What is the correct sequence of the vapor-compression cooling cycle?

What is the correct sequence of the vapor-compression cooling cycle?

• A. Evaporator, Compressor, Condenser, Expansion
• B. Condenser, Evaporator, Expansion, Compressor
• C. Expansion, Evaporator, Compressor, Condenser
• D. Evaporator, Expansion, Condenser, Compressor

Answer: (A)

In a vapor-compression cooling cycle, the refrigerant moves through four stages in a specific order to absorb heat, be compressed, reject heat, and reset for another cycle. It starts in the evaporator where low-pressure refrigerant absorbs heat from the space and boils into a vapor, providing the cooling effect. That vapor then enters the compressor, which raises its pressure and temperature, turning it into a high-pressure, high-temperature gas. The hot gas releases heat as it goes through the condenser and condenses into a liquid. Finally, the liquid passes through the expansion device, where its pressure drops dramatically and it cools before returning to the evaporator to start the cycle again. This sequence—evaporator, compressor, condenser, expansion—is what makes the cycle work correctly. If the expansion occurs before the condenser or the condenser before the evaporator, the refrigerant wouldn’t undergo the required phase changes and pressure changes in the right order, preventing proper cooling.

In a vapor-compression cooling cycle, the refrigerant moves through four stages in a specific order to absorb heat, be compressed, reject heat, and reset for another cycle. It starts in the evaporator where low-pressure refrigerant absorbs heat from the space and boils into a vapor, providing the cooling effect. That vapor then enters the compressor, which raises its pressure and temperature, turning it into a high-pressure, high-temperature gas. The hot gas releases heat as it goes through the condenser and condenses into a liquid. Finally, the liquid passes through the expansion device, where its pressure drops dramatically and it cools before returning to the evaporator to start the cycle again. This sequence—evaporator, compressor, condenser, expansion—is what makes the cycle work correctly. If the expansion occurs before the condenser or the condenser before the evaporator, the refrigerant wouldn’t undergo the required phase changes and pressure changes in the right order, preventing proper cooling.