During the re-expansion of the compressor cycle, which valve is closed?

In the context of a refrigeration or air conditioning cycle that utilizes a compressor, understanding the operation of the valves during the re-expansion phase is crucial. During this phase, the compressor is attempting to generate a low-pressure environment where the refrigerant can expand and absorb heat.

When the re-expansion occurs, the suction valve must be closed to maintain the pressure within the compressor casing, allowing it to manage the change in refrigerant state effectively. By closing the suction valve during re-expansion, you prevent the return of low-pressure gas to the compressor, which could disrupt the cycle and lead to inefficiency or damage.

This process helps in creating a clear differential pressure that allows the system to function correctly, ensuring that the refrigerant continues to circulate adequately throughout the system. The proper operation of the valves is essential for maintaining the overall efficiency and function of the refrigeration cycle, which is why the statement that the suction valve is closed during re-expansion is accurate.