure, which is…
14:57:210Michele De Carli: the heat flux, the value… sorry, the power delivered by the… by the area, so the specific power, in terms of what's structure, which is HR times the temperature difference between the surface and the indoor light.
15:15:490Michele De Carli: Okay?
15:18:20Michele De Carli: So, what we said is that, by considering all this computer simplification and so on, we could consider that this
15:29:700Michele De Carli: because the coefficient can be assumed to be constant, okay?
15:34:960Michele De Carli: And could be assumed to be 5.5 watts per kilometer per second, okay?
15:43:700Michele De Carli: So, whatever is the… whichever is the surface, this is constant. So, the radiant part of the returns of a certain surface, independent on which is the,
15:59:850Michele De Carli: the, the foundation of this, of this surface, okay, either heat, either, floor, ceiling, warm, warmer, cold, and then the, the environment, the radiant heat transfer graphic function is described.
16:18:250Michele De Carli: And then, we have to consider.
16:20:800Michele De Carli: Also, the conductivity transfer coefficient. So, we have
16:25:360Michele De Carli: That the heat which is released, they're all… Okay. Jeez.
16:31:320Michele De Carli: On one hand, contact three.
16:35:200Michele De Carli: And what we are here for the speech updates.
16:39:70Michele De Carli: And of course, we are… we… we… we have to consider the combination, okay, of these two… of these two transfer phenomena, and by considering
16:51:160Michele De Carli: By considering, or by linearizing the intercept of radiation and convection, because for superposition, you can write the question.
17:01:220Michele De Carli: area of the surface, HC times temperature of the surface, minus temperature of the air, okay, we can consider the heat transfer.
17:12:280Michele De Carli: If, as reference temperature, as room temperature, we consider the operative temperature, okay, which is the average between air and meridian temperature, okay, then we can consider that the heat transfer
17:27:910Michele De Carli: Due to convection and radiation, is
17:30:970Michele De Carli: towards the operative temperature, okay? So the operative temperature is considering both the radiant heat exchange and the convective heat exchange, okay?
17:43:790Michele De Carli: All right, so, at the end, but, of course, also in this case, we are interested in the
17:52:760Michele De Carli: In the, in the, in the segment.
17:59:790Michele De Carli: in the… it's a magnitude of this… Of this massive coefficient.
18:05:340Michele De Carli: And again, as we, into the history.
18:11:110Michele De Carli: One month ago, more than a month, two months ago, okay, maybe, maybe.
18:15:360Michele De Carli: That's not football Passionately? Okay.
18:20:580Michele De Carli: We said that depending on the temperature of the surface and the position of the surface, okay, we can have different heat transfer quotation, okay?
18:32:330Michele De Carli: So, the difference between the radial and the convective transfer coefficient is that the radial part is fixed, and the convective transfer coefficient depends on the
18:44:150Michele De Carli: On the orientation, and the…
18:47:370Michele De Carli: And the fact that it is higher, or, presents a higher or lower in temperature than the deer.
18:55:660Michele De Carli: So, recap, making a resume, if we had a heated floor, okay, if you remember, if you heat the floor warmer than the air, will heat up here, okay, and the air will, okay, by heating, okay.
19:13:100Michele De Carli: due to natural connection, to buy a CF, to add that the air becomes lighter, okay, and then
19:19:110Michele De Carli: We can have an in-house, okay, convective.
19:23:600Michele De Carli: Hang on, okay? So, in this case, for the floor heating, okay, in case the floor surface is
19:35:270Michele De Carli: It presents a greater temperature than the room. Temperature?
19:40:490Michele De Carli: Then we have the, let's say, the maximum heat transfer that we can get, and this is equal to the convectored, the radiant heat transfer. So, a radiant floor, okay, in heating, is, is,
19:59:410Michele De Carli: Joshua!
20:00:780Michele De Carli: the same amount of heat preferred by infrared adaptation and by convection, okay? And… which means that overall.
20:10:950Michele De Carli: Okay, we can sum then to have given what space coefficient. So, this is the overall passport coefficient, okay? So, this simulation, okay, coming back to this point, in this simulation, then.
20:25:730Michele De Carli: The condition that I have to put here will be the convert electrical coefficient of 11 watts substantial.
20:33:790Michele De Carli: Okay, might be the resistance, which is there, okay?
20:39:110Michele De Carli: reciprocal apologies.
20:41:50Michele De Carli: Of this value.
20:43:80Michele De Carli: Okay?
20:44:170Michele De Carli: Right? How many of you did the… Energy buildings?
20:48:990Michele De Carli: Rise your hand.
20:50:390Michele De Carli: Okay, so you know what I mean.
20:53:90Michele De Carli: I, I hope, okay?
20:55:620Michele De Carli: All right, so, so that is what happens for really keeping the floor.
21:03:590Michele De Carli: The…
21:04:820Michele De Carli: the same, phenomenon, but opposite, when we land in the cooling, in the, in the ceiling. Okay, so when we cool.
21:16:920Michele De Carli: the ceiling, we… the air, which gets in contact with the… with the surface, okay, will get colder, so we'll drop down, because
21:27:250Michele De Carli: it becomes heavier, okay? And in that case, by cooling the air, which becomes heavier, okay, then we have also an enhanced convection.
21:38:130Michele De Carli: convection, which is similar with the same amount of the convection that we have for the floor heating. Okay, so…
21:48:800Michele De Carli: The radiant, ceiling in cooling, okay.
21:53:990Michele De Carli: as well as the radiant floor in here, okay, exchanges, as well.
22:00:600Michele De Carli: exchange heat, okay, cooling. Absorb the heat, okay.
22:09:200Michele De Carli: in infrared and conductive way in a similar amount, okay? So, the same.
22:15:540Michele De Carli: So, a little gap for them, well, it's prescribed path has intrinsic location.
22:21:770Michele De Carli: esoteritas.
22:27:590Michele De Carli: Now, what happens if, instead, we have floor heating? Floor heating, we said that,
22:35:470Michele De Carli: When we… sorry, for cool.
22:37:780Michele De Carli: When we have the frog cooling, we are getting in contact with the cold surface, okay, tends to, tends to be, to be, to become colder and, of course, heavier. So, in this case, we have that the convection is, okay, less pronounced, okay, so…
22:54:310Michele De Carli: In this case, we have a smaller convection, okay, which leads to a smaller convection transfer position.
23:02:590Michele De Carli: And in this case, we have that, more or less.
23:06:660Michele De Carli: Okay, it's… the value is, let's say, one-third of water as water in heating conditions, so 1.5. So, it means that, basically, the overall heat transfer coefficient, in this case, is 7.
23:22:770Michele De Carli: Okay?
23:23:860Michele De Carli: So, you can see here that the…
23:28:760Michele De Carli: Floor heating, okay, is able to transfer heat, okay, 1.5 ways more, okay, 1.5 times more than floor heating, okay? So, and that is why, when we have seen the
23:48:320Michele De Carli: peripilator differences meeting and put on the floor. In real meeting, we could have a greater temperature difference from the water side than from the… than…
23:59:890Michele De Carli: the impact amount, okay? Since we are able to
24:04:260Michele De Carli: Have greater heating than cooling in floor.
