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00:11:490Michele De Carli: Okay, so…
00:12:850Michele De Carli: Now that we have seen everything, especially how it's distributing, you know, we will have a look on how to size the air terminal device, okay? So we are going to see how to size the air terminal device, so how to select the
00:28:330Michele De Carli: the type of system and the… how many of them in the position, okay?
00:35:120Michele De Carli: And then, once we finish this, we go into the sizing of the overall length, okay, which is part of the…
00:44:210Michele De Carli: of the group work that you have to do. By the way, we will publish, okay, the groups you can fill in, okay, you can…
00:54:970Michele De Carli: I don't remember exactly how many. I will… I will check it, I will… I will write a new bill, okay?
01:00:30Michele De Carli: I think the groups were…
01:03:510Michele De Carli: Three versions per group, okay. So last year, we had 13 groups, okay? You have, of course, different,
01:13:970Michele De Carli: Different problems, okay, so…
01:16:630Michele De Carli: There is no chance to copy one each other, okay? And we will also provide you, okay, this Excel tool, which will be oversizing the distribution system, okay? But this is something that we are going to see next week, okay? But we will open the…
01:34:570Michele De Carli: groups, okay.
01:38:450Michele De Carli: I don't know exactly when.
01:41:250Michele De Carli: Soon, okay? And then, on Thursday, okay, we are going to…
01:46:490Michele De Carli: tell you how to do the sizing, okay? So, now I'm going on the air terminal device sizing. Next week, we finish the ventilation part, okay? The air systems with the sizing, the general, okay, sizes of the
02:04:800Michele De Carli: The theory of generalizing of intoxicate.
02:10:09Michele De Carli: And, so I will be quite,
02:14:680Michele De Carli: brief, okay, but then we will have… you will have the deeper, lecture, okay, on Thursday, okay, with the door, on how to… we will explain more in detail the sizing, and also how to work with the tool that you have.
02:33:150Michele De Carli: Okay?
02:35:350Michele De Carli: Alright, so… This is an example, okay, of a room. Okay, the room is…
02:47:520Michele De Carli: 18 meters by 40 meters for area, okay, which means
02:53:180Michele De Carli: 250 square meters, where I have 60 persons inside, okay?
02:58:390Michele De Carli: the meditation rate is, according to Alexandra. It's very different to such a person, okay?
03:07:210Michele De Carli: The volume is 900 kilometer or less, because the height is 3.5, okay, so the mass height is 3.5.
03:19:410Michele De Carli: In this case, you can…
03:23:680Michele De Carli: You can calculate the volume per liter, which is 60% times 10 liters per second, times equal 6, the conversion coefficient for going from liters per second to…
03:39:640Michele De Carli: kilometers per hour, okay? So 2200 degrees per hour, and then the rate is the volume at the fluid divided by the volume of the 2200 divided by
03:53:930Michele De Carli: Which is 1.5 millivolt, air changes per hour, okay? All right.
04:00:50Michele De Carli: Look.
04:01:400Michele De Carli: Alright, now, I give… Approximately, okay.
04:11:160Michele De Carli: based on my feelings, okay, I give a good, let's say, a good envelope for winter, so we… we said, okay, when we saw the load, that if we had a good enveloping winter, we could expect good.
04:26:550Michele De Carli: 10 watts per cubic meter as power, okay, SP power for the heating, okay? Which means that you can extract more as 9 kilowatts
04:36:90Michele De Carli: 4. Dave doesn't show up. Dave?
04:39:200Michele De Carli: In cooling, okay, I told you one figure usually is to keep the cooling load, if possible, okay, below 50 watts per square meter. Okay, this is the usual cooling load that we might have.
04:52:700Michele De Carli: Okay, so these are two typical figures that you have to keep in mind, okay? So 10 watts per cubic meter.
05:01:470Michele De Carli: wood quantity.
05:02:950Michele De Carli: a relatively good quality building, okay? What is for the building. If it's not the… what is rapid building, how much would be the specific power it was per kilometer here in Palomar?
05:13:670Michele De Carli: 30? Okay.
05:15:100Michele De Carli: And you said 30. Sweet. Yeah. Yeah, 30 is a little bit,
05:19:220Michele De Carli: But plenty is okay. 20 words in a cold front.
05:23:830Michele De Carli: So, 20 was per cubic. Of course, you could have even greater amount of good reliability load, okay, depending…
05:31:890Michele De Carli: I don't know if you did the Korean method, but how many of you did the carrier method?
05:37:980Michele De Carli: Is your name? Okay.
