In a vapor compression cycle, the refrigerant state upon leaving the condenser is________________?
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Answer: A. after passing through the condenser
Explanation
In a vapor compression cycle, the refrigerant state upon leaving the condenser is high-pressure liquid. High-pressure superheated vapor enters the condenser, rejects heat to the environment, and condenses into saturated liquid. This high-pressure liquid state is essential before the refrigerant reaches the expansion valve for throttling. The condenser performs two distinct phases: desuperheating the gas and condensing it into a liquid. Pressure-enthalpy diagrams chart this transformation along constant pressure lines from right to left. Refrigerant state points must be tracked accurately to evaluate system efficiency and heat transfer rates.
Air-cooled and water-cooled condensers release absorbed heat into outdoor air or cooling tower water circuits. Monitoring condenser output ensures the system maintains adequate sub-cooling and prevents high head pressures. Technicians check condenser liquid lines during routine service to verify proper refrigerant charge levels. The phrase describing a point after passing through the condenser correctly identifies the high-pressure liquid state. Before passing through the condenser, the refrigerant exists as a high-pressure, high-temperature superheated gas. After passing through the expansion valve, the refrigerant becomes a low-pressure, low-temperature liquid-vapor mixture.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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