24:09:10Michele De Carli: Ready up for Laura?
24:10:610Michele De Carli: Okay, then… At the end.
24:15:720Michele De Carli: Again.
24:23:740Michele De Carli: the power delivered by the water is the temperature difference between supply and return. And this is… I
24:36:800Michele De Carli: they are… we are… we are considering in this moment what happens here, that they are strictly related, okay? So what…
24:43:860Michele De Carli: The power that you deliver here is, at the end, what you get in the room, okay? So, it means that, basically, if you have a greater delta 1, okay, by considering the same flow rate, okay, then this means a greater delta 3 on the delta variant.
25:03:50Michele De Carli: gay.
25:04:580Michele De Carli: Imagine that you could… you use the same
25:07:690Michele De Carli: prorate in heating and cooling, okay. If you are able to provide more power in heating than in cooling, you will have a greater delta T in the water.
25:25:150Michele De Carli: Okay.
25:28:740Michele De Carli: When we consider a ceiling in heating, so a warm ceiling, okay, in this case.
25:35:660Michele De Carli: You get the same, let's see, it's the same,
25:39:640Michele De Carli: you have a similar phenomenon, okay? So, the air getting in touch with the radiant ceiling, okay, which is warmer, okay, will heat up, and by
25:54:310Michele De Carli: by becoming lighter, will, okay, stay on top of the room. And in this case, you have also a small commercial
26:05:800Michele De Carli: I have no explanation, okay, why,
26:10:70Michele De Carli: why it is like that, okay? But for a radiant, Chilling? Okay.
26:15:810Michele De Carli: You have a smaller exchange.
26:19:560Michele De Carli: Okay, so in… in low heating and receiving cooling, you have the same exchange, okay, by collection.
26:29:300Michele De Carli: It is not… based on the measurements that have been done in the past, okay.
26:36:350Michele De Carli: The few, the few values that we had for measurements.
26:41:100Michele De Carli: radiant surfaces, okay? We have that radiology.
26:46:550Michele De Carli: Ceiling, leads to 0.5 watts per kilometer per kilometers conducting task force, and the fluid equilium has a greater
26:57:560Michele De Carli: Okay, so it means that instead of 7, we have 6, okay? So we can say that the radian C…
27:07:60Michele De Carli: leads to half of the power that can be delivered in Jay.
27:15:560Michele De Carli: And that is why the position in that area. Correct, okay, somehow, that the radial ceiling in the meeting is not able to provide enough.
27:27:950Michele De Carli: Okay? It is somehow true, but we will say… we will talk about that later on, okay?
27:33:950Michele De Carli: So, now you can understand why I told you that
27:39:580Michele De Carli: For residential buildings, okay, where you have more heating demand than cooling.
27:48:420Michele De Carli: Which is not all… also true. It can be this, but it's okay.
27:54:40Michele De Carli: Probably not a purely, and then good for a gradient theory.
27:59:450Michele De Carli: But I said that gentleman thinks, okay?
28:03:150Michele De Carli: On the other side, if you have office buildings where you have a data pulling logged and be closed, then you can see that, in this case, it would be better to think about everything else.
28:15:420Michele De Carli: Okay.
28:18:490Michele De Carli: And, also, what I wrote you in the… One of the previous slide.
28:25:460Michele De Carli: In floor heating, you have a delta T which is greater in heating than one thing, okay?
28:31:900Michele De Carli: In Buregas evening, you have a team, goodbye.
28:38:200Michele De Carli: Okay? This is because you are able to exchange more heat and cooling than in heat.
28:43:380Michele De Carli: For the wars, okay, I told you, there is no
28:48:10Michele De Carli: No difference between either a warmer wall or an older one than the air. The value is around about 2.5, okay?
28:59:450Michele De Carli: Which is, by the way, more or less the same heat transfer coefficient that you use for the…
29:07:830Michele De Carli: average, okay, you use maybe 0.13 as a resistance, which is 7.5, 7.6H, more or less, okay, as overall pressure protection.
29:20:70Michele De Carli: I hope you remember that.
29:23:130Michele De Carli: Okay.
29:24:650Michele De Carli: So… Let's… Get the final figures, which are useful.
29:31:660Michele De Carli: Overall, it has your coefficient for 11.
29:35:820Michele De Carli: overall transfer position for throwing cooling 7, 8 for the warm, 6 for the radiant heating ceiling, and 11 for the cooling ceiling, okay? Why are this important? Because
29:54:870Michele De Carli: This is… Well, he's good.
30:04:900Michele De Carli: The power which is delivered by death.
30:08:570Michele De Carli: by the radiant system is the overall transfer position.
30:14:480Michele De Carli: Times the area, times the temperature difference between the surface
30:20:880Michele De Carli: And therefore, it is better, right? Okay? And, which is… Or say more time.
30:32:590Michele De Carli: Then…
30:34:340Michele De Carli: Thermal output, in terms of watts per square meter, which can be delivered by the radar system, is the H t factor.
30:42:950Michele De Carli: That is the temporary difference between the syllabus and the anti-stepatch.
30:48:940Michele De Carli: So now… Okay, what we have to consider?
30:54:60Michele De Carli: Is the limiting, or are they limiting time practices that we have for local discomfort from China?
31:01:750Michele De Carli: Okay, because we are talking about radiant system, and for the different radiant systems, we cannot exceed a certain value of surface temperature. Why? Because on the floor, we have some
31:16:340Michele De Carli: Extinctions, okay, due to, let's say, unhealthy conditions in heating.
31:22:670Michele De Carli: We cannot go below a certain temperature in cooling, because otherwise we feel the feet cold, okay?
31:33:880Michele De Carli: For, radiant, ceiling, we have, the,
31:39:680Michele De Carli: Radiant proximity, okay, and then for the walls, we will see… and of course, on the other side, in cooling, if we have no restriction from the thermal comfort point of view, we have restriction due to the
31:52:810Michele De Carli: Condensation to the dew point temperature, okay? So we cannot go below the dew point temperature, because otherwise we have… we have water in the…
32:02:670Michele De Carli: So, what we… that is why we look first at the first step. Okay, so the first step is to look according to the required power.
32:16:790Michele De Carli: which is the maximum output that we can get from a radiant surface according to the local contributions, or to the dew point temperature, okay? So, what we have to look at is the maximum
32:32:800Michele De Carli: heating and cooling power that can be delivered by a certain surface according to maximum temperature… okay?
32:43:540Michele De Carli: Again, driven by either… either comfort, healthy issues, or in cooling, okay, bed viewpoint temperature.
32:52:880Michele De Carli: Okay, so, let's start with the different koshas, okay? So.
32:59:690Michele De Carli: Let's start with the radiant flow.
