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The choice of a refrigerant depends upon : 1. Refrigerating capacity 2. Type of compressor used (reciprocating, centrifugal or screw) 3. Service required (whether for air conditioning, cold storage or food freezing) Which of the above statements is/are correct? (a) 1 and 3 only (b) 1 only (c) 3 only (d) 1, 2 and 3 |
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Answer» (d) 1, 2 and 3 The choice of a refrigerant depends 1. If a refrigerant has large latent heat of evaporation the size of condenser evaporator and compressor reduces because less mass flow rate. 2. If a specific volume a refrigerant is large at evaporator pressure, the size of compressor increases. Large specific volume refrigerant are compressed by centrifugal compressor and less specific by centrifugal compressor and less specific volume refrigeants by reciprocating compressor. 3. Off course evaporator temperature (high for air conditioner as compared to cold storage) also influence the refrigerant choice. |
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