how to calculate cooling time needed?

[27143721]

I have a question like bellow:

At the beginning, the room temperature and ambient temparature is the same, for example ( 35℃ DB, 70%RH), I want 27℃ DB, 60% inside finally.

the given air conditioner is 10 Kw for example, the thermo transfer coeficient K is 2.4w/m2.c.

let's say the room size is 3m*3m*3m

how to calculate the necessary time?

[Lc_shi]

the time need is : cooling capacity /air volum*delta enthalpy if your cooling capaciy can balance the room heat load

[27143721]

the time need is : cooling capacity /air volum*delta enthalpy if your cooling capaciy can balance the room heat load

most people will reply like this, but, don't forget, it is a dynamic process, the heat will tranfer from outside to the inside, and will become stronger and stronger with temperature decreasing.

[US Iceman]

27143721,


most people will reply like this, but, don't forget,

Why ask the question if you already know the answer? :confused:

[wambat]

27143721,



Why ask the question if you already know the answer? :confused:


It's a test? :rolleyes:

[US Iceman]

The method also seems strangely familar to someone that you might know wambat. :D

[27143721]

27143721,



Why ask the question if you already know the answer? :confused:

I don't know exactly the answer, I only know what is the problem if not considering carefully.
I think maybe some people know better.

by the way, what's the meaning of "wambat"?

[Lc_shi]

27143721
what you say is right,it's dynamical process :)but you can estimate it by easier method at many occasions. Of course if it's a precision lab,you need to carefully calculate it and have a test to confirm it finally.
What I mentioned is only a clue for you; may be you can use some simulation program to run it

regards
LC

[27143721]

may be you can use some simulation program to run it

regards
LC

Do you know the software name to simulate? I know one called Micro-Vissim, but I can't get it.

[Lc_shi]

coolpack is able to do this job. have a try