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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