In a vapor compression cycle, the physical state of the refrigerant immediately exiting the condenser is________________?
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Answer: D. before entering the expansion valve
Explanation
Immediately exiting the condenser, the refrigerant is in a high-pressure liquid state before it reaches the expansion valve. Condensation completes inside the condenser coils, transforming hot vapor into subcooled high-pressure liquid refrigerant. High-pressure liquid refrigerant flows out of the condenser directly toward the expansion device inlet. Vapor compression refrigeration cycles reject heat in condensers by condensing high-pressure superheated vapor into liquid. Subcooling liquid refrigerant inside the condenser ensures that only pure liquid enters the downstream expansion valve. Expansion valves require high-pressure liquid refrigerant to maintain proper mass flow rates through the orifice.
Passing through the condenser describes the active heat rejection process rather than the physical state immediately following it. Prior to passing through the condenser, the refrigerant exists as a high-pressure superheated vapor entering from the compressor. The expansion valve is located downstream of the condenser exit, making post-expansion states irrelevant to this point.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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