Correct option is C
In a vapor compression refrigeration system, the centrifugal compressor is particularly sensitive to changes in both the evaporator temperature and the condenser temperature. Here's why:
Evaporator temperature: A decrease in evaporator temperature increases the specific volume of the refrigerant vapor at the compressor inlet. This requires the centrifugal compressor to handle a larger volume flow rate to maintain the same mass flow rate, which can lead to surging (a phenomenon where flow becomes unstable) if the compressor operates outside its designed range.
Condenser temperature: An increase in condenser temperature raises the pressure against which the compressor must discharge. Centrifugal compressors are sensitive to pressure ratios, and higher condenser pressures can reduce the compressor's efficiency and flow capacity, potentially causing choking or surging.
Thus, both temperatures significantly affect the performance and stability of a centrifugal compressor.
