Assistente AI
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00:04:960Michele De Carli: We can start.
00:14:30Michele De Carli: You all right. So we.
00:24:230Michele De Carli: we have been talking about the.
00:28:310Michele De Carli: the, the integration systems. Okay? And how we
00:34:100Michele De Carli: what is related to the air in side of A
00:39:330Michele De Carli: of the of an Hnc system.
00:42:965Michele De Carli: And now we will talk about the terminal use. So we go into the water based solutions okay, into the hydronic system. So to make a cup, we have seen how to calculate the load.
00:59:230Michele De Carli: what is necessary in terms of peak
01:03:300Michele De Carli: power for heating and cooling, how to calculate more or less the energy. We didn't go into detail about that. And then we started with the the ventilation system. So the the
01:15:680Michele De Carli: the VR of Hvac. And now we are going to look into the hydraulic systems. Okay? In general, we can talk about terminal units. So not only about hydraulic system, so we will focus mainly on hydraulic system, but we are going to see the so-called terminal units. So to make a summary so some of the of the of the of the
01:44:890Michele De Carli: topics that we are going to do in this, let's say, introduction
01:53:790Michele De Carli: between today and tomorrow is something that we have already seen. But I mean, we can. I mean.
02:03:210Michele De Carli: recouple it a bit in case. So basically the the types of plants that we are
02:14:50Michele De Carli: that we have for heating and cooling buildings are mainly subdivided into, let's say, either the type of heat carrier fluid or the types of service. Looking at the type of service. Okay? Because it's easier. And and it's it's quicker. Okay? Also, because
02:39:280Michele De Carli: I don't know we have till 10 min.
02:44:930Michele De Carli: so the type of service, of course, we could just hit our building.
02:50:372Michele De Carli: Okay, you have to think about also that we are talking about in general, about also different climatic condition, not only the ones here in Padua, but in principle you might have just heating, especially in so-called heating, dominant climates. So climates, which are mainly where the most important energy required by the building is heating.
03:20:850Michele De Carli: We can have just cooling in case of work premise
03:26:420Michele De Carli: like tropical areas, or even let's say, in yeah, where where we are, we have almost
03:35:220Michele De Carli: warm condition or year long, or we can neither heating and cooling so we could have. So as here, for instance, or let's say, any location, let's say, in the Mediterranean zone, or wherever
03:53:870Michele De Carli: in, in other places. In any case, we could just hit just for both. For the heat carrier fluid.
04:02:970Michele De Carli: We have seen the the full air systems. Okay, all air plants.
04:11:410Michele De Carli: We have. we can have in this case, as we have seen. We have
04:19:874Michele De Carli: to move air in the rooms, and this air is facing the heating and cooling load of the
04:27:115Michele De Carli: we could instead have water based systems, for instance, as you have
04:32:940Michele De Carli: probably in your house. And in this case you have water, which is
04:41:800Michele De Carli: providing anything. Usually when you have radiators. You have a a water-based solution.
04:49:13Michele De Carli: As we will see, you can have 2 pipes, we meaning that we have one pipe line for supplying one for the return, or we could have 4 pipes. 4 pipes means that we we provide
05:05:260Michele De Carli: 2 supply and 2 returns, usually
05:10:300Michele De Carli: for meeting and cooling at the same time or
05:14:230Michele De Carli: not. Not contemporary. But let's say, if we can have
05:20:250Michele De Carli: need for heating and cooling the building. Okay over one day or over one month. Then we can either
05:29:540Michele De Carli: we we have one supply return line for heating and one supply return
05:36:970Michele De Carli: line for cooling. Okay, and they are
05:39:820Michele De Carli: always feed it. Okay, with warm or chilled water.
05:45:234Michele De Carli: But I mean, we will see that. Okay.
05:49:383Michele De Carli: so what are the base system means that we have
05:53:420Michele De Carli: just water and air is just due to airing or natural integration.
06:02:263Michele De Carli: We can have a mix of these 2 systems, okay, like air and water plants as we have here, for instance, in our room
06:10:130Michele De Carli: in this room you can see we have the ventilation, but we have also the water based solution, the hydraulic, which is this one here? Okay, so the air is is
06:25:120Michele De Carli: responsible for the Latincloth for the vocal balance in order to keep the relative humidity.
06:32:980Michele De Carli: the summer and low in winter, and the water is instead responsible for the heating and cooling load.
06:42:400Michele De Carli: As
06:45:446Michele De Carli: we go to the 5th one. Okay, which is what you have most probably also in your in your house.
06:52:190Michele De Carli: Direct expansion systems are systems where the refrigerator is sorry. The refrigerator and fluid is either condensing or evaporating in the room directly. Okay? Why, that is why it's called direct expansion. Okay, in principle, there is not so much difference
07:15:510Michele De Carli: with respect to these systems here. Okay? Because usually
07:19:506Michele De Carli: you use, anyway, a thin coil. Okay? And you have a fan moving the air. Okay? But in this case, inside the pink coils, you have water.