33:02:390Michele De Carli: For the radial floor, we said that, we have, okay, we, cannot reach,
33:11:700Michele De Carli: or we can reach, let's say, 29 degrees C on the operator, and in particular, we have to reach 35 degrees C, okay? So we can…
33:23:620Michele De Carli: we can have, okay, these two temperatures. So, what does it mean? It means that, now, what you could say is.
33:36:20Michele De Carli: We have the maximum factor.
33:39:510Michele De Carli: Which is…
33:47:330Michele De Carli: But, you know, you see roughly there.
33:51:80Michele De Carli: The delta T will be… We're doing the surface in the room.
33:58:190Michele De Carli: Right?
34:01:370Michele De Carli: So now you're gonna see it?
34:03:420Michele De Carli: Which is a valid transportation for a proper heating system?
34:09:230Michele De Carli: 11?
34:11:00Michele De Carli: So… HPACH history level.
34:15:650Michele De Carli: Okay, which means?
34:17:199Michele De Carli: No, no, she doesn't.
34:26:840Michele De Carli: One's despairing people.
34:30:770Michele De Carli: Do you remember, more or less, how much you get? You got from the calculations in your house?
34:39:290Michele De Carli: Anyone?
34:41:159Michele De Carli: Thank you.
34:42:500Michele De Carli: Okay, sorry.
34:48:889Michele De Carli: Are we able to provide this 20 watts per square meter, or not?
34:54:699Michele De Carli: Yes.
34:59:790Michele De Carli: Yay?
35:03:380Michele De Carli: Do you remember how much power you had for a low insulin ability, more or less?
35:13:250Michele De Carli: What's per kilometer?
35:16:220Michele De Carli: Usually, I mean, this is a very well insulated building, okay? So 20 booms, if we divide by 3, it means more or less 8, okay, 60, okay?
35:27:440Michele De Carli: Do you remember, usually we use watts per cubic meter.
35:33:210Michele De Carli: Which is the figure for a known insulated building, or a building of the 70s, 60s, in terms of what the cubic location.
35:44:00Michele De Carli: So let's suppose 90 or 30?
35:48:550Michele De Carli: Which means that by multiplying this value by the usual height, which is 3 meters from about, okay, we have…
35:56:80Michele De Carli: the watts per kilometer. Okay, so a beating, which means writing watts per square meter, leads from 60. That leads to 60 watts per square meter.
36:10:410Michele De Carli: still looking, alright?
36:13:190Michele De Carli: And thirdly, what's per kilometers cubic meter times 3?
36:18:540Michele De Carli: No, he… Okay?
36:21:610Michele De Carli: Also.
36:23:230Michele De Carli: This is a rough value considering all the buildings, but then you have to look at room by room, okay, where you have a room which has two or three walls.
36:34:20Michele De Carli: Okay.
36:36:90Michele De Carli: then it will exceed this 90 watts per square meter. So…
36:40:820Michele De Carli: In this case, it's not sufficient, because you had just one random reward per square meter as maximum.
36:48:10Michele De Carli: Value of thermal power, okay?
36:52:220Michele De Carli: What?
36:53:890Michele De Carli: in the telephone area, We are allowed to exchange How much?
37:03:840Michele De Carli: Vertified my spreading, the better team is between you.
37:08:20Michele De Carli: There were no passive coefficient for the Indian authorities, You never?
37:20:690Michele De Carli: So, it might be that we could provide
37:24:120Michele De Carli: More heat in the peripheral area, so that it can reach the power of our… the glory, okay, of our…
37:33:500Michele De Carli: Holo, come on.
37:36:50Michele De Carli: What happens if we are not… if we are not able to convert the power by the peripheral area and the occupied area?
37:45:940Michele De Carli: If we need more power, then we can give by a radiant system. What should we do?
37:52:590Michele De Carli: He's the top lady.
37:54:590Michele De Carli: No, because… This is the maximum flow that we can make from the radiance.
38:00:210Michele De Carli: System.
38:03:240Michele De Carli: You cannot change it. This is the maximum power that you can get.
38:12:180Michele De Carli: How many of you have the radial season at home?
38:15:310Michele De Carli: The body?
38:17:320Michele De Carli: What do you have in the bathroom?
38:20:190Michele De Carli: Why?
38:24:780Michele De Carli: I mean, we use it for the… Yeah, okay, so… But we increase most of the time. Yes, because you're usually in the… in the toilet, due to the restrictions of the, of the, of the, of the area, because you have the toilet, you have the shower, and so on, you cannot
38:45:290Michele De Carli: provide 100% of the floor area, okay? So you need some additional power. When you need some additional power, then you work with an additional system, usually translator, or as we have seen, okay, the infield, as I told you, in
39:00:10Michele De Carli: No, then… goodness, okay? So…
39:04:410Michele De Carli: But it is important, we know that these are limits which are fixing the maximum thermal output of our system.
39:12:370Michele De Carli: And of course.
39:14:50Michele De Carli: the output, the thermal output that we need is based on the peak load calculation. So we consider the peak load calculation, we divide by the floor area, and then we can compare this
39:26:610Michele De Carli: The… the room by room, the local specific parallel.
39:31:620Michele De Carli: Okay, according to the maximum power that we can get from the previous system. Okay, if we cannot reach the goal, then we need an additional
39:41:630Michele De Carli: system.
39:44:490Michele De Carli: Okay.
39:46:490Michele De Carli: So this is for heating, okay? So we can say we have 100 water per heating in the octave, and 165, 100 feet, 165 water in the background.
40:01:210Michele De Carli: what happens in cooling? Okay, so in cooling.
40:04:870Michele De Carli: We are… yes, I told you. The 29 degrees C are fixed, but these are… these are fixed by the standards, okay? They have been fixed because, as I told you, in the… in the beginning.
40:16:530Michele De Carli: In the 60s, 70s, okay.
40:19:370Michele De Carli: The… due to the fact that the buildings were extremely, okay, requiring heating, you… you should get more than 30 degrees C on the surfaces, okay, which are two phenomena, basically, okay?
40:36:690Michele De Carli: One was related to the…
40:39:480Michele De Carli: to the, circular problems on legs, and the second was the dust, okay? So, you had also heat exchange, quite a huge convective heat exchange, so people complained about the dust, okay, so…
40:55:270Michele De Carli: I don't know now, but still a few years ago, people were complaining about the details. But today, and people are quite aware that
41:03:720Michele De Carli: you can get good comfort conditions with the system, okay? Anyway, these are the news data. I tell you, I, again, I told you, this is for European countries, okay? In some other countries, you can… you are allowed to exceed these temperatures.
41:20:310Michele De Carli: Now, what defines female?
41:23:850Michele De Carli: We have the, limit.
41:27:560Michele De Carli: of 90 degrees C, and the 90 degrees C is the minimum temperature. Okay, so there is a difference.
41:35:150Michele De Carli: So… In the case of heating.
41:38:650Michele De Carli: you are looking at the average temperatures on the floor, okay? In cooling, you're looking at the minimum temperature.
