Question 96Refrigeration & AC - Assistant Engineer

The correct answer is B) A regulating valve controls the quantity of chilled water flowing in the cooling coils. In an air conditioning system using chilled water circulation, the temperature of the circulated air is controlled by regulating the flow of chilled water through the cooling coils. By adjusting the opening of a regulating valve, the amount of chilled water flowing across the coils can be increased or decreased, which in turn affects the temperature of the air being cooled. This is the primary method used to control the air temperature in such systems. The other options are incorrect because they do not directly control the temperature of the circulated air. Adjusting fan speed (A), inlet water temperature (C), or the number of air passes (D) may affect the cooling capacity, but they do not provide the direct temperature control that a regulating valve on the chilled water flow can provide.