07:29:800Michele De Carli: Okay? In your house you have a refrigerant fluid. So when you switch on your speed system, your air conditioning. There is the refrigerant inside which is evaporating in summer for cooling your house or condensing if you want to use it as heat pump in mid season for heating the rooms. So these are the direct destruction systems which can be easy, like the residential applications are more complicated. Okay?
07:59:580Michele De Carli: And then we have another type of system which
08:03:650Michele De Carli: is used for heating purposes only any. They are the so-called high temperature radiance systems which are
08:12:810Michele De Carli: not so much common anymore here in Italy. But they're very much used in other countries. Okay?
08:20:585Michele De Carli: Where you need hitting. Okay, like
08:26:234Michele De Carli: any I mean outside you outside the European Commission. It is. They are already used. Okay, especially in programs like in I don't know Easter or Middle East, even like in Iran or Russia or
08:47:130Michele De Carli: Kazakhstan. And so
08:50:820Michele De Carli: they are used for heating. Okay? And they are suitable for, let's say, large spaces, large volumes, and also open or semi-open conditions. Okay, as we will see.
09:03:586Michele De Carli: Okay. So to risk to recap
09:08:290Michele De Carli: all air plants, water dissolution, air, water plants, high system and direct special system.
09:15:90Michele De Carli: So about these 2, we just
09:18:950Michele De Carli: we will just, I mean, go very quick on them. Okay, we are mainly. We have already worked a lot or sorry talked a lot on
09:31:460Michele De Carli: ventilation system molar plants.
09:34:480Michele De Carli: We are going to focus more more mainly on water based solutions. Okay, water-based systems or air water plants. Okay.
09:43:26Michele De Carli: which air water plants is a combination of these 2 systems here. Okay.
09:47:770Michele De Carli: but we are going to talk about the electronic system because they are more difficult to design and to size. Okay, than this system here. Okay, especially this system.
10:01:680Michele De Carli: Okay, so about, we have seen how we can. We can.
10:11:850Michele De Carli: we have seen the different types of system. Okay, this is just a slide for recap, then
10:17:773Michele De Carli: about the water-based solution, the water based system.
10:21:980Michele De Carli: Well, actually, they are working on the principle, especially of convection convection
10:31:610Michele De Carli: convection, which is, of course, as you know, could be natural or forced. Okay,
10:43:490Michele De Carli: so what is a water based solution? Water based system is a practically a quick exchanger where we have water inside, and we have the room on the other side. Okay?
10:55:290Michele De Carli: And of course, by by considering this
11:02:610Michele De Carli: heat exchanger water to room heat exchanger. When we use natural convection, which is mainly used.
11:12:340Michele De Carli: but not only for
11:15:498Michele De Carli: for heating purposes. Okay, then we could have a limited surface or a wide surface. Okay, of course.
11:24:710Michele De Carli: since the power that we need to provide to the room is
11:29:341Michele De Carli: let's say, Q is equal to KS. And Delta. T, okay.
11:37:70Michele De Carli: effective or efficient like that is somehow between the water and the room. Okay? Of course, if
11:46:965Michele De Carli: the surface of the system is limited. Then we need to work
11:53:400Michele De Carli: on a large temperature difference between the water inside the heat exchanger and the room right?
12:00:300Michele De Carli: Like, for instance, in radiators. Okay?
12:05:480Michele De Carli: if you have a relevant surface. So if you are increasing the surface, imagine that you could work on the whole floor area like in the radiance system. Then you could keep a low temperature difference between the water and the
12:20:930Michele De Carli: and of course, as we will see
12:26:390Michele De Carli: in the past, since we use for heating a boiler? Okay? Or make the the combustion? It was not a problem going with high temperatures of the water inside of the water heat exchanges Water plume exchanges. So the premier units.
12:45:750Michele De Carli: But today that we are going to work more and more with heat pumps, of course, if we can reduce the temperature difference between the water and the room. That will reduce also the condensation temperature of the heat pump, which is, of course, beneficial for our systems as we.
13:05:700Michele De Carli: Of course, as in this case, if we are using force ventilation. I told you we have a fan that there is a fan which is moving the air mechanically, and is forcing the air in flowing across the coil the the the coil.
13:32:982Michele De Carli: Then, in this case we, since we have 4 stimulation. We can have a limited dimension, because you can see that this is not very large. Okay? And at the same time could keep a low temperature difference between the room and the phone, which is, of course, beneficial in the in the perspective that we have
13:54:540Michele De Carli: justice.
13:56:50Michele De Carli: Okay, so this is basically what we are going to see. So we are going to stop here. And we come back to this point tomorrow, where we are going to see. Let's say the the main. Let's say,
14:12:930Michele De Carli: schematics of the hydraulic system. And also we are going to see very quickly. Okay, so we will have a rough view or a quick view to these 2 systems.
14:25:540Michele De Carli: Okay, see you tomorrow and have a nice day.