41:46:900Michele De Carli: Which is different.
41:48:510Michele De Carli: Okay, because I told you, when you do this simulation, okay.
41:54:230Michele De Carli: When you do this simulation, again, this simulation, you can see, you get 39 degrees, 100 watts per square meter, so…
42:02:60Michele De Carli: Okay, demonstrating what I told you, okay?
42:05:450Michele De Carli: Here we are looking at the average.
42:09:640Michele De Carli: temperature in the water, okay? At the water level.
42:13:990Michele De Carli: While here, In this condition, in the current condition, we need to proceed at the meaning
42:22:260Michele De Carli: When we have the minimum temperature, you pull it, Which point?
42:30:530Michele De Carli: No, no, I mean, let's consider that we are both conditions better.
42:38:200Michele De Carli: In the internet? In the internet, exactly. So, right above…
42:42:190Michele De Carli: Right on top of the pipe, on the supply, section, okay?
42:48:590Michele De Carli: Then we have, on average, 3 degrees C, as a temperature difference on the water. We can assume to have more or less the same
42:59:690Michele De Carli: 10% difference on the floor.
43:02:440Michele De Carli: There's something in the quantitism, right? And basically, the return.
43:07:700Michele De Carli: So, we have to think about the average temperature, which is responsible of the heat flow, okay? So, because when we
43:16:950Michele De Carli: Do this calculation and consider the average temperature of the surface, of the floor, okay?
43:23:10Michele De Carli: So… On the supply, we cannot go below 90 degrees C. We have more or less 3 degrees C.
43:32:430Michele De Carli: Round about.
43:33:570Michele De Carli: On the surface, so the average temperature will be
43:37:410Michele De Carli: between 90 and 22, which means 1.5 degrees C.
43:42:650Michele De Carli: Above the meeting.
43:44:850Michele De Carli: Love it.
43:46:180Michele De Carli: Okay?
43:48:120Michele De Carli: do that.
43:49:890Michele De Carli: If you had… Critically see, more or less.
43:53:500Michele De Carli: at… on the water level, okay, you will have more or less 3 degrees C also on the floor, okay? So.
44:02:940Michele De Carli: Since the…
44:04:710Michele De Carli: heat transfer is due to the average temperature of the floor, and this is the minimum temperature we can get on the floor, then average temperature will be 90 degrees C plus 1.5.
44:16:770Michele De Carli: Okay, so the average between 19 and 30 people.
44:20:500Michele De Carli: All right? In this case, 29 degrees is the average temperature, so you locally could get more than 29 degrees, okay, where you have a supply. But the average should be not… should not exceed 29 degrees, okay?
44:36:390Michele De Carli: So, with 20.5…
44:43:990Michele De Carli: If 20.5 is the average temperature, of the surface, values.
44:52:90Michele De Carli: Indoor conditions in middle summer, 26.
44:57:820Michele De Carli: Tines, or below the transfer coefficient for the floor.
45:03:400Michele De Carli: Did you do already the exam, or… Okay, so that is 5.5 times 7, okay, which is…
45:15:360Michele De Carli: A product in activities.
45:17:430Michele De Carli: 14 loss, for sure.
45:19:10Michele De Carli: Okay?
45:21:60Michele De Carli: Do you remember what I told you about? The typical power that you can get from
45:26:720Michele De Carli: And not just beating by overinxing my pulse from the solar vein.
45:35:820Michele De Carli: 50, okay? 50-60.
45:40:310Michele De Carli: What do you see something.
45:41:720Michele De Carli: So, in an office, you're not able to fulfill
45:45:250Michele De Carli: comfort with floor cooling, okay? And also, in residential buildings.
45:51:210Michele De Carli: But it's okay, we will talk about that when we will see also the… the unification, okay?
45:58:290Michele De Carli: So, this is, okay, this is the power that can be delivered by including cooling, which should absorbed.
46:08:180Michele De Carli: Pulling power, which can be given by a floor radiant system.
46:13:630Michele De Carli: Now, let's talk about the D.
46:16:830Michele De Carli: Radiant City, okay? Radiant City? Okay, we have…
46:27:170Michele De Carli: What do we have.
46:28:580Michele De Carli: Yep.
46:29:880Michele De Carli: That's really… the regenosymmetry, okay? Regina symmetry is very difficult to calculate, okay?
46:39:540Michele De Carli: in an early design phase, okay, or even in a design phase, okay? So…
46:47:710Michele De Carli: the general rule, general accommodation, is not to exceed 30, 32 degrees C, okay, on average, okay, which means that
47:00:400Michele De Carli: average news.
47:02:830Michele De Carli: all the active and passive, yeah? I want to remind that we need space in between the values, okay, in order to
47:12:880Michele De Carli: To, to connect the… the supply return pipes, okay, so more or less, you can consider that
47:20:210Michele De Carli: 70% of the world.
47:22:820Michele De Carli: of an old surface is the active surface, okay? So, the power
47:29:570Michele De Carli: That can be delivered by the radio system will be just… Due to the activity.
47:35:380Michele De Carli: Okay, okay, so the 70% of the available area. For the floor.
47:41:00Michele De Carli: We said that for the floor, we can consider the whole floor
47:45:540Michele De Carli: Radiating, okay, except the bathroom, okay, but usually
47:49:910Michele De Carli: I know that maybe you might have some furniture and so on, but usually you neglect it, okay? So, let's say that, this is…
47:58:20Michele De Carli: So, more or less, the typical rule is not too, okay?
48:03:240Michele De Carli: to exceed the 35 degrees C.
48:06:430Michele De Carli: Okay, for… in the afternoon. Okay, so we can assume consider 35 degrees C as…
48:16:260Michele De Carli: maximum temperature for the activity, okay? So, what does it mean? It means that, basically, we have
48:27:110Michele De Carli: Peking, right? So, we have.
48:33:800Michele De Carli: 35 minus… Eating?
48:37:940Michele De Carli: Plenty?
48:40:270Michele De Carli: Lives?
48:41:990Michele De Carli: Overall transfer coefficient for a radial ceiling, heating, See, circle, right?
48:49:320Michele De Carli: This is 15 times 6.
48:52:950Michele De Carli: Mountain Beat walks the scrimmes.
48:55:970Michele De Carli: Right?
48:57:630Michele De Carli: This is just the data. Usually, you do the calculations for
49:02:530Michele De Carli: Calculate the peak load, and you divide it by the overall area of the floor.
49:08:200Michele De Carli: So, that means 90.
49:10:890Michele De Carli: times 0.7,
49:20:550Michele De Carli: Excuse me?
49:22:110Michele De Carli: Well, super screen.
49:25:40Michele De Carli: Much less then.
49:27:490Michele De Carli: radiant flow.
49:30:850Michele De Carli: Is this sufficient to hit a building?
49:37:350Michele De Carli: How much do you have?
49:39:30Michele De Carli: 20, right?
49:42:480Michele De Carli: So, for new buildings, is not enough.
