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Question 2
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The sketch above shows a refrigeration cycle.
- Identify the type of refrigeration system.
- Identify the parts labelled P, Q, R, S and T.
- State the functions of the parts labelled P, Q, S and T.
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| Observation |
This question was very difficult for the candidates as they could not provide the required responses to the various parts of the question. The required responses are:
- vapour compression system.
- P is Compressor
Q is Condenser
R is Drier
S is Control valve/metering device
T is Evaporator.
- P is to suck in refrigerant, compresses the refrigerant and discharge the refrigerant.
Q is to reject the heat from the refrigerant and change the state of the refrigerant from vapour to liquid.
S is to regulates and meters the amount of refrigerant flowing into the evaporator.
T is to absorb heat from the products to be cooled and change the state of the refrigerant from liquid to vapour. |
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