Cooling capacity??

[greg722]

Hi all,

I'm currently studying building services and have a refrigeration exam on the way.

Some advised areas to revise and understand are:

Refrigerant effect

Coefficient of Performance

Compressor power

Cooling capacity.

I am happy with the first 3 however, I have searched everywhere I can think of, for the cooling capacity without luck. Can anyone point me in the direction of where I can find out about it. As I thought it was the same as the refrigerant effect.

The question is based on cycles, and all I could find in books and the internet is about plant sizing which from the question im sure is a different meaning.

Thanks Greg.

[chemi-cool]

Cooling capacity is the amount of heat that can be removed by cooling unit.

[greg722]

Once I found the answer I realised I was looking far to deep.

As you said Chemi, the amount of cooling work done.

Mass flow rate x Refrigerant effect.

[hookster]

You need to go back to your basics here.
I would assume they will base questions on the Log P-H diagram(Mollier). This is the basis to the refrigeration simple cycle.

The refrigeration consists of the following states.
Polytropic Compression
Isobaric cooling (Supercooling included)
Isenthalpic expansion
Isobaric expansion - This is your cooling capacity and corresponds to your net cooling capacity.