49:45:780Michele De Carli: Cheers.
49:46:850Michele De Carli: So, it's fair enough for new buildings, okay? So, new buildings, basically.
49:53:840Michele De Carli: It is the same to work with rigam floor or rigam signal, okay? Rigam floor comes slacks.
50:03:520Michele De Carli: And… for cooling.
50:14:60Michele De Carli: We could consider Roughly speaking, a condensation temperature of about 70, 17 degrees CO. So… let's say… Ine.
50:28:950Michele De Carli: You're the designer, so you set the conditions of the meeting side, okay, but let's say that…
50:39:340Michele De Carli: With 80 degrees of surface temperature, okay, you can consider to, let's say, have
50:49:490Michele De Carli: enough, let's say, margin to avoid condensation, okay? Even if you have plus-minus to degrees C, okay, even if the minimum temperature is 17, 16, okay?
51:07:620Michele De Carli: I would like to highlight that with the radiant, ceiling, okay, usually.
51:14:460Michele De Carli: Due to the fact that you have laminar flow, you have a smaller temperature difference, and so on.
51:20:230Michele De Carli: The temperatures difference that you have on the surface are much less, or the temperature is much more uniform than what you get in the front, okay?
51:32:300Michele De Carli: So, we can assume that 80 degrees C as average temperature, okay, is fine enough for avoiding conversation, okay?
51:41:110Michele De Carli: So… In this case, we have paid leave, minus.
51:47:50Michele De Carli: Seekson? Okay.
51:49:360Michele De Carli: Guys?
51:53:190Michele De Carli: It's 88 lapses.
51:55:930Michele De Carli: What?
51:57:830Michele De Carli: So, you can see that you have almost the same result that you have in
52:03:270Michele De Carli: In heating for the floor, but again.
52:08:840Michele De Carli: Just the 70%, okay. Okay, so 19.
52:12:10Michele De Carli: 9 times 17, or 94 seconds.
52:16:490Michele De Carli: 19 times 0.37 is equally, this is 316.
52:22:480Michele De Carli: 65, right.
52:24:450Michele De Carli: That doesn't count.
52:27:320Michele De Carli: What I told you about the efficient solution for pooling?
52:31:970Michele De Carli: This is the typical threshold, 60…
52:35:230Michele De Carli: What's per square meter, okay? So, you can use them.
52:38:810Michele De Carli: ingredient in, in, in, in offices.
52:42:720Michele De Carli: But you need to have good agro, you need to have good shedding devices and so on, in order to lower at 60 maximum watts per square meter the current liter of your
52:54:740Michele De Carli: Right?
52:56:240Michele De Carli: But… Hey, Dean? Okay.
53:01:200Michele De Carli: In this, you can cool an office building, okay, not with a radiant floor.
53:06:60Michele De Carli: And because they're known for deep blood.
53:10:610Michele De Carli: Okay.
53:13:990Michele De Carli: And… Finally, the war.
53:18:120Michele De Carli: For good laws, okay, we asked, Not really particular,
53:25:580Michele De Carli: problems for the maximum temperature. Why? Because
53:30:730Michele De Carli: We have potatoes. They are very…
53:34:560Michele De Carli: But they are reasonable, okay? You don't know exactly what happens, you know, organize a certain reward, okay? So you have to imagine that there might be some occupants
53:47:460Michele De Carli: more children, Elderly people, okay, who could, let's say, get in touch for some time, And they could do.
53:57:810Michele De Carli: But, okay, because we're in…
54:00:910Michele De Carli: When you put your hand on your wall, you're insuring the wall so that a person will
54:07:30Michele De Carli: increase, okay? So, let's say that, on average, for the city.
54:14:500Michele De Carli: safety issues, you can assume to have 60 degrees C in the active air.
54:19:340Michele De Carli: Okay? You could even have the interpreters, okay? But it's just recommending that, okay?
54:25:440Michele De Carli: So, with 40 degrees C, There, I think there are.
54:34:360Michele De Carli: Miles.
54:37:240Michele De Carli: Indoor conditions in winter.
54:39:440Michele De Carli: Really? Why do you think?
54:41:530Michele De Carli: times infrastructure. So we have 20 times A. This is 100.
54:51:810Michele De Carli: Lots of snow.
54:55:930Michele De Carli: In this case, just for the active area, because It's the one, okay?
55:01:930Michele De Carli: But you can see that you can get them.
55:04:470Michele De Carli: Right. I would… That my hoods are great.
55:08:930Michele De Carli: Mmm… For cooling, also, okay, there are no particular issues apart the conversation, okay? So, in this case.
55:18:120Michele De Carli: We have similar improved the ceiling. We have 18, or minus.
55:25:960Michele De Carli: 36, okay, in the solutions for salmon. Again, the transfer coefficient for the wall is the same, 8.
55:34:220Michele De Carli: Which means that we have A times where it's Code.
55:41:140Michele De Carli: Which is not that relevant, okay? It's not that high, because then you have to consider that you are just a partial, okay, surface, so…
55:49:100Michele De Carli: But again, it might be okay.
55:52:500Michele De Carli: Okay, so, this is… This is how you have to estimate the maximum output, right? This maximum output.
56:04:470Michele De Carli: 14.
56:06:520Michele De Carli: 18? Okay, this is 19 instead of 18, but… Doesn't matter that much, okay?
56:14:140Michele De Carli: So these are the maximum thermal output, and these thermal outputs have to be, okay, considered or compared to the power that you need in your
56:25:260Michele De Carli: And you have to do the calculation room by room, okay? And of course, the room which is the most critical one will be the one with
56:39:120Michele De Carli: Greater, the greatest value of I'll let, power stated of, in one specialty, okay?
56:54:970Michele De Carli: Pacific Islands.
56:56:490Michele De Carli: Listen, okay?
56:58:450Michele De Carli: So, this is the… And now? And then?
57:04:900Michele De Carli: If you are okay, If all your moves Are below this level.
57:11:850Michele De Carli: then you can go and search the system, okay? But before, you have to check if you might have
57:19:440Michele De Carli: progress.
57:21:150Michele De Carli: According to the maximum or minimum temperature of anything. Okay, so this is the perspective.
57:26:520Michele De Carli: Once you do this check, then you can go and select the type of radiant system.
57:34:50Michele De Carli: Okay?
57:36:800Michele De Carli: And then you go to the second step. So the steps… the first step.
57:41:190Michele De Carli: in the summary, is this one. So… You need to, I think.
57:48:390Michele De Carli: Carburetor, referring to the surface area.
57:53:90Michele De Carli: Okay.
57:56:810Michele De Carli: check for the active area, okay, the impact is the, the, the line that, this power is divided by the energy transfer, and then…
58:09:10Michele De Carli: Do you check if respects or not?
58:11:370Michele De Carli: their comfort or with the shoes, okay?
58:16:710Michele De Carli: If it's okay, you know, If it does inflate, then you need an additional ilupiso.
