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00:05:310Michele De Carli: All right.
00:08:826Michele De Carli: Let's see, excellent
00:14:710Michele De Carli: look. We can start. So we have a we have said yesterday, okay, so we we're here.
00:26:895Michele De Carli: So
00:28:20Michele De Carli: we can consider this stage. We have one. We have one. Let me check if it works the micro.
00:39:180Michele De Carli: The micro works. Let me see. Yes, it works perfect. So and
00:48:550Michele De Carli: so then this is what you can get in the very model, the right hand side.
00:59:720Michele De Carli: and on the left hand side you can have a simplified which is based on, let's say, the electric network. Okay, which is
01:13:790Michele De Carli: something that you can always do
01:18:130Michele De Carli: with the the. Let's see the term improvements. Okay, thanks to the okay
01:26:320Michele De Carli: kind of problems and electric problems. Yeah, I, as I told you, the bottom and the top side of the
01:35:80Michele De Carli: figure. So this year.
01:48:190Michele De Carli: And this year, okay, they are exactly the same. Okay, we have the
01:55:920Michele De Carli: services which are the reciprocal of the sorry overall heat transfer coefficient sum of convective heat transfer coefficient, and the gradient heat transfer coefficient. Okay?
02:13:310Michele De Carli: Now, when we look at the structure and the conduction to the structure, we can say, we can say that in principle we can simplify the approach
02:24:686Michele De Carli: by considering a 1 d problem above and below the 5, so we can see
02:35:710Michele De Carli: the level of the pipe.
02:37:630Michele De Carli: And we can consider one deep problem here and one deep problem that one and all day
02:50:70Michele De Carli: 2D. Problem related to the heat transfer between the water and the equivalent layer
02:58:30Michele De Carli: is included in this message.
03:01:300Michele De Carli: Of course, we are talking about steady state condition. Okay, so we are not considering time dependent issues. We are not considering internal inertia, so everything can be written in terms of equivalent resistances in case
03:18:840Michele De Carli: you would. Now you don't have, but in case
03:23:410Michele De Carli: in case we would like to do it in a dynamic way, we should also include the capacity. But in this case, we are just working on steady state condition. Okay, so we we are not interested in dynamic.
03:37:200Michele De Carli: So basically, this is the approach. Okay, so summarize. Yeah, what? That
03:48:740Michele De Carli: flowing? Okay. The water is exchanging heat with the the, with the the let's say the the being.
03:59:330Michele De Carli: the concrete layer, the equivalent layer types. And then we have production above and below.
04:06:80Michele De Carli: Then no.
04:13:440Michele De Carli: How can we size the ingredients? Basically, we work in 2 different steps. So in 2 different times. Okay.
04:24:840Michele De Carli: so the 1st step is to look at what happens above. Or let's say in the room, okay? So between the surface of the other
04:36:930Michele De Carli: system and the room. So the 1st step is to analyze the heat transfer between the
04:45:140Michele De Carli: surface. Consider at an equivalent temperature. Okay, so that's if I told you that we can see
05:12:490Michele De Carli: section with the Bay average
05:18:300Michele De Carli: local 10 production. Okay, data age, Theta X minus Theta
05:26:640Michele De Carli: I, the case is the temperature of the water side is the exact.
05:36:280Michele De Carli: Okay. Thank you.
05:38:200Michele De Carli: Right?
05:39:420Michele De Carli: Or that, okay. Now,
05:46:40Michele De Carli: we consider an equivalent average, which is the
05:53:590Michele De Carli: average temperature transferring heat to the room. Okay, exchanging heat with the room.
06:00:402Michele De Carli: By means of the overall disaster for friction. Okay of the surface.
06:09:37Michele De Carli: What we have to do is to understand how much he
06:15:290Michele De Carli: can be transferred, and the exchange between the surface and the room.
06:20:450Michele De Carli: and which temperatures which we can get on the surfaces and check. If these temperatures are reliable or not, if they are providing comfort.
06:34:550Michele De Carli: Once we make this check this 1st step, then
06:39:560Michele De Carli: we can go and analyze the radiance system on the
06:47:570Michele De Carli: from the geometry point of view, the type of pipe, the pipe spacing, and so on. But 1st of all, we have to analyze the heat exchange between the surface and the roof. Okay.
07:01:180Michele De Carli: so this is the 1st step. So looking at the 1st step, then we can recap what we have said. When we talked about when we make when we made sorry the recap of the heat transfer. Okay, so I will
07:23:170Michele De Carli: meeting. Okay, so basically in
07:29:700Michele De Carli: in each condition, we can consider the combination of the heat transfer due to convection and the heat transfer due to production.
07:40:70Michele De Carli: Talking 1st about the info and heat exchange.
07:45:872Michele De Carli: We said that basically we can simplify the general equation of the infrared
07:56:380Michele De Carli: change which is or which could, we should take into account the absolute temperature, the force. Okay, we can simplify it. And we can just consider a heat transfer
08:12:670Michele De Carli: for the link in
08:15:500Michele De Carli: the infrared addiction, which is on a range 5. So that means that when we multiply this overall sorry.
08:29:230Michele De Carli: radiantly transparent, one of these shirtures each oh, and their services.
08:38:250Michele De Carli: And
08:43:630Michele De Carli: and then who?
08:49:300Michele De Carli: Okay, we can.
08:55:870Michele De Carli: Okay, so once you pertaining, that's 110, or
09:04:680Michele De Carli: that we are interested more in is the use it? He's it specifically, okay. So they specifically transfer
09:18:70Michele De Carli: the power. Personal face is H.
09:22:420Michele De Carli: Guns.
09:23:820Michele De Carli: In fact.
09:31:430Michele De Carli: what's meter?
09:34:520Michele De Carli: Hello, thank you.
09:38:190Michele De Carli: Watch this whole meeting right?
09:45:310Michele De Carli: Oh, sure.
09:48:140Michele De Carli: HR. Is 5.5,
09:51:680Michele De Carli: and then we have to add the okay they connected. He transferred
09:56:740Michele De Carli: the competitive, and then it goes to recap. If we have a World war
10:06:150Michele De Carli: to remind you that we have
10:08:270Michele De Carli: and enhanced biasing effect because the air is heating up. Okay, getting less
10:16:965Michele De Carli: having less density. So rising up. And then when it cools down, when we have the cold surfaces, then it gets down, and so on. And this will have as effect a
10:33:300Michele De Carli: heat exchange great friction due to convection, which is the same as communication. Okay, if very much
10:42:120Michele De Carli: so in this case we have 5.5 watts per square meter, so a radiant floor, in heating
10:50:550Michele De Carli: it is exchanging as much heat, for by infrared as much exchanges or transfers to what did they say?
11:06:220Michele De Carli: Internet and connection? There's this, okay, so 50% of 50%.
11:11:430Michele De Carli: And of course, we are interested more than this on the overall history construction. So on this.
