What factor determines the centrifugal pressure in a compressor?

The centrifugal pressure in a compressor is primarily influenced by the speed of the motor. As the speed of the motor increases, the rotational velocity of the impeller within the compressor also increases. This higher rotational speed enhances the ability of the compressor to convert kinetic energy into pressure energy, resulting in increased centrifugal pressure.

The interaction between the rotating impeller and the refrigerant creates centrifugal forces that propel the refrigerant outward, compressing it in the process. Therefore, the speed at which the motor operates directly correlates to the efficiency and effectiveness of the compression process, making it a critical factor in determining centrifugal pressure.

While the size of the compressor, the type of refrigerant, and the temperature of the refrigerant all play roles in the overall performance and efficiency of the refrigeration cycle, they do not directly influence the centrifugal pressure generated by the impeller's motion. Hence, the motor speed is the primary determinant of centrifugal pressure in this context.