Question 1Refrigeration/AC - 1st Asst/Chief70% to pass
Capacity control of a centrifugal refrigeration compressor can be accomplished by what means?
AI Explanation
The correct answer is D) all of the above.
Capacity control of a centrifugal refrigeration compressor can be accomplished by varying the position of the hot gas bypass valve, varying the position of the suction inlet damper vanes, or varying the speed of the compressor. These methods allow the system to adjust the refrigerant flow and compression to match the cooling load, improving efficiency and preventing short-cycling of the compressor. The other options are incorrect because they do not encompass all the possible means of capacity control for a centrifugal refrigeration compressor.
Related Questions
#2 The fluid used as a source of actuating power against the underside of the unloader power element piston of the refrigeration compressor capacity control mechanism illustrated is obtained from where? Illustration GS-RA-13 #3 During operating periods of a multi-box refrigeration system using a capacity controlled compressor, when all of the evaporators of a four box plant are actively being fed with liquid refrigerant, the control oil pressure acting on the hydraulic relay piston will be at what value? Illustration GS-RA-13 #4 On a modern refrigerated container unit employing suction modulation for the purposes of capacity control and capacity limitation, what happens when the applied voltage and current draw associated with the normally open (NO) suction modulation valve located in the suction line both increase?