11:20:770Michele De Carli: So h
11:26:410Michele De Carli: customer coefficient that we have on the surface.
11:32:454Michele De Carli: Now for Erython floor in
11:37:590Michele De Carli: in. Sorry for let's go here for a ceiling cooling.
11:47:390Michele De Carli: We? I said, that we have the same proceeding.
11:53:960Michele De Carli: Okay is pulling the air. The air is dropping down, due to the increased capacity. And then when it heats up on the warm surfaces, okay? And then the density will increase. So it will have okay, it will rise up and then will be cooled down again by the radiant ceiling. Okay, in that way we have a convection which is similar to the.
12:27:720Michele De Carli: So in this case we get the same, he transfer coefficient in. So so at the end.
12:36:790Michele De Carli: also, radiant ceiling and cooling
12:40:460Michele De Carli: is transferring 50% of the energy by convection and 50% of energy by radiation.
12:48:775Michele De Carli: Overall, we have that each square meter, each
12:56:500Michele De Carli: having a temperature difference between the surface and the room. We have 11 watts per square meter. Okay, as heat is changing.
13:07:63Michele De Carli: For the cool radial floor. Okay? Sorry.
13:15:670Michele De Carli: We said that when we could hear here.
13:20:380Michele De Carli: Okay, it will mainly be still okay, so that we will. We won't have a a big movement, a big bias effect. So the velocity of the of the air in the room will be reduced. That means that the
13:37:710Michele De Carli: actually it was coefficiently also reduced compared to the world floor day based on the
13:51:180Michele De Carli: literature data. Okay, experimental data. This m, this interchange coefficient is one.
13:59:650Michele De Carli: Okay?
14:00:740Michele De Carli: So overall 5.5 plus 1.5 gets to 7. Once there's go
14:17:620Michele De Carli: the same, but opposite is for the ceiling heating, so also in ceiling heating, we have a warm surface on the top of the room. The air heats up, so my density will
14:31:920Michele De Carli: stay. Okay on the, on, the, on the top side of the zoom
14:42:240Michele De Carli: volume of the room. And also this case, we won't have. Almost no, no.
14:54:80Michele De Carli: air movement. Okay.
14:57:717Michele De Carli: It is not unexplained. There is not a physical matter, okay or matter. Sorry.
15:08:360Michele De Carli: but based on the literature data available, they
15:17:500Michele De Carli: convective heat exchange coefficient for a radiant heat to ceiling is lower, smaller than a radian floor.
15:27:240Michele De Carli: Okay, I have to admit that. Anyway, we have
15:32:370Michele De Carli: some works. Very old works in heating. Okay for sealing. We have a few works. Just one work. Okay on the floor.
15:44:490Michele De Carli: Okay.
15:46:30Michele De Carli: But let's say that these are the data that
15:49:100Michele De Carli: dance out from the leader. Okay.
15:54:260Michele De Carli: alright. So we have that irradiate
15:58:501Michele De Carli: ceiling. Okay, is exchanging 6 watts per square meter, driving in heating slightly less okay than the.
16:13:560Michele De Carli: On the other hand.
16:18:500Michele De Carli: in the the receiving, they exchanged the same way to be transferred
16:26:190Michele De Carli: for the walls. Okay, I like, I would like to remind you that it doesn't matter if you're heating or cooling the air. The velocity is the same. Okay, local velocity is the same. And we have 2.5 in average. As the heat transfer coefficient and overall is 8 watts per square.
16:48:510Michele De Carli: Okay? So in a radiant wall, as the same heat transfer coefficient either for cooling or for heating. Okay.
16:58:730Michele De Carli: okay, so looking back or coming back to this point, what can we say? Well, the radiant floor is the better solution for heating, because the greater coefficient
17:13:960Michele De Carli: for heating is for the radiant flow, while the radiance ceiling has a lower, a smaller heat transfer coefficient almost half. Okay. On the other hand, if you want to cool, the radiance ceiling is the best solution, because the radiance has the greatest
17:38:100Michele De Carli: it transfer coefficient. Okay, 50 or more, even more than 50% over. Okay, yeah, he's good.
17:50:860Michele De Carli: It's okay. Then it's also coefficient that we have for true brush.
18:01:280Michele De Carli: Okay, okay. So I come back in this, like here and now we can understand the red values
18:19:980Michele De Carli: really get out the worker.
18:24:620Michele De Carli: So if we could have, let's say 3 to 7 for this.
18:34:750Michele De Carli: including this will be more or less half. So we have 11 Watts per square. Liter.
18:54:110Michele De Carli: Okay?
18:57:514Michele De Carli: So if we are able to exchange once they get okay in Haiti, seize the power.
19:11:40Michele De Carli: Looking at the water waters. There it is
19:23:630Michele De Carli: supply minus return temperature of the water times. The specific heat of the water and the mass flow rate of the water right, and the same mass flow rate in heating and cooling, the directly will be double in heating and half.
19:40:548Michele De Carli: Okay. So that is why we have 3 to 7
19:45:70Michele De Carli: degrees C, as temperature difference in the water for a
19:51:530Michele De Carli: floor heating and 2 to 3 degrees temperature difference for a floor.
19:59:570Michele De Carli: Okay? Because your now they'll continue
20:10:131Michele De Carli: the same for the radiant ceiling. Okay, in.
20:17:570Michele De Carli: since you have the double of the heat exchange you have. You have sleep.
20:23:960Michele De Carli: then, in this case you will have
20:27:930Michele De Carli: in 2 3, you see, and equally 3.
20:34:270Michele De Carli: In any case, we have a stricter limit of the water temperature
20:44:638Michele De Carli: smaller length. The pipes. Okay? And the smaller size of a the of the pilot. Okay? So in any case, and also do the
21:04:764Michele De Carli: okay.
21:06:690Michele De Carli: So that that is how it is. And that is how it works.
21:13:240Michele De Carli: Clear.
21:14:830Michele De Carli: Okay? Questions.
21:18:990Michele De Carli: Okay?
21:21:900Michele De Carli: And now let's go on. Okay, on looking at that 1st step. So we said that basically, we have analyzed, or we have calculated room by room. Your
21:37:900Michele De Carli: okay? So you you have calculated the power for heating with the U value of the walls. Times, area times the empathy
21:48:710Michele De Carli: for you. Some. Let's see, dynamic calculation. Okay. But in the end you have the team
22:02:850Michele De Carli: big load for booking and the big load for it.
22:08:150Michele De Carli: Are you able to fulfill the log of your room by the radiant system? Well, what you have to do is to divide a power of your
22:20:460Michele De Carli: system by the so called active area. Okay, we come to this point later. Okay, to to the what is the active area. Okay? But let's let's 1st talk about
22:39:150Michele De Carli: we, we actively have the overall floor as a active area. Okay, in this case, if you divide the power, big power
22:51:120Michele De Carli: calculated by the area of the floor. You have the specific power. You want specific. Okay? You remember, I I did show you
23:01:610Michele De Carli: the best one everything we chose Tokyo. Now it is become.