05:39:580Michele De Carli: But we changed it.
05:41:820Michele De Carli: They manage your load that you have.
05:45:120Michele De Carli: drones?
05:46:710Michele De Carli: Okay, so depending on how well you're shaving, okay, the room, you could have higher or lower solar radiation underneath, solidifying, which use
06:00:60Michele De Carli: Okay, so 50 is okay, because as you receive, 50 water square meter is usually telling me below which you could use some efficient solution, okay, as you will see when you will see…
06:15:120Michele De Carli: the terminal devices, okay. Of course, sometimes you might have 70, 80, okay, work per square meter.
06:22:680Michele De Carli: Okay, anyway, I expect to have 50 watts per square meter, which means around about 13 kilowatts of
06:32:150Michele De Carli: So, now, what, has you received with a question?
06:39:50Michele De Carli: Manitoba, we are going to work with oil systems, okay? So we want to provide heating and cooling just with the air.
06:47:350Michele De Carli: So we want to calculate which is the theoretical delta T that we need to provide in order to use the flow rate that we have calculated. Okay, so this 200
07:00:540Michele De Carli: 2000.
07:02:70Michele De Carli: 160 cubic meter per hour. This is the flow rate just for fresh air. We want to check… so the first point is to check if the just
07:13:590Michele De Carli: Sorry.
07:14:500Michele De Carli: If just by working with fresh air, it is possible to fulfill heating and cooling needs.
07:22:70Michele De Carli: Okay?
07:23:470Michele De Carli: So, we… what you have to do is to work on the usual equation, and CP, N dot CP,
07:32:150Michele De Carli: temperature supplied, so the inlet temperature minus the air temperature of the room, okay? So 20 in winter, 26 in summer, okay, and this is the power that you need in the room, okay? The air temperature is known. Here, no.
07:48:930Michele De Carli: prorator, okay? So, by using the rope, and by converting hours into seconds, you have the mass prorating, kilogatts per second, okay?
07:59:640Michele De Carli: So this is known, CP is known, it's 1,000, okay, 1 kilojou per kilon per kilon here, okay? And, no, we know the power, because I just put the power in the next side, okay? So, what you do is, basically.
08:15:900Michele De Carli: The delta T is the power divided by the maximum rate, and the
08:21:210Michele De Carli: specifically out in there, okay? So…
08:25:300Michele De Carli: 90 watts, or 9,000 watts, divided by 2,160, which are the cubic Newtons per hour, times the raw, okay, so this is…
08:36:780Michele De Carli: What?
08:38:159Michele De Carli: Okay, so let's… I will do that here.
08:40:429Michele De Carli: Watts divided by cubic meters per hour.
08:44:480Michele De Carli: Okay.
08:45:760Michele De Carli: 3,600 seconds per hour.
08:49:370Michele De Carli: Okay?
08:50:510Michele De Carli: The, density, 1.2, is kilograms.
08:54:990Michele De Carli: Per second. Sorry, cubic cubic meter.
08:59:930Michele De Carli: Okay, and you have the CP of the year, which is Joule kilogram.
09:07:920Michele De Carli: Calvin, right? So we have…
09:10:450Michele De Carli: Joule per second, watts, hour, hour, cubic meter, cubic meter, kilogram, kilogram, so we had, okay, just the… Right?
09:21:650Michele De Carli: Okay.
09:23:250Michele De Carli: So, if we divide the peak load for ripping by the maximum rate and the specificity to it, 12.4. So, it means that we need to supply air 12.4 degrees
09:39:780Michele De Carli: At 12.4 degrees temperature greater.
09:44:170Michele De Carli: So, we consider 20 degrees C as air temperature, which means, okay, supply air at 32.5.
09:54:980Michele De Carli: Which is reasonable, okay? We told… we said that up to 35 degrees C, okay? We could accept to have, okay, supply the air temperature, which does not make too much stratification in there, okay?
10:14:420Michele De Carli: Okay, so, in principle, you can see what we have also seen in the… in the… in the…
10:24:650Michele De Carli: Did you see that? Yes, when we made the samples, okay, we have seen that once you have a good envelope, okay, in winter, you could fulfill the requirement by a fire system, okay?
10:36:810Michele De Carli: Without exceeding in the temperature of the supply.
10:41:540Michele De Carli: Okay?
10:43:200Michele De Carli: No.
10:44:340Michele De Carli: We can see that here we have, 50% more greater power in green than anything.
10:52:770Michele De Carli: Which is normal, okay, especially in new buildings. So, new buildings, the problem is cooling, not heating, okay?