58:27:60Michele De Carli: Okay?
58:31:910Michele De Carli: So… How do you do the sizing? Okay, well.
58:37:380Michele De Carli: There are different economies, don't we?
58:40:480Michele De Carli: Let's start with this method.
58:47:340Michele De Carli: You can see there is a function, there is a linear function. You can see there is a…
58:53:300Michele De Carli: Let's say, a bottler.
58:57:590Michele De Carli: The timing of the time actually between the…
59:01:750Michele De Carli: The… the… the water, and the cake.
59:07:130Michele De Carli: Average water temperature and room temperature.
59:10:570Michele De Carli: And you have a bed with flux.
59:15:220Michele De Carli: Do you have an idea of what is the usual Figure that you use.
59:21:910Michele De Carli: If you divide, His followers, the secret power lies.
59:28:180Michele De Carli: A temperature difference between the water and the room.
59:33:870Michele De Carli: Which is the parameter that has these dimensions.
59:37:950Michele De Carli: Overall, it has a collection village.
59:42:850Michele De Carli: Oh, what system?
59:47:30Michele De Carli: Did you see some… Heat transfer coefficient, more or less, some curves.
59:52:400Michele De Carli: In the emission system, do you remember the first one that we see?
59:57:310Michele De Carli: We sold?
59:58:880Michele De Carli: Which was the first initial system that we saw.
00:02:630Michele De Carli: the usual territories, okay? Radiators means that they are testing
00:10:820Michele De Carli: the transfer coefficient in the test run. Why?
00:16:460Michele De Carli: Because they're producing series, right?
00:19:790Michele De Carli: Which are the radiant systems that are prefabricated?
00:27:640Michele De Carli: Meridian system.
00:29:480Michele De Carli: This is. This is.
00:31:580Michele De Carli: So, usually, the same producer, they have just 2, 3, 4 maximum sizes, systems, okay? So, for them, it's quite easy. They go in a test chamber, they certificate the thermal output of their systems, okay?
00:48:180Michele De Carli: So, for them, it's easy. You have… This…
00:54:270Michele De Carli: this line, which is representing the overall transfer coefficient of the system. So in this case, it's quite easy to size the system, or by knowing which is the thermal output of the system, okay, you can select the system output
01:11:320Michele De Carli: do that, how to, give… how to put them in the… Okay?
01:17:900Michele De Carli: Buff!
01:19:840Michele De Carli: If you had to put that inside the radiant system.
01:24:580Michele De Carli: you cannot do infinite tests, right? So the producer of the radiant floor is not able to provide you a certified value, because the radiant floor is built outside.
01:38:110Michele De Carli: And it depends on several issues, okay?
01:41:610Michele De Carli: So… For raisin, seems…
01:47:400Michele De Carli: Of course, of course, but let's see, for the system, usually you have the charts, so you work with the charts, so you… it's easy, okay, so you can select the supply temperature, or
02:00:870Michele De Carli: And every time we draw the water condition, specifically in the active area. Remember that this is the active area, because they test their time, okay? So, once you get the active area.
02:15:830Michele De Carli: Okay, then you can check which is the temperature difference between the room and the water, which is basically the water temperature.
02:24:160Michele De Carli: Okay?
02:28:550Michele De Carli: Hmm.
02:31:60Michele De Carli: Remember, Death.
02:35:270Michele De Carli: You have two different…
02:41:290Michele De Carli: You have two different things.
02:43:990Michele De Carli: Because the road transfer coefficient in the room will be different. Okay, so you have one line for 18 and one line.
02:55:410Michele De Carli: Okay?
02:57:260Michele De Carli: But once they had to test, they tested not only heating, but also, okay?
03:04:80Michele De Carli: Now, for a broad heating system, it is a little bit more complicated, okay? So, of course, you can do the simulation.
03:18:180Michele De Carli: You know how to do this, okay? So you can run the simulation, but then you will get paid, okay?
03:25:200Michele De Carli: So, there is another possibility to have a simplified resistance factor.
03:30:840Michele De Carli: Okay? Or, which is the most Helping our system, useful, okay?
03:37:160Michele De Carli: You can make, okay, you can use…
03:41:850Michele De Carli: Some correlations, okay, which are being pre-calculated.
03:47:380Michele De Carli: By experts, okay, by research institutes.
03:54:260Michele De Carli: which are basically made… which basically made several simulations, okay? And according to the simulation, they found the correlations,
04:04:120Michele De Carli: How dare output?
04:06:130Michele De Carli: is affected by the pipe spacing, the pipe diameter, the material that you're using on top of the… in the scribe, okay, on the… on the surface layer, okay? Just to mention, one centimeter of tile
04:22:150Michele De Carli: is much more conductive than 1cm of wood, okay? So, you can see the floor covering.
04:30:270Michele De Carli: okay, is affecting the thermality, okay? The pipe's dimension is affecting the thermality. The dimension of the screen is affecting the thermality, okay? The pipe distance is also affected. So, all these parameters have to be considered. So what they did.
04:48:940Michele De Carli: Basically, they made it.
04:51:280Michele De Carli: tons of simulations, okay, by changing the different parameters, and by checking the resulting coefficients, okay?
05:01:620Michele De Carli: So, how is this method based? Okay, I will,
05:07:570Michele De Carli: I will come to this point later. Oh, no, no, okay. So you… then, again, okay, they can provide, again.
05:15:520Michele De Carli: KH or KC, okay, based on this calculation. So this is a black box method, okay? So, basically.
05:23:850Michele De Carli: It is based on the loss.
05:26:720Michele De Carli: which are correlating the different parameters, and based on these different parameters, according to the questions that you have in the startup, you're able to estimate the dead time around, which is, at the end, the KH of your flow. Okay, so…
05:45:370Michele De Carli: Resume?
05:47:280Michele De Carli: In one way or another, you're able to estimate cage.
05:53:850Michele De Carli: what you're going to do, and what is in the Excel file that you have in Molder.
06:00:100Michele De Carli: is this… this method has been already implemented in the Excel file, okay? So you will use this Excel file.
06:09:770Michele De Carli: And you are going to size the radio system, okay?
06:15:850Michele De Carli: Based on this standardized calculation, okay? Of course, this method is valid in certain limits and ranges, okay?
06:26:30Michele De Carli: Because it's an interpolation method, so it is based on… is simplified, so it is…
06:32:400Michele De Carli: Working in… under some specific condition.
06:36:930Michele De Carli: In any case, Either you want with this, with this, with this, or with this, at the end.
06:49:380Michele De Carli: At the end, you will estimate, you will assume, calculate the KH, which is
06:57:200Michele De Carli: The overall heat transfer between the water and the…
07:01:200Michele De Carli: According to the geometry, the materials.
07:04:620Michele De Carli: The price destination of the radio system that you select.
07:09:440Michele De Carli: Okay?
07:11:870Michele De Carli: So, the age, then, times the…
07:16:110Michele De Carli: Temperature difference between the average temperature of the water and the room.