23:08:900Michele De Carli: This power
23:10:470Michele De Carli: has to be delivered by our radiance system. Right? So our radiance system has to be able to supply this specific power. So this, what's per square meter? And if.
23:25:880Michele De Carli: how can we estimate the specific?
23:31:211Michele De Carli: Yes, I wrote, I don't know where it is there.
23:38:650Michele De Carli: Products of the overall heat transfer coefficient. And the temperature difference between the surface and the room.
23:47:740Michele De Carli: Right?
23:48:900Michele De Carli: Correct. Okay, so specific power is there? No, it's efficient times the temperature difference between the surface.
24:00:170Michele De Carli: But, as we said, when we look at the localized comfort parameters, okay or discount oops.
24:14:10Michele De Carli: we said that we have some limits in the surface temperature. Okay? And these limits can be
24:25:370Michele De Carli: then be and can be limits. For this comfort can be limits for other purposes.
24:37:780Michele De Carli: Okay, so we have a maximum temperature allowable in heating for the surface and a minimum temperature allowable for
24:51:210Michele De Carli: okay? And what we have to check is the maximum power which can be delivered by the radiant
25:02:90Michele De Carli: system. Okay? Because the radiant system has a role, the transfer coefficient.
25:09:680Michele De Carli: Okay.
25:11:110Michele De Carli: But we we cannot go above a certain limit of the perfect. In India we cannot go below a certain.
25:24:590Michele De Carli: So we have a maximum temperature in heating.
25:28:160Michele De Carli: Okay, we are not able to exceed, and we have a minimum temperature for the surface. In cooling
25:35:20Michele De Carli: that we cannot go we cannot exceed.
25:38:770Michele De Carli: In both cases we will have the maximum temperature difference between the room and the surface. Okay, and this will lead to the maximum power specific power which can be delivered by this.
25:54:130Michele De Carli: And so each service, me
25:57:850Michele De Carli: temperature. And when we reach this limit, this is the maximum specific power that the surface is able to provide to them.
26:07:310Michele De Carli: Okay, here, of course, 1st want to check, which is this maximum specific power.
26:21:350Michele De Carli: And of course we will have to see if our
26:24:860Michele De Carli: room specific power that we have calculated
26:29:90Michele De Carli: is below or above this limit, the maximum
26:34:370Michele De Carli: specific power which can be delivered by the surface. If the power that you have to deliver in this room specific power is smaller, it's fine.
26:43:660Michele De Carli: You don't reach the maximum or minimum temperatures for video cooling.
26:48:160Michele De Carli: If you exceed the maximum or minimum temperatures, then there is a problem
26:54:600Michele De Carli: because you're not allowed to exceed the temperature in it, and you cannot go below the this temperature.
27:03:960Michele De Carli: and then you have to check how to solve the problem.
27:07:550Michele De Carli: Okay? But let's 1st have a look on, which is, which are these limits, and how we can get this maximum?
27:19:880Michele De Carli: Yes, 20 conditions with 20 conditions. Okay?
27:27:900Michele De Carli: 2018 and 2016.
27:32:280Michele De Carli: No, really right? Radiant eating. Okay.
27:42:60Michele De Carli: Since long time already in the northeast, in Europe, I've
27:49:900Michele De Carli: I think also in the United States. But I'm not sure about that. I think so.
27:54:220Michele De Carli: The maximum allowable package in the occupied area.
28:00:650Michele De Carli: let's say, 90 cm, one meter from a from the surrounding walls, right?
28:09:710Michele De Carli: The average temperature on the floor should not exceed the 20.
28:16:460Michele De Carli: Okay, it's not a safety, what? It's a safety.
28:23:310Michele De Carli: It's not if we go above.
28:26:520Michele De Carli: It is stuff that we have an unhealthy condition. Okay, but it was a limit which has been fixed. Let's say.
28:35:860Michele De Carli: when
28:37:140Michele De Carli: in the sixties. There were the radiance system working, I think. Okay, the 1st radiance systems, they, in order to face the
28:47:730Michele De Carli: You value, which were extremely high. So the power in the rooms were extremely high. They had to push a lot. Okay? So the the surface temperature could be even 35, 40 degrees. Okay? And in this case it could cause problems.
29:06:190Michele De Carli: Because if you had too high temperatures all day.
29:09:520Michele De Carli: sure, you can get problems in the circular. Okay.
29:19:640Michele De Carli: I want to remark that this is a regional
29:24:260Michele De Carli: real restriction. Okay, if you go in Japan and Korea, the temperature, the temperature could be even 40 degrees.
29:32:800Michele De Carli: They are happy to have the the temper, the the floor at 45 sit down and they and they heat up. Okay. And even though it's not really healthy. Okay? But it's
29:49:804Michele De Carli: okay.
29:51:529Michele De Carli: So in in Europe and in the United States, they
29:58:300Michele De Carli: floor temperature in the central area of the room.
30:03:590Michele De Carli: When we get the maximum average time in the telephone area, we can go up to 35.
30:13:570Michele De Carli: Okay?
30:15:930Michele De Carli: As I told you from the water temperature point of view.
30:22:550Michele De Carli: temperature difference is, let's say, on average
30:27:90Michele De Carli: 3 to 5 degrees, let's say 5 degrees. Hey? The 20 years ago it was 7, 9,
30:33:960Michele De Carli: 2 days, 6 to 5.
30:36:390Michele De Carli: Okay, this is the recommended okay.
30:41:00Michele De Carli: as I. You can see from the corners of the picture these fantastic pictures, of course. You can see that the supply temperature is warmer than the internal temperature. But what you are interested in is
30:58:10Michele De Carli: which is responsible of the overall temperature. And and it's a heat exchange.
31:04:800Michele De Carli: When we talk about the meeting temperature. That is a little bit okay.
31:10:660Michele De Carli: because we have seen that for the localized thermal comfort condition, we are not. We should not go below. That is,
31:24:440Michele De Carli: yeah.
31:25:440Michele De Carli: Then the the conduction through the through the shoes, okay, will be will lead to an uncomfortable condition. Okay?
31:36:130Michele De Carli: And and in this case
31:41:540Michele De Carli: you have to remember that 90 degrees is the local minimum time.
31:47:180Michele De Carli: not the average temperature. So the local minimum temperature is
31:53:260Michele De Carli: right in the entrance of the water in the room. Because this is the minimum temperature point that you have. Okay, so if you limit that 90 degrees minimum temperature.
32:06:20Michele De Carli: If you want to know on average, which is the temperature of the surface responsible for the heat transfer, then you should consider. Like I told you yesterday, we can consider to have 1.5 temperature difference between
32:25:586Michele De Carli: the minimum and maximum temperature. Let's say, an average temperature in the floor. So you have to consider that
32:34:510Michele De Carli: from this point to the average temperature of the floor, you have to increase 1.5. The temperature okay, because 19 is the local temperature. But the average temperature will be more.
