Refrigeration & Air Conditioning Mechanic Red Seal · Question
A multi-stage refrigeration system uses an intercooler between the compressor stages. What is the primary purpose of the intercooler in the compression cycle?
The intercooler cools the discharge gas from the low-stage compressor, reducing the volumetric efficiency and discharge temperature of the high-stage compressor
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Question: A multi-stage refrigeration system uses an intercooler between the compressor stages. What is the primary purpose of the intercooler in the compression cycle?
Answer options:
- To increase the overall refrigerating effect by subcooling the liquid refrigerant. ✅ To desuperheat the discharge gas from the low-stage compressor and cool it before entering the high-stage compressor.
- To condense all the refrigerant vapour before it enters the high-stage compressor.
- To separate oil from the refrigerant gas between compressor stages.
Correct answer: To desuperheat the discharge gas from the low-stage compressor and cool it before entering the high-stage compressor.
Explanation: The intercooler cools the discharge gas from the low-stage compressor, reducing the volumetric efficiency and discharge temperature of the high-stage compressor, thereby improving overall system efficiency and reliability.
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Question explanations
- Which of the following refrigerants is a hydrofluorocarbon (HFC) and has a high ozone depletion potential (ODP
- Which component is responsible for compressing the refrigerant vapour to a high pressure and temperature?
- According to the Canadian Electrical Code (CEC), what is the minimum required working clearance in front of el
- What is the main operating characteristic difference between a fixed orifice (capillary tube) and a Thermostat
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