07:21:230Michele De Carli: will provide the thermal output of your system, okay? So, KH times the temperature difference between the water, okay, either dynamic temperature or average temperature.
07:35:240Michele De Carli: He said.
07:37:500Michele De Carli: If we are reducing the delta theory, I will lose 0.
07:41:730Michele De Carli: So, in principle, E is the VIN logarithmic temperature.
07:45:680Michele De Carli: Practically, you can consider even the supplier… the average temperature, okay?
07:51:330Michele De Carli: But, let's say that, again.
07:53:820Michele De Carli: KH times the temperature difference between the water average temperature and the room temperature will lead to the power delivered to the roof.
08:04:50Michele De Carli: R, and, okay?
08:07:450Michele De Carli: The power is emitted by the room, once you select a certain geometry, ado system and so on, is affected by the…
08:15:980Michele De Carli: The alternative difference between the author and water.
08:19:109Michele De Carli: If you need.
08:20:600Michele De Carli: Less power.
08:22:50Michele De Carli: would be?
08:28:270Michele De Carli: No way. Nowhere.
08:29:750Michele De Carli: Okay, so the lower is the load of your breathing.
08:35:840Michele De Carli: The lower will be the temperature of the water.
08:40:470Michele De Carli: Okay?
08:41:620Michele De Carli: We can… we have seen here… okay, even here, okay?
08:45:689Michele De Carli: We have 29 degrees C with 45 degrees C in the pipe.
08:51:180Michele De Carli: And this is for it.
08:53:100Michele De Carli: a wooden floor. So, wooden floor is the maximum
08:57:689Michele De Carli: Resistance that you get on the Conditioned material, okay?
09:02:880Michele De Carli: If we are dice, we might have 35 degrees C.
09:07:420Michele De Carli: Jay?
09:08:439Michele De Carli: But this is to get 90, 100 wall space per meter. But if you mean 20,
09:14:430Michele De Carli: Maybe with 23, 24 degrees Cels, it will be enough.
09:18:590Michele De Carli: So, you have 24 degrees C for heating, instead of 40, 45, 60.
09:24:290Michele De Carli: If you use a heat pump.
09:30:00Michele De Carli: you will have a higher COP.
09:32:840Michele De Carli: Okay? Because you… Won't need to work with high temperature.
09:38:29Michele De Carli: Okay?
09:39:160Michele De Carli: So that is the bigger… the bigger,
09:43:290Michele De Carli: the bigger, class of the rails. So…
09:47:649Michele De Carli: Uniquely, okay, you will just size your radius carefully, but you could, in principle, do it for… okay, the express sheet that you are going to use is not suitable, so we didn't make the calculation, okay?
10:04:60Michele De Carli: So, but… In principle, you can use it also for cooking, okay? But…
10:08:750Michele De Carli: We don't have to focus on that, okay? So we need just… Beautiful.
10:14:70Michele De Carli: Just a digital, okay?
10:17:240Michele De Carli: So… This is, for instance, what you do for a radiant architect.
10:22:900Michele De Carli: seeing, so, you can see that here you have Four types of…
10:33:110Michele De Carli: linear system. Basically, this is after this, okay?
10:37:830Michele De Carli: This is the other.
10:41:310Michele De Carli: radiant system, but yeah, and then yeah, it's just half of this, so you can see at 4.
10:47:200Michele De Carli: Or system for one producer, because you go just to run by one provider.
10:52:650Michele De Carli: And these are the activities that you have for routine, for instance, okay? So, if you're using the Raymond heating, okay, KC and KH are provided by the manufacturer.
11:03:630Michele De Carli: You select, you look at the power
11:07:240Michele De Carli: heat power from heating and cooling, okay? And you… Estimate the surface.
11:13:840Michele De Carli: Activator.
11:15:560Michele De Carli: And you check this activity according, okay, and then you work in KC and KH, and you check the temperature.
11:24:940Michele De Carli: blend of the water, the water temperature level that you have. These are the, okay, the two…
11:32:920Michele De Carli: lens. You can see, they see.
11:36:70Michele De Carli: Yeah, well, this is, the supply aperture, because…
11:42:50Michele De Carli: Usually, they provide you the supply temperature, because
11:45:100Michele De Carli: For the tests available in the splatter?
11:51:990Michele De Carli: So, just to give you an example, if you work with 30 degrees C on the sea.
11:58:190Michele De Carli: and suppress the temperature, you get 15 watts per square meter, okay? So, in case of your colleague, you have 30 watts per square meter.
12:10:900Michele De Carli: Divide is 0.7, okay, because Yeah, people see him.
12:21:180Michele De Carli: more or less.
12:22:870Michele De Carli: 30 watts per square meter?
12:25:460Michele De Carli: 20 DC has reprata.
12:31:80Michele De Carli: very small, okay? So, with 27 degrees C,
12:35:760Michele De Carli: You're able to eat them, okay?
12:38:690Michele De Carli: one building.
12:42:200Michele De Carli: Weird.
12:43:620Michele De Carli: And that evaluation, right?
12:46:170Michele De Carli: In Kumi, you can see, if you use 15 degrees C as supply temperature.
12:52:690Michele De Carli: You can see, you can do that.
12:54:340Michele De Carli: 17 phospherd in the activator, okay?
12:58:940Michele De Carli: Which is okay.
13:00:380Michele De Carli: Alright? Of course, you can get more, like AD,
13:05:610Michele De Carli: or 19, for instance, but 19 news.
13:09:970Michele De Carli: 13 degrees Celsius high temperature, okay, which is okay, still, okay, because they are 3-4 degrees C, okay, because
13:18:430Michele De Carli: I told you, the service director is involved in the same temperature, so it's okay, but… This is how it works.
13:26:340Michele De Carli: If you're doing the… well, this is just a… okay, now this is a little bit complicated.
13:34:490Michele De Carli: Okay, this is…
13:36:290Michele De Carli: I mean, next step, let's say. This is not for AJ, but I will try to explain this to you. So, these values are usually provided
13:48:740Michele De Carli: by testing in the classrooms, okay, in the… in the facilities, okay, in certified laboratories. So you measure the tesla output.
13:59:620Michele De Carli: Which is… going both at the room and backwards, okay? If you want to know how much
14:09:810Michele De Carli: Need, you need, you have the room.
14:12:480Michele De Carli: They have to be similar, it shows, and usually… okay, but this is too much.
14:17:460Michele De Carli: Doesn't matter. So you can use the charts, okay?
14:22:170Michele De Carli: This is, instead, what you do for the program, of course, and this is what you are going to do.
14:29:630Michele De Carli: You, again, the size will be similar, okay? In this case, KC and KH had to be calculated
14:38:10Michele De Carli: by U, and in this case, you will, you will calculate the
14:44:590Michele De Carli: the surface, the KC and KH. Okay, we explain how the system, how the…
14:52:780Michele De Carli: how the model is made, and then we…
14:55:770Michele De Carli: And then we see the expense sheet.