32:54:540Michele De Carli: It looks great.
32:55:790Michele De Carli: Right?
32:58:380Michele De Carli: in this case you have, let's say, 3 degrees temperature difference between return. Okay? And in this case you should consider 20.5 as
33:11:20Michele De Carli: average temperature of okay, so 29 in the occupied area
33:17:610Michele De Carli: 35 in the occupied area in heating right?
33:21:570Michele De Carli: And these are already average condition, 19 degrees minimum local temperature plus 1.5 in order to get average temperature.
33:32:250Michele De Carli: Okay for the regular floor. Usually all the floor is
33:40:30Michele De Carli: supplying heat or cool. Okay, so we activate all their food
33:45:350Michele De Carli: for this city. It is a little bit more.
33:49:180Michele De Carli: One gross.
33:50:840Michele De Carli: As I told you, I will go back to the picture. I don't know how much it takes.
33:59:460Michele De Carli: Okay, you can see that here first.st
34:02:252Michele De Carli: Well, this is the radiant wall. Okay. But anyway.
34:07:430Michele De Carli: okay, you can see that here
34:09:830Michele De Carli: you have a preferably 30 Paris you have to connect.
34:14:960Michele De Carli: So you have to leave some space
34:17:60Michele De Carli: between one and the other. Okay, so you need some void spaces
34:22:540Michele De Carli: where you are putting the the pipes, the supplier pipes you have to connect with some fittings. Okay? And you need space. Okay? Because
34:34:900Michele De Carli: it's not like when you do the surgery operation that they have something. That's because so you need to do it by hand. I mean, it's not. We have no robots still working.
34:46:130Michele De Carli: Okay? And even the robots. Okay, anyway, so we need space. And this space means that we, we are not able to activate all the.
35:00:152Michele De Carli: So then later, when you once you finish to connect the pipes, okay, you will close the ceiling by
35:10:733Michele De Carli: gypsu board. But these gypsu board partners are not active, they are not. They have not pipes.
35:20:780Michele De Carli: Yeah, okay? So you have to consider that your active
35:26:730Michele De Carli: area is only a part. Okay? Only a fraction of your overall surface. Okay, how much is this? More or less? Okay.
35:38:740Michele De Carli: it's 70%. So more or less, you're able to cover 70% of the world. Sometimes you can even get.
35:49:130Michele De Carli: we will have a greater percentage. But let's say that on average, this is the they
36:00:430Michele De Carli: in this case. Okay.
36:04:611Michele De Carli: What is the parameter for the for the which is the need?
36:13:760Michele De Carli: Or how can we define the limit for the radiant ceiling?
36:19:290Michele De Carli: If you remember, we talked about the
36:24:350Michele De Carli: mean radiant acidity. Okay, so the sorry, the radiant acidity.
36:29:410Michele De Carli: So the radiant symmetry is this
36:33:337Michele De Carli: local discomfort parameter, which is the teaser
36:49:100Michele De Carli: responsible for?
36:52:50Michele De Carli: Explain how the different heat exchange that we have from one part of the body, and the other like infrared radiation.
37:00:100Michele De Carli: can be the 2.
37:03:230Michele De Carli: We satisfaction, say uncomfortable conditions, and we have seen that the most critical condition is very.
37:17:870Michele De Carli: This is the worst case. And this is, let's say, the only case where we might
37:22:870Michele De Carli: this code. Okay, so the other surfaces, they not. They do not really lead to radiant asymmetry discourse.
37:32:790Michele De Carli: but lead to headaches. Okay, nausea. And so so we are not we. We should not exceed the regular symptom
37:45:70Michele De Carli: so far.
37:47:410Michele De Carli: Well, up to one year ago or 2 years ago.
37:50:450Michele De Carli: but that we have published that we can increase the reader to symmetry level. Okay.
37:55:918Michele De Carli: let's say that anyway, today the radiance is still fixed at 5 degrees temperature of this parameter. But usually you're not able or it's difficult. It's complicated for a designer to to calculate this radiance. Okay? Because usually what you have is just the power. You don't make any. Let's say
38:24:712Michele De Carli: tailor the calculation for the info.
38:27:840Michele De Carli: So the Ravian passymetry is something which you can define physically. But basically you will never or you never calculate.
38:37:470Michele De Carli: So, since it is a little complicated to calculate the radial prosimity based on your mission on the design stage. Let's say that for
38:49:840Michele De Carli: sake of simplicity, of simplicity, and my concerned, citizens. Certainly he's okay.
38:58:130Michele De Carli: The usual value that has he posted or
39:03:740Michele De Carli: needs which have been before so far.
39:06:570Michele De Carli: there are 35 degrees in the active area. Okay, it's not the
39:14:540Michele De Carli: the Bible. Okay? So it's not. It's not. there is not a really scientific
39:22:805Michele De Carli: in work behind.
39:25:970Michele De Carli: Okay, my Pcs are concerned.
39:28:780Michele De Carli: It's very difficult that with 35 degrees you can get the 5.
39:38:650Michele De Carli: Remember the ventical asymmetry is called like that because
39:42:40Michele De Carli: you are. You have a defective exchange between the upper and lower. Okay? And since the temperature, the the planear radial temperature is calculated
39:57:60Michele De Carli: on top below the the vertical radiance is calculated. Okay, in a vertical. Okay.
40:08:790Michele De Carli: so 35 degrees is the maximum temperature.
40:16:320Michele De Carli: Okay?
40:19:90Michele De Carli: And
40:26:240Michele De Carli: well, basically, only you have no problems for your comfort.
40:31:370Michele De Carli: The only problem is that you have is to reach 30.5.
40:40:810Michele De Carli: I'm not allowed
40:45:620Michele De Carli: sure if you have question, ask me. Yeah, because if you don't make question. Maybe I
41:05:680Michele De Carli: you, too, isn't. We don't.
41:09:550Michele De Carli: No, because they are on the top of the room. So yeah, one sitting and going missing.
41:21:680Michele De Carli: No, they all the other part of them installed.
41:25:590Michele De Carli: So the-the- it.
41:29:710Michele De Carli: When I when I told you to measure the play.
41:34:90Michele De Carli: 2 like to have a call in, and the difference is the upper side of the phone. So this
41:44:780Michele De Carli: is a the-the-, let's say the upward. Okay.
41:50:650Michele De Carli: And it's here that you have top of the card and then the file.
42:00:280Michele De Carli: So we have a radiant planner detection.
42:10:990Michele De Carli: So the difference is perfect.
42:17:430Michele De Carli: And so the call is, for example.
42:20:10Michele De Carli: maybe because that is how you have to measure the training.
42:24:30Michele De Carli: It's according to you, like infectors.
42:28:630Michele De Carli: But let's say that the the temperature difference is limited
42:33:290Michele De Carli: because it is the plan attached above. And the plan.
