Refrigeration & Air Conditioning Mechanic Red Seal · Question
How does increasing the superheat setting of a Thermostatic Expansion Valve (TXV) affect the refrigerant flow into the evaporator and the evaporator coil temperature distribution?
Increasing the superheat setting reduces refrigerant flow into the evaporator, leading to a larger portion of the evaporator coil being dedicated to superheatin
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Question: How does increasing the superheat setting of a Thermostatic Expansion Valve (TXV) affect the refrigerant flow into the evaporator and the evaporator coil temperature distribution?
Answer options:
- Increases flow, causes more of the coil to be flooded. ✅ Decreases flow, causes more of the coil to be used for superheating.
- Increases flow, causes more of the coil to be used for superheating.
- Decreases flow, causes less of the coil to be flooded.
Correct answer: Decreases flow, causes more of the coil to be used for superheating.
Explanation: Increasing the superheat setting reduces refrigerant flow into the evaporator, leading to a larger portion of the evaporator coil being dedicated to superheating the vapour, as less liquid is present.
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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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