14:59:340Michele De Carli: the Excel spreadsheet on Tuesday. So,
15:07:660Michele De Carli: I told you, this is the standard, this is the old number of the standard, it doesn't matter. So there are different types of regions. Why? Because, as I explained yesterday.
15:21:680Michele De Carli: in the pasta, okay, we have several systems which have been proposed, okay, by the producers, but let's say.
15:29:200Michele De Carli: that you are going to size this kind of system, okay, which is the cold… are called System A or C, okay? So what we are going to do, you are simulating, okay, the installation of a standard radar floor, okay, in your house.
15:48:620Michele De Carli: Based on your actual length, and based on the calculation that you did for math.
15:54:960Michele De Carli: So, what you do is, basically, you consider to have Canadian floor, with
16:02:470Michele De Carli: the amount of insulation that is needed, okay, with pipes embedded in the screen, embedded in the concrete, and then the floor covering is up to you. You can select, you can choose the floor covering, maybe the floor covering that you have right now, okay?
16:18:460Michele De Carli: Okay, these are the other systems. Okay, I will, I will skip them. These are all the typical systems.
16:24:890Michele De Carli: You can see that for each kind of system, so A and C is what we are going to look at, okay, nicely.
16:31:260Michele De Carli: You can see this is the validity range of the methodology that we have implemented in the Excel sheet. I told you, it's a simplified method.
16:40:60Michele De Carli: So, there are some restrictions for the
16:44:300Michele De Carli: accuracy of the calculations, okay? As long as you are inside these values.
16:50:690Michele De Carli: Okay, the method that you're using, so the excess pressure that you're going to use.
16:57:990Michele De Carli: give the same results as you can do with A2D simulation, okay?
17:04:800Michele De Carli: So, the vanity is pipe spacing. D is the type space above 5cm. The SU is the,
17:24:340Michele De Carli: The recovery? Yes?
17:26:370Michele De Carli: And then one centimeter.
17:31:10Michele De Carli: No, I don't know, it's not… it's not… okay, let me see what… I think it's above the, basically, above the pita, I think it is. Yes, it's the thickness of the pita, okay?
17:41:450Michele De Carli: The diameter of the python, okay, between 8 millimeters and 3 centimeters, okay?
17:47:400Michele De Carli: And the, yes, and the resistance of the script on top of the pie, okay?
17:55:840Michele De Carli: Alright, so, basically, how is this method Jesus,
18:02:720Michele De Carli: Providing you some parameters, okay, which are used in this
18:07:540Michele De Carli: in this interpolation function, okay? So, based on the geometry and the thermal properties of the materials that we're going to select.
18:19:770Michele De Carli: they would… the spreadsheet will, provided the KH, M.
18:27:780Michele De Carli: This is not included in your Excel file, okay, but the standard provider also gets it, it doesn't know.
18:35:450Michele De Carli: And of course, the flow rate, the, the, the… Okay,
18:43:440Michele De Carli: Okay, we come to this point next week, okay? I want just to show you the equation, how it is
18:49:910Michele De Carli: It is… this is the question.
18:53:310Michele De Carli: Okay, so the Excel spreadsheet is in the database search. Okay, so here you can see…
19:00:800Michele De Carli: you have a pattern which is B, Banks?
19:06:650Michele De Carli: this function here, okay?
19:09:680Michele De Carli: So, basically, this is… the method, okay, so the equations that are implemented in XL5, okay, are these.
19:21:500Michele De Carli: B, which is a concept, okay, which is dependent on the type of system.
19:26:900Michele De Carli: And then you have AB times AT to the MP times AU.
19:33:730Michele De Carli: to the MU, and so on. AD, MU, okay? All these parameters, they are in a table, and they have to be interpolated, okay, in these tables.
19:45:260Michele De Carli: according to the different, let's say, settings of your operating system. So, depending on the diameter of the pipe, depending on the fast pacing, depending on the
19:56:900Michele De Carli: thickness of the, of the screen, depending on the, diameter of the diagonal, I have already said, okay? And the depth for the coloring material, okay? The thickness…
20:09:290Michele De Carli: So… all these, all these parameters, okay, are implemented. So,
20:16:40Michele De Carli: But that is not too much time, also, I think you're, like.
20:19:940Michele De Carli: tired, okay, I am too. So, I will give you 5 minutes rest.
20:26:330Michele De Carli: on discount, let's say, for the, for the, for the excitement. So this is, you can see that they are indicated to this,
20:36:50Michele De Carli: So AT, for instance, you can see, you have different values according to 1.
20:41:890Michele De Carli: to the resistance for the complete material, okay? So AT, and also.
20:49:880Michele De Carli: is the spacing factor. AB is the short covering, factor, okay? So I will just list them, and then we go and see them in detail next week. Okay, AU is the covering factor.
21:06:840Michele De Carli: And you can see that it is listed according to the type spacing, and
21:12:630Michele De Carli: the resistance of the covering, okay? And AD, which is the pipe diameter, the function of the pipe, is related to the pipe diameter, according, again, to the degree. So.
21:27:710Michele De Carli: Basically, okay, this is a black boxer, okay, which has this interpolation function.
21:35:930Michele De Carli: correlation function, right, correct, in English?
21:38:810Michele De Carli: Okay, interpolating fashion.
21:42:120Michele De Carli: Okay? Usually, the usual way to make an interpolating function when you want… when you have some observed data from either simulation or measurements, okay, is to
21:56:890Michele De Carli: rather than this kind of equations, I call your… Normal immigration.
22:05:520Michele De Carli: They didn't do physical packing for me.
22:08:560Michele De Carli: Yes?
22:09:990Michele De Carli: Fantastic.
22:12:970Michele De Carli: Of course, I usually use this method in order to explain the diagonal of the non-dimensional. So, usually you have, like, the best way is to do a
22:28:230Michele De Carli: AI to the M pi, okay, times MJ…
22:33:860Michele De Carli: Every time you have a parameter, okay, you can write an equation like that by a suitable secting of either experiments or solutions, okay? This is the usual way, of course.
22:49:490Michele De Carli: by a certain… by a certain question, okay? So this is the usual way you do the interpolation, okay, when you have a set of data, okay, and you want to represent this set of data by this parameter.
23:07:10Michele De Carli: If you are interested, you can check the eco, so for the… Forced convection in natural conduction.
23:17:500Michele De Carli: And, then you can, okay, go, because at the end of the day, Reynolds, you said, okay?
23:26:730Michele De Carli: Alright, so… With 5 minutes discount, okay, we can stop now, okay, and sweet.
23:36:270Michele De Carli: on Tuesday, I have a knife.
23:41:410Michele De Carli: Long weekends ahead.
23:43:870Michele De Carli: And, yes.
23:46:520Michele De Carli: recovery of SaaS, and… And enjoy the weekend, because, I mean.
23:53:290Michele De Carli: It's the right time to get…
24:00:100Michele De Carli: I'm not doing… Rock out, rock out!