42:43:380Michele De Carli: Okay?
42:46:10Michele De Carli: Apologies.
42:48:935Michele De Carli: Well, yeah, of course, you by limiting the temperature in the configuration, stay here.
43:11:400Michele De Carli: A good question.
43:13:100Michele De Carli: So who? They don't understand it. Okay, okay, anyway. Yes, it's a good point.
43:21:30Michele De Carli: So for the minimum temperature, the limit is the condensation. So actually, we have not no limits. Okay for the conditions. But we have a elevate in the
43:39:580Michele De Carli: values, in the, in the low value of the temperature surface.
43:45:254Michele De Carli: So of course, it depends on the doctor
43:50:850Michele De Carli: meter. Okay? Or it depends on the temperature and relative humidity that you have.
43:59:590Michele De Carli: But let's say that on average, the minimum temperature is 18 degrees. Usually when you work with the radiance system.
44:11:300Michele De Carli: the control strategy is, of course, measure that.
44:27:630Michele De Carli: and usually the supply temperature for the water is one degree above
44:34:520Michele De Carli: the usual counter strategy that is used by the radiant or or free. Okay, so let's say that the average temperature is more or less 80 degrees in the
44:54:810Michele De Carli: English means the local. You might have even said in English, okay.
44:59:530Michele De Carli: 20 degrees is okay. Because if we are 36, 50%, we have seen it. Also, when we talked about a
45:08:780Michele De Carli: dang
45:11:200Michele De Carli: chickens. Okay, we have seen that the Dew Point temperature is more or less 15. Okay? Degrees. So if you if you work with the with the 1516 degrees as a supply temperature at the end, the local will be 18 degrees. I want to remind also you
45:31:800Michele De Carli: what I told you today, the Gypsu board usually is has a, as I told you, the number.
45:56:470Michele De Carli: So that means that even though there are, let's say, 10 cm, 15 cm from one pipe in the other distance, then in the 1 cm of depth or sorry of thickness of the dipsum board. You have a distributed
46:16:750Michele De Carli: the time. The the 2D effect. Okay, will be less than need that
46:26:730Michele De Carli: if you you, if you go with us. But let's say it's not better.
46:32:670Michele De Carli: as in the in the, in the flow, also because, okay, the temperature difference in the water side is
46:43:380Michele De Carli: 3 degrees. Okay? So it's not that much. So, considering they
46:49:60Michele De Carli: more homogeneous temperature difference on the water, and due to the low
46:54:740Michele De Carli: value of the lambda, the gypsum board on the surface. You have not so much difference. Okay, in the temperatures.
47:04:450Michele De Carli: Okay, anyway.
47:05:970Michele De Carli: 18 degrees for the active air.
47:10:740Michele De Carli: Okay, what about the walls, hey? For the ones. It's a little bit more.
47:21:460Michele De Carli: But we don't. Let's say, Okay, again, also for the walls, we have to consider that we need space to connect the pipes. Okay to the, to the, to the radiant
47:37:250Michele De Carli: honest
47:39:375Michele De Carli: so also, in this case the active area will be smaller than the overall area available on the walls. Okay, also, in this case, you can consider more, sometimes even less. Okay,
47:58:760Michele De Carli: now, what about the surface?
48:01:610Michele De Carli: But it's hmm.
48:03:660Michele De Carli: Usually. As you have experience with the radiator. Okay, you can have even high temperature
48:10:750Michele De Carli: meters in your house could have 60 70 degrees pay, and nobody complains. Right?
48:18:424Michele De Carli: In this stage that you think about that. It's not feasible as an editor, and it depends who is inside of the room. Okay, if you have elderly people or children who are not maybe able to
48:32:60Michele De Carli: react or to be, let's say,
48:38:310Michele De Carli: somehow, be aware about the the objects in the in the
48:45:633Michele De Carli: consider that they can get in contact for a long time with these services. Okay? And and if you if you stay in contact with this surfaces. Okay, then you are increasing service.
49:08:390Michele De Carli: So even if you have 30 40 degrees as surface temperature, if you are in contact, okay, or if your body gets in contact with the surface. Then this temperature could be even higher than get 50, 55 degrees, and it might burn, maybe not ripping, but burn.
49:28:830Michele De Carli: So in order to avoid complaints. Okay, what is recommended is on average, to have 40 degrees as much in order to avoid
49:41:340Michele De Carli: good in the minimum temperature.
49:51:510Michele De Carli: Also, these days, there is no
49:54:70Michele De Carli: minutes. Okay? And we can consider 18 degrees
49:59:340Michele De Carli: again, for issues related to the conversation. In this case the minimum temperature is related to the conversation, and the conversation
50:11:414Michele De Carli: could be considered could be avoided, or to be
50:16:320Michele De Carli: would not take place when we have 80 degrees surface.
50:23:00Michele De Carli: So overall, this is the we have just seen. Okay, we have said 2090 days for
50:42:760Michele De Carli: 20 degrees, 2020, 25 degrees for
50:58:80Michele De Carli: actually, there is something missing here. Okay, we said, 2020.20 is okay.
51:05:80Michele De Carli: But here is not okay. Okay. So let's say, 2020.5 is okay for pulling the
51:12:210Michele De Carli: the ceiling, the the sorry, the the floor.
51:16:70Michele De Carli: Okay.
51:17:576Michele De Carli: we have 35 degrees in the peripheral area. We could get at a lower temperature in the peripheral area. I didn't mention it. Okay. But since we are not
51:29:390Michele De Carli: okay
51:30:720Michele De Carli: of the time in the peripheral area of the floor cooling floor. We could also consider a smaller temperature for the floor. Okay, so the soft condition with the
51:45:680Michele De Carli: it should take place because we are not staying there for long periods of time.
51:52:736Michele De Carli: We said 35 degrees for heating
51:59:250Michele De Carli: in the okay. Sorry. Sorry. Sorry.
52:05:830Michele De Carli: So it's 35 degrees for the active area in heating. Okay? And 20. Sorry. 18 in cooling. Okay,
52:18:210Michele De Carli: we skip this. Okay. And for the active area for the walls, we have 40 degrees and 90 degrees.
52:25:920Michele De Carli: Now, we have.
52:29:460Michele De Carli: These are the surface temperatures. Okay, these are the indoor temperatures. And these are the overall heater transfer coefficient. Okay? So what we have to do is to multiply the H dot times, the temperature difference between the the maximum minimum
52:46:220Michele De Carli: temperature difference minus the temperature of the room. Okay? And of course, this is the absolute value. Okay, if we do like that in the case of heating, we have positive values, including we have negative values. Okay.
53:02:970Michele De Carli: so 29, minus 20 is 9 times 11, we get
53:08:670Michele De Carli: 100 watts per square meter. This is the maximum power specific power which can be delivered by irigan floor.
