Question 87Refrigeration & AC - Assistant Engineer

The correct answer is D) Chilled water system supply temperature. In an air conditioning system using chilled water circulation, the chilled water supply temperature should remain constant regardless of load changes. This is because the supply temperature is the temperature of the chilled water entering the air handling units, and maintaining a consistent supply temperature is crucial for proper temperature control and system efficiency. The other options are incorrect because they are not the primary factor for controlling the air temperature in the system. Compressor discharge temperature and compressor suction pressure are more relevant to the operation of the refrigeration cycle, while the chilled water return temperature can vary based on the system load.