10:59:890Michele De Carli: And, in this case, by working with the same equation, I don't repeat the… B.
11:10:480Michele De Carli: It shows okay, and I'm busy.
11:12:260Michele De Carli: the dimensional analysis, we can see that in this case, due to the… I mean, nothing changes but just the power, because we are working, we're trying to work in the same temperature, which is the fresh air through it, okay?
11:28:90Michele De Carli: And in this case, of course, we have 50% greater power, which means 50% greater delta T, okay, between the supply and air. Of course, in this case, we are supplying air at lower temperature than the roof.
11:41:670Michele De Carli: So it means that here we need the 18 degrees C, okay? If we make 26, minus 18…
11:50:570Michele De Carli: Okay, we have 8 degrees. We cannot provide air into the room at 8 degrees. Okay, so we need to increase the air, which means that,
12:02:580Michele De Carli: We have to work.
12:04:800Michele De Carli: on the macro rate. In order to reduce the delta T, we need to increase the mass flow rate. And in order to increase the mass flow rate, we need to increase circulation. Of course, we could try to
12:18:460Michele De Carli: That, not downloaded to…
12:21:910Michele De Carli: To lower… to lower the peak loader, okay, of cooling, okay, but it might not be…
12:30:00Michele De Carli: Possible, okay? And already we reached a good cooling now. 51 per cubic per square meter is already through a good cooling.
12:39:350Michele De Carli: So, so we have to increase the air circulation, the air, so what we do, we fix the delta T,
12:48:460Michele De Carli: at 10 degrees C, because we can… we cannot supply air at lower temperature than 16 degrees C, so that the temperature difference between 26 and 16
13:01:800Michele De Carli: prior… 16, okay. 26. The maximum entrance that we might have is 10 degrees.
13:09:730Michele De Carli: Okay, so we fixed this factor.
13:13:750Michele De Carli: We use the same equation, okay, but in this case, we want to find the mass flow rate as resulting, okay, from the peak power, 13 kilowatts, divided by the
13:27:560Michele De Carli: CP of the air, okay, so CP… dying, so…
13:33:130Michele De Carli: The power divided by the delta T.
13:36:80Michele De Carli: And the CP, okay, and the CP leads to the mass flow rate in kilograms per second, okay? So this is the resulting
13:47:830Michele De Carli: Mass flow rate, if we want to translate this into…
13:53:470Michele De Carli: volume for rate, because we have an extraction that's 2,160 cubic meters per hour. We can do that by dividing by the
14:03:310Michele De Carli: density, okay, so here we have kilograms per second. We divide by the density, which is kilogram per cubic meter, okay, and then…
14:11:830Michele De Carli: we divide by, we can use the seconds in power, okay, so that we can have the volumet for rate in meter cubic meters per hour, okay? So that leads to 3,870 cubic meters per hour.
14:29:790Michele De Carli: Which means 4.4 engine trains. Okay, so the fresh air
14:41:120Michele De Carli: Wars.
14:42:290Michele De Carli: elaborate.
14:43:530Michele De Carli: sorry, 2,060 cubic meters per hour, okay? We need to supply 3,930 kilometers per hour. It means that you need to reciprocate 1,700 cubic air.
14:58:860Michele De Carli: Okay? So, in this case, we are sizing the
15:05:10Michele De Carli: Supply air fluoride, okay, which will be the maximum between the Sorry.
15:19:610Michele De Carli: We have selected the airflow rate of 3,870, okay, which is greater than the Then the fresh air.
15:32:60Michele De Carli: Okay, so that is the flow rate that we need to use for sizing the air panel devices, but this will be also the airflow rate that we
15:43:640Michele De Carli: We'll use for this branch, okay, for this… for the duct that is, okay, is…
15:51:640Michele De Carli: Bringing here this volumatic fluid, okay? And we need to do that room by room, and then we have to add the
16:00:700Michele De Carli: volumetiferate in the common branches, okay, in order to size the main secondary branches, whatever.
16:08:210Michele De Carli: Okay?
16:09:740Michele De Carli: Okay?
16:11:50Michele De Carli: So… Now, we are going to look at That's okay.
16:16:870Michele De Carli: Now we are going to look at the air distribution in the room, and so we are just looking at, let's say, what happens here, okay? Then, next week, we are going to see how to consider the size of the dots, okay?
16:33:110Michele De Carli: Alright, so, so…
16:37:430Michele De Carli: we then have to supply 3,900 cubic meters per hour, okay? So we can supply this air with 4
16:46:620Michele De Carli: We could use sinks, okay?