53:17:330Michele De Carli: In cooling, we have 20 minus sixes or minus 26. So it's 6
53:27:570Michele De Carli: degrees temperature difference times 7 is 40. Okay per square meter.
53:35:470Michele De Carli: Okay, the maximum specific load which can be extracted by the radiant floor. Okay, including
53:46:834Michele De Carli: in the peripheral area, we have 35 minus 20. So 15 degrees C, okay.
53:54:940Michele De Carli: which leads to 165 times 11 leads to 165 watts per square meter
54:06:570Michele De Carli: this is 7 temperature difference degrees. Temperature difference between the indoor temperature and the
54:15:100Michele De Carli: surface temperature times 7 is 50 watts per square meter in cooling. Okay?
54:23:170Michele De Carli: And for the let's go 1st on the wall. Okay? So for the active area of the wall, we have 40 degrees minus 20 is 20 degrees times 8 is 160 watts per meter. Okay.
54:41:87Michele De Carli: for the cooling area, active area, we have 26 minus.
54:49:960Michele De Carli: it's 8 right there. Okay, minus 19.
54:54:850Michele De Carli: Okay? Why, 19, we said, it is 18. Sorry.
54:59:00Michele De Carli: Okay, 18. So we have 8 times 8 is 64,
55:03:830Michele De Carli: 64 degrees. Okay. Sorry. 64 Watts per square
55:08:530Michele De Carli: for the ceiling. Okay, we have to consider.
55:12:990Michele De Carli: I told you the walls are not very much used. Okay, in practice. Okay? So most of the radiance ceiling are floor or ceiling.
55:22:260Michele De Carli: most of the radiance system. Sorry our floor for ceiling. Okay, so for the radiance ceiling, we have
55:29:710Michele De Carli: that for the active area we have 35, minus 20 is 15 times 6 is 90 watts per square meter. Okay.
55:40:930Michele De Carli: in cooling, we have 8,
55:44:380Michele De Carli: which is the difference between 26 and 18 times 11 is 88. Okay, Watts per square meter. Now we have 90 and 88, which is the active.
56:05:850Michele De Carli: So we have to multiply these values by
56:10:210Michele De Carli: 0 point 7, which is because the the 70%, the 70% per say the surface is just active. Okay, so
56:22:390Michele De Carli: what we have to consider is that if we multiply 90 times 0 point 7, we have 63 degrees. Sorry, 63 watts per square meter. Okay? And if we multiply 88, 90, let's say.
56:42:800Michele De Carli: times 0 point 7, we have 60 watts per meter. Okay, dear, we
56:54:600Michele De Carli: could divide by the overall its answer coefficient.
57:00:710Michele De Carli: And we this is the Delta T. So we subtract it, or we sum up to 20. Okay, so 63,
57:11:80Michele De Carli: divided by 6, okay, is more or less 10.5 degrees C day
57:19:840Michele De Carli: plus 20. So the average temperature of the row surface. See? Once again.
57:32:910Michele De Carli: is 30.5.
57:35:750Michele De Carli: Okay, so these values here they derive okay from the for the cooling. We have
57:47:800Michele De Carli: 60 divided by 11,
57:54:820Michele De Carli: which is more or less, I think 5.5 5.5. Yes, okay, 5.5, okay, plus
58:03:760Michele De Carli: or minus 2626 minus 1.5, we have 20.5.
58:11:320Michele De Carli: Okay, so the overall area efficient
58:16:990Michele De Carli: related once we center the active area.
58:21:870Michele De Carli: Okay, so the activated parameter, these are
58:26:120Michele De Carli: okay, fixed. And these are evaluated best based on considering 70% of active area against the overall
58:36:930Michele De Carli: available area.
58:45:310Michele De Carli: I can repeat it. Okay, most of them go wrong.
58:58:210Michele De Carli: Exactly. Not so much. Okay. All right, let's go.
59:05:930Michele De Carli: Okay, so this is what. So now, we have mentioned
59:15:680Michele De Carli: and specific capacity. Okay? And these are the limiting levels that we have.
59:24:90Michele De Carli: So we had now define which are the minimum maximum values of sorry.
59:33:670Michele De Carli: Anyway, the maximum flows that we can exchange with the rule specific flow, you know.
59:42:190Michele De Carli: Let's go and see what we should do as a 1st person.
59:46:370Michele De Carli: Okay, so I want to remind you that we have seen.
59:49:900Michele De Carli: which is the maximum power specific power which can be delivered.
59:57:740Michele De Carli: We have 13 h.
00:01:100Michele De Carli: Did that work.
00:02:360Michele De Carli: One room? Okay.
00:04:260Michele De Carli: The room is a certain lori. We divide the power, the design, power, heating and cooling.
00:13:310Michele De Carli: Buy this loaded here, and we compare the power
00:19:280Michele De Carli: with these values. Here we have said that this is the and pop pop the
00:27:460Michele De Carli: floor area. Okay, so we have
00:31:150Michele De Carli: 108, 140 watts per square meter in the occupied area we have for the overall area.
00:40:980Michele De Carli: We have 60 watts per square meter for
00:44:120Michele De Carli: the radiant ceiling. Okay? And we have this specific values for, okay, this is the floor. This is the wall areas, not the floor.
00:56:550Michele De Carli: Go ahead.
01:02:34Michele De Carli: Told you that the radiant one is not very much. Okay. Okay.
01:13:560Michele De Carli: So you have calculated. The peak load, you divide by a
01:24:700Michele De Carli: active area or the flu area. Okay, so you have the reference peak value so clearly.
01:33:160Michele De Carli: And you see, if this allows you to have comfort or Hello, everyone. Okay.
01:45:610Michele De Carli: if the specific power is smaller.
01:50:30Michele De Carli: if you're specifically explore these values, it's fine.
01:55:30Michele De Carli: Okay, your bandwidth will never reach the maximum. Every meeting
02:00:490Michele De Carli: that we're doing for you. It's fine
02:03:950Michele De Carli: and you can go on. You can go and save it.
02:10:808Michele De Carli: Okay, if you are not able to get this values. Okay?
02:23:595Michele De Carli: Well, you have different options. You can increase their self service
02:33:600Michele De Carli: for the radiant floor. Still, you have some.
02:38:900Michele De Carli: you can play a little bit on the peripheral area. Okay? Because you can increase a little bit. The temperature okay of the local temperature in the peripheral area. Okay?
02:53:820Michele De Carli: And how can you do that
03:12:472Michele De Carli: will allow you to have the required.
03:16:280Michele De Carli: It's for, anyway.
03:18:20Michele De Carli: Okay?
03:20:890Michele De Carli: Maybe not.
03:22:330Michele De Carli: Okay. But this is an option.
03:25:400Michele De Carli: But this just for the radiant floor. Okay, not for the radiant ceilings.
03:34:750Michele De Carli: Yes, of course you can improve the end a lot.
03:38:300Michele De Carli: But maybe question is, I can see, of course.
