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Heat and Thermodynamics - SS2 Physics Past Questions and Answers - page 5

41

In a refrigeration system, the refrigerant undergoes an expansion process in the expansion valve. During this process, the refrigerant:

A

Increases in temperature and pressure

 

 

B

Increases in temperature and decreases in pressure

 

C

Decreases in temperature and pressure

 

D

Decreases in temperature and increases in pressure

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42

Explain the working principle of a refrigeration system, including the roles of each component involved.

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43

Discuss the concept of coefficient of performance (COP) in refrigeration systems and its significance.

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44

Describe the working principle of a heat pump and explain how it differs from a refrigerator.

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45

Discuss the concept of refrigerant selection in refrigeration and heat pump systems.

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