AI Assistant
Transcript
00:01:710Michele De Carli: Okay, so okay, so
00:11:250Michele De Carli: next, or the next session, or the next topic is cooling. Okay? So we have seen how to calculate the power for heating. Okay, what we are going to do. Now, let's say, tomorrow, okay is the cooling. Okay? And in this case
00:34:540Michele De Carli: we will mainly or just talk about power. Okay, I've just really give you a brief
00:43:560Michele De Carli: overview on how to calculate the the energy. But let's say that for cooling we are just interested in the power. Okay?
00:53:660Michele De Carli: not because the energy required by cooling is negligible, but because let's say, it's we have no time to look at that. Okay, okay. So
01:07:200Michele De Carli: there are several ways to calculate the cooling power. Okay, what we are going to look at is basically the the simplest
01:19:160Michele De Carli: way to calculate the power. And as a matter of fact, you will see that you will be able to implement in an excel file. Okay, the calculation for the pick load for okay, which is very simple. And you can. No, you can. You have to do that. Okay, so anyway, this is a very, it's it's not complicated. Okay?
01:42:770Michele De Carli: So very, I just introduced this concept. And then we we come back tomorrow. Okay, the
01:53:20Michele De Carli: when we talk about the cooling demand or when we talk. Sorry when we talk about the cooling power, we have to think about that. We have to consider a system, a dynamic
02:08:110Michele De Carli: system. Okay? So when we talk about cooling, we consider dynamic conditions. Okay, so when we we have seen that in heating we consider just the same condition. Okay, so static conditions with a fixed temperature
02:23:180Michele De Carli: and and nothing else. Okay, in in cooling, we need to take into account the variation of conditions. Okay, so the variable conditions in the outside temperature. Okay, so we need to consider the design conditions. So the extreme conditions.
02:40:490Michele De Carli: what we could consider in principle as extreme condition in a certain location
02:45:959Michele De Carli: with a temperature difference with temperature change over day and also in clear sky condition. We consider also the solar radiation and also the internal gains. Okay, as
02:59:610Michele De Carli: and as in
03:04:520Michele De Carli: whatever is your is your calculation method. Okay? So depending. If you are considering
03:15:570Michele De Carli: the a detailed calculation method, or even a simple calculation approach as we are going to use here. Okay.
03:23:710Michele De Carli: the concept is this one is the following.
03:28:442Michele De Carli: so let's say that we are in a real dynamic problem.
03:35:830Michele De Carli: And usually in a dynamic problem. We have to consider a a system okay, with a certain connection with a certain
03:49:670Michele De Carli: this case, the let's say the the, the.
03:56:230Michele De Carli: the capacitance of the room. But in a similar project. Sorry. Just to give a similar problem is like like when you're you're considering a dynamic problem like
04:12:240Michele De Carli: to move a certain mass, a certain body. Okay, with a certain mass, we have to consider dimension this by this system. Okay.
04:21:764Michele De Carli: so like a like a car, okay, or whatever we are considering. Okay or bike, we have veneration.
04:30:780Michele De Carli: We have to. We have to. We need a certain input okay, in order to have a certain.
04:38:910Michele De Carli: Okay?
04:40:80Michele De Carli: So the input is the solicitation.
04:47:970Michele De Carli: And the output is a effect. Okay, so basically in in the cooling calculation.
05:04:00Michele De Carli: the solicitation is due to the different
05:10:415Michele De Carli: solar aviation, the outdoor condition, the indoor, the indoor
05:20:50Michele De Carli: the internal gains, and the output will be the response of the review. Okay.
05:27:350Michele De Carli: with respect to this solicitation. Okay, so there is a let's say, a kind of mismatch, or or, let's say, a.
05:38:470Michele De Carli: a, a difference between what we can consider as input and what we get as output. And the output is related to the response of the of the system of the room of the walls, or what we are going to what we are considering.
06:01:400Michele De Carli: welcome to say, yeah, 10 min if
06:15:919Michele De Carli: we come back tomorrow because I don't. I know when I start, but I don't know. I don't know when I can finish this this this issue. Okay, okay. So we come back tomorrow from this point. Okay? So see you tomorrow. Okay.
06:37:40Michele De Carli: okay.