03:47:00Michele De Carli: And you could use an object, or
03:55:50Michele De Carli: if you are, you are seeing you can use the walls
04:01:450Michele De Carli: or an additional system like this, radiators. I told you that in North Europe, okay, that you can use this, the fin tube. Okay, which can be used
04:12:916Michele De Carli: for reaching the peak.
04:17:520Michele De Carli: Okay, before going on.
04:20:620Michele De Carli: Let's just make some considerations. Okay?
04:26:490Michele De Carli: General considerations. Okay, the general considerations is, are these ones here? Okay.
04:38:615Michele De Carli: so here.
04:44:260Michele De Carli: why are Median system interesting? Because by working with low temperature, by having low temperature. What I want to highlight is
05:02:770Michele De Carli: that for for heating? Okay.
05:10:770Michele De Carli: 100 watts per square meter is a very high value. 100 watts per meter. Right? It's a local value, but it's
05:27:300Michele De Carli: 5 by 3, which is the usual 5.
05:32:590Michele De Carli: That means
05:40:00Michele De Carli: more or less 30, 35 watts per cubic. S.
05:46:210Michele De Carli: Power. Okay. Per volume. Tell you, if you remember, okay?
05:53:10Michele De Carli: we said that on average we have 20 watts per kilometer. But this is the average locally. You can get these values, as you will see. Maybe.
06:08:00Michele De Carli: What about
06:12:940Michele De Carli: this value here, 60 watts, procurement. Oh, sorry.
06:18:650Michele De Carli: Scrubbing through
06:27:410Michele De Carli: me.
06:33:680Michele De Carli: okay in this case, you can see that
06:37:430Michele De Carli: of course that's A, 20 lots per square meter.
06:42:80Michele De Carli: But in a new building. Okay? So in a well sweaty building wall, sorry radiance ceiling can work.
07:01:90Michele De Carli: I want to highlight also this number here. The radiant scene.
07:06:30Michele De Carli: Okay, proceeding the role.
07:10:120Michele De Carli: So Facebook, we have 16 lots per.
07:14:830Michele De Carli: Okay. I told you already that 60 watts per kilometer is usually the limit. If we want to pull a building with an efficient solution, we have seen it with the chip beams, and we can see that again. We have the radius system. The same. Okay, what does it mean? It means that basically, the radiant ceiling performs better than the radiant floor.
07:39:270Michele De Carli: Okay, but you have to work on the shading windows in order to have, anyway, a reduced
07:49:400Michele De Carli: specifically okay, which is 60 watts per square per square.
07:55:410Michele De Carli: Okay?
07:57:590Michele De Carli: Summarizing the best solution for him is for sure.
08:05:30Michele De Carli: The radiant floor is still okay, but is limited. Okay, see?
08:11:630Michele De Carli: Oh, no. They're us special uses of the regular floor. Do you see?
08:21:120Michele De Carli: In a office building.
08:25:569Michele De Carli: Where are you at value for the and it's okay.
08:39:930Michele De Carli: And since, or thanks to the very good insulation of the building with, although the he transferred to efficiently.
08:54:550Michele De Carli: Listen.
08:57:270Michele De Carli: Okay. So you can see that that
09:04:760Michele De Carli: these these are general. The same rules.
09:07:720Michele De Carli: Okay, of course, to get 60 60 Watts per minute.
09:15:790Michele De Carli: Hey?
09:16:970Michele De Carli: Brilliant, chilly!
09:18:720Michele De Carli: That means that your temperature of the water will run value than a useful.
09:26:750Michele De Carli: which means that the cop of the heat pump will be smaller relatively today.
09:34:240Michele De Carli: regular flow. But it will be greater than a faculty.
09:42:790Michele De Carli: Look at 45. Okay. In this case we will work. Let's say, 35, 37 degrees. And should like that.
09:52:180Michele De Carli: Okay, okay, so we say that we are able to fulfill the people
10:06:130Michele De Carli: load. Okay, let's let's let's now focus on the heating. Okay, but are you okay?
10:17:250Michele De Carli: So how can I calculate? Now, how can I choose the system?
10:23:900Michele De Carli: Choose which pipes the the amount of insulation which concrete the the the layer. And so.
10:34:330Michele De Carli: okay, so if we have a
10:38:770Michele De Carli: well, the 1st method is to run a full 2D simulation. It's crazy. But you can do that. Okay.
10:45:400Michele De Carli: the second option is to work with this simplified method, which is simplified. But anyway, it's anyway.
10:53:670Michele De Carli: you can develop it. Okay, the the standards
10:57:550Michele De Carli: allows you to make the calculation. Okay, but it's a little bit complicated.
11:03:470Michele De Carli: There is a term method where what is based on it is based on a regression, a question
11:14:10Michele De Carli: based on many simulations done today. Okay? And with this regression equation
11:24:400Michele De Carli: by fixing or setting the geometrical properties and the determined properties of the material. You're able to set up your cement checker to select your gradient frame.
11:38:920Michele De Carli: There is a 4th way to use a certified language
11:49:480Michele De Carli: from a test with certified test.
11:54:620Michele De Carli: The room is the same as the radiators. Okay, in this case, in this case, you have the specific power delivered for any temperature difference between the water and the
12:10:810Michele De Carli: of course this is used for
12:16:660Michele De Carli: prefabricated elements. So for radiance ceiling, this is the way you do the select. Okay? Because, as I told you, the radiance ceiling are produced
12:28:800Michele De Carli: off site and they are delivering their side.
12:31:350Michele De Carli: Okay? And and once you have tested one of them, you have maybe 2 or 3
12:39:410Michele De Carli: sizes. Okay, through 2 or 3 surfaces, and you had 2 or 3 curves.
12:45:260Michele De Carli: Okay, for the radiant flows which are produced and and beautiful side.
12:55:500Michele De Carli: This is the most interesting, don't.
12:59:870Michele De Carli: which is a matter, but we are
13:02:610Michele De Carli: so. What is this is this mask black box
13:06:210Michele De Carli: based on this regression based on calculation date.
13:12:800Michele De Carli: So, now, what should we do
13:20:810Michele De Carli: that we should consider. Okay, the
13:29:330Michele De Carli: Decorative distribution of the water.
13:35:200Michele De Carli: and we have to consider that the specific power which is delivered by the system is the kh, okay? So the heat transfer overall heat transfer coefficient between the water and the rule and the delta
13:56:560Michele De Carli: data mean logarithmic, then, the mean logarithmic temperature difference. Okay? Which is the usual
14:06:310Michele De Carli: which is defined as usual. Okay for heating and for cooling. Okay? So in heating, we have. The water is
14:14:560Michele De Carli: cooling by releasing the heat to the room
14:17:690Michele De Carli: in in cooling the water is heated up by absorbing the heat of okay.
