Question

1. What are the main expansion processes found in refrigeration systems? What are the advantages and...

1. What are the main expansion processes found in refrigeration systems? What are the advantages and disadvantages of each expansion method?

2. If we have cooled the compressor with a fan, do you think the overall efficiency would have increased or decreased? Not taking into account the power consumption of the fan for computing the efficiency.

Engineering   Mechanical-Engineering   
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Answer #1

1) There are 2 types of expansion processes Internally equilized and externally equilized

A) Internally equalized valves can be used on single circuit evaporator coils having low pressure drop.

   Internally equalized TXV cannot be replaced with an Externally equalized TXV.

B) The Externally equalized TXVs can be used on all applications.

Externally equalized valves must be used on multi-circuited evaporators with refrigerant distributors only.

2) If the compressor is cooled the work input to the compressor decreases so the overall efficiency will increase.

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