Refrigeration & Air Conditioning Mechanic Red Seal · Question
A Pressure-Enthalpy (P-h) diagram for a vapour compression cycle shows the discharge pressure at 1800 kPa and the suction pressure at 400 kPa. If the refrigerant is R-407C, what region on the P-h diagram represents the state of the refrigerant entering the condenser?
Refrigerant leaves the compressor as a high-pressure, high-temperature superheated vapour, which is then desuperheated and condensed in the condenser.
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Question: A Pressure-Enthalpy (P-h) diagram for a vapour compression cycle shows the discharge pressure at 1800 kPa and the suction pressure at 400 kPa. If the refrigerant is R-407C, what region on the P-h diagram represents the state of the refrigerant entering the condenser?
Answer options:
- Saturated liquid
- Saturated vapour ✅ Superheated vapour
- Subcooled liquid
Correct answer: Superheated vapour
Explanation: Refrigerant leaves the compressor as a high-pressure, high-temperature superheated vapour, which is then desuperheated and condensed in the condenser.
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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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