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Thread: Cooling capacity??
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15-11-2012, 02:55 PM #1
Cooling capacity??
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.
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15-11-2012, 03:47 PM #2
Re: Cooling capacity??
Cooling capacity is the amount of heat that can be removed by cooling unit.
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15-11-2012, 05:45 PM #3
Re: Cooling capacity??
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.
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15-11-2012, 05:49 PM #4
Re: Cooling capacity??
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.I love the smell of Ammonia in the morning!