16:51:80Michele De Carli: All we could use for research time, okay, I just put three values, okay, just to…
16:58:460Michele De Carli: It is just to consider. I could even put to 8, okay, it doesn't matter, but that was just to show you, okay, of course, if we use earlier in, let's say, in this case, we have that each,
17:13:470Michele De Carli: airtime in a device has to deliver around about 12,000 kilograms per hour, okay?
17:20:540Michele De Carli: It'll be so noisy. Sorry, it will be so noisy.
17:24:530Michele De Carli: the noise, and the… It could be, could be, yes, of course. It depends what's on the handle. Depends on the hand return.
17:31:960Michele De Carli: Okay, so now the room on the density of the people inside, so…
17:37:680Michele De Carli: We could use 6 air inlets, which is, then 650 cubits per hour. If we use 10 air inlets, okay, maybe 39, 39, 390 cubits per hour.
17:50:490Michele De Carli: So, let's consider an internal heat level, which is 6mm inlets. So, let's consider that each air terminal device should deliver 645 cubic meters per hour, okay? So, I will just introduce this slide, and then we come to this… to this point next slide, okay?
18:10:440Michele De Carli: So, first of all.
18:14:180Michele De Carli: Let's consider that we are, okay, we would like to, or we want to use, like, in this case, okay, supply from the, from the city. Okay, so in this case, I can consider this,
18:30:660Michele De Carli: And I moved here, okay.
18:32:700Michele De Carli: Good quality person.
18:36:520Michele De Carli: Sorry?
18:37:880Michele De Carli: 650. Yeah, so 650?
18:43:690Michele De Carli: Excellent.
18:44:930Michele De Carli: Beautiful.
18:52:120Michele De Carli: I see how many.
18:53:980Michele De Carli: Okay, okay, okay, sorry, yes, okay, we come back to this point tomorrow. So, okay, so here, I would like just to show you, okay, these are the different, so these are the pictures that we have seen yesterday, okay?
19:09:230Michele De Carli: Of the technical machines, okay? And, okay, I would like to remind that it doesn't matter if you use a circular or parallel inlet, okay, because they're dissimilar.
19:22:60Michele De Carli: Okay, it's just a question on the architectural, okay? Of course, you have to remember that you need also to consider the height of the city, so the 2.5…
19:35:210Michele De Carli: The 3.5 meters that have been used for the
19:39:440Michele De Carli: height, okay, this is, okay, the net height, okay? So, considering, then on top, you have to put the force, sorry, the full ceiling, the full ceiling,
19:52:330Michele De Carli: volume or height, okay? So, the differential of the plane should consider depth of the force.
20:00:980Michele De Carli: Okay? Not a sexual constraint, okay, that you should consider.
20:06:850Michele De Carli: And… And now we can, we then stop and see on Tuesday. This is, okay, the, what you can get, okay, from the technical sheet. So you can see that you have the,
20:24:760Michele De Carli: you could have a different arrangement of the distribution system, okay? So you can arrange with… in this way, or in this way, okay?
20:39:720Michele De Carli: And you can see here, you have the dimensions, okay, so besides the dimensions of the system.
20:46:700Michele De Carli: Here, you see the thickness of the spring, since we are… in this case, we are working on a seam attached string. So, in this case, the drop
21:01:360Michele De Carli: is, limited, because due to the conduct, okay.
21:06:350Michele De Carli: the… the… the stream will be mainly, okay, on the ceiling side. But you can see that you have the… the… the thickness, okay, you… you have here, the thickness of the… and this is the thickness, okay, of the…
21:24:420Michele De Carli: of the stream at 0%, or at 10 Kelvin, okay? 10 Kelvin difference, 16, 26, okay?
21:36:90Michele De Carli: And of course, I told you.
21:40:440Michele De Carli: The level, the acoustic level, the power level of the air… the air dynamic.
21:48:840Michele De Carli: Okay?
21:53:530Michele De Carli: And… they…
21:56:10Michele De Carli: out of the room, okay, and of course, the occupied room, which is 1.8 meters, okay, which is the head of a person.
22:05:550Michele De Carli: All right, so we meet again on Tuesday, we have to see.
22:11:280Michele De Carli: How to select test size, which are the mains, let's say, the main constraints and parameters.
22:18:960Michele De Carli: And, and issues that have to be considered, okay, when sizing an air taping a device. Okay!
22:27:10Michele De Carli: Have a nice weekend, and see you on Tuesday.