14:29:400Michele De Carli: And in this case we have 2 different heat exchange, coefficient exchange, coefficient in heating and in, and also different
14:40:959Michele De Carli: Delta, theta logarithmic temperature. Okay? Because we have different delta T on the water side. Okay? And different temperature to this. So the Delta th delta, theta H delta, theta C, they are different, because the supply and return temperature of the water are different, and because we have different temperatures of the roads. Okay?
15:05:730Michele De Carli: And also the heat exchange proficient on the server. That's really
15:12:630Michele De Carli: so. We have seen that radiant law has a better exchange coefficiency and radiant wall has a better
15:22:750Michele De Carli: if exchange perficiary, you mean 10.
15:25:440Michele De Carli: Right? So the the parameters, I think
15:33:620Michele De Carli: so. What you should do is, basically, you have to
15:37:600Michele De Carli: calculate the specific power. Okay, which has to be delivered by the system. Okay, and the
15:49:260Michele De Carli: and based on the power that you need, or you, you want to
15:54:610Michele De Carli: the liver. Okay, you will have the surface. Here. You see, for instance, the sizing of a radiant seeing. Okay, this is the the infant case. Okay.
16:07:163Michele De Carli: at the beginning. I I don't think is right now. The the the final setup. Anyway, it doesn't matter.
16:15:838Michele De Carli: Okay. So in this case, you can see that. Of course, you have to define the
16:24:280Michele De Carli: specific power. Okay?
16:28:160Michele De Carli: And then here we are missing. MA, okay, the area. Okay?
16:35:330Michele De Carli: And the power is also okay, delivered by the water flow rate. Okay, must flow rate times the temperature difference of the supply in return.
16:47:460Michele De Carli: True. Okay.
16:52:520Michele De Carli: If you have a prefabricated solution.
16:56:260Michele De Carli: Kh, and Kc, okay? As well as Delta. P. Okay. In the different radiance system.
17:06:140Michele De Carli: they are provided by the manufacturer. Here, you see? 2, let's say, the-the-,
17:18:200Michele De Carli: the overall transfer. Coefficient. Okay of the radiance ceiling. Okay.
17:23:730Michele De Carli: that are derived for elaborator. Okay, so here. You see, this is the the specific power in what's per square meter in heating and in cooling. Okay.
17:37:340Michele De Carli: this is the temperature of the water
17:41:60Michele De Carli: supply temperature of the water. Okay? Of course.
17:44:500Michele De Carli: in this case you don't have to make calculations and
17:52:460Michele De Carli: lingo logarithmic temperature. Okay? Because the the tests have been performed by setting up a certain supply temperature. Okay?
18:03:432Michele De Carli: So you can see that basically
18:05:710Michele De Carli: in in cooling, you can see that if you supply
18:10:130Michele De Carli: with 15 degrees the temperature of the water.
18:15:240Michele De Carli: You can see that you have
18:17:990Michele De Carli: more or less 80 watts per square meter.
18:31:370Michele De Carli: 88. Okay? So you can get even 88 watts per square meter with
18:37:780Michele De Carli: 14 degrees or 13 degrees as supply temperature of the wood.
18:42:490Michele De Carli: Okay?
18:47:480Michele De Carli: Then you have to consider the 70% okay, or the active area.
18:54:630Michele De Carli: This is okay, the the related to the active area.
18:58:230Michele De Carli: for instance, if you supply, if your supply temperature, the water is 35 degrees. You can see that you can get almost
19:06:570Michele De Carli: 55. Okay, Watts per square meter. But if your room required.
19:16:90Michele De Carli: then the speaker remove this thing that, mister?
19:23:910Michele De Carli: Once per second. Okay, so 30 watts per kilometer, which is here that can be provided by
19:35:780Michele De Carli: 2728 degrees as supplied.
19:41:750Michele De Carli: Let's see that the supply temperature. So let's say 28. So with the supply temperature to the 20 degrees
19:49:870Michele De Carli: in the radiance ceiling, you're able to hit the room.
19:54:450Michele De Carli: Okay?
19:57:600Michele De Carli: Yes.
20:15:890Michele De Carli: no, no. If this, this is active, this is active.
20:20:170Michele De Carli: Okay? Yes, of course, because these 10 works.
20:27:270Michele De Carli: if we have.
20:30:550Michele De Carli: if we have 10 watt perimeter in the overall area. We divide by 27. So we have 1.3. So 1315, let's say 15 watts.
20:42:300Michele De Carli: Sorry.
20:45:960Michele De Carli: 40. Okay, so 40 watts per square meter.
20:50:830Michele De Carli: It's 30 to 33. Okay?
20:56:117Michele De Carli: Yes, it looks like to to
21:01:350Michele De Carli: too cold. The temperature for heating a room with a radiant scene. Okay, anyway. Heck.
21:15:790Michele De Carli: Complicated to explain. Okay, maybe if we have time I will explain tomorrow. Okay, but it doesn't matter.
21:22:220Michele De Carli: And yes, this is the last slide for today. Then tomorrow we are going to see a a.
21:31:300Michele De Carli: That, and that the and the the Sd sheet that you have to use.
21:38:910Michele De Carli: So also in this case, this is is here. The area is missing. Okay, sorry.
21:46:700Michele De Carli: In this case.
21:50:570Michele De Carli: Still, you have to the file. The Kh. And Kc. But you are building on side the system.
22:01:590Michele De Carli: So you are design selecting, which is the 5 spacing? How many secrets? And it's on
22:10:936Michele De Carli: depending also on the finishing material on the type of
22:16:813Michele De Carli: would be the same everywhere, because you will not have steps. Okay? So the the
22:27:680Michele De Carli: you will try to select the finishing material with the same thickness. Okay? And usually the thickness of the screen will be the same everywhere. Okay, the insulation thickness will be the same everywhere. Okay?
22:43:950Michele De Carli: And what you are mainly deciding is the diameter of the pipe. Once you know, the thickness of the screen, the diameter of the pipe
22:55:400Michele De Carli: by spacing, and of course, then you will have to check the Delta P in order to select, if you are to choose. If you have if you want one or more secrets in a day.
23:09:400Michele De Carli: Okay, so in this case.
23:12:740Michele De Carli: in the case of regular ceiling, Kc. And KH. Are calculated or are provided by the manufacturers. Okay, because they are pre translated
23:23:900Michele De Carli: systems.
23:25:270Michele De Carli: In case of radiant floors, you have calculate because you are the designer, and you have to select
23:34:140Michele De Carli: which type of release, of course, together with the architect, it's
23:42:130Michele De Carli: respect. But then you have to select the type of system. So with that.
23:49:290Michele De Carli: the meter and the type of pipe sorry and the pipe spacing
23:58:80Michele De Carli: in order to get the specific power that is needed in this.
24:03:290Michele De Carli: Okay?
24:05:560Michele De Carli: Okay? And then we will see tomorrow the how to calculate this simplified distribution method, the sizing, how to size the gradient. Okay.
24:17:820Michele De Carli: good. See you tomorrow.