Refrigeration & Air Conditioning Mechanic Red Seal · Question
How does a non-condensable gas in a refrigeration system affect system performance?
Non-condensable gases (like air) accumulate in the condenser, occupying space meant for refrigerant. This increases the total pressure and temperature in the co
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Question: How does a non-condensable gas in a refrigeration system affect system performance?
Answer options:
- It increases the evaporator pressure, improving cooling capacity
- It lowers the condensing pressure, reducing energy consumption ✅ It increases the discharge pressure and temperature, reducing efficiency and capacity
- It improves oil return to the compressor
Correct answer: It increases the discharge pressure and temperature, reducing efficiency and capacity
Explanation: Non-condensable gases (like air) accumulate in the condenser, occupying space meant for refrigerant. This increases the total pressure and temperature in the condenser, leading to higher discharge pressures, reduced efficiency, and lower cooling capacity.
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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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