What happens to the compressor capacity when suction pressure decreases?

When the suction pressure decreases, the compressor's capacity typically decreases as well. This is because the compressor relies on a specific pressure differential between the suction and discharge sides to operate efficiently.

When the suction pressure drops, it indicates that there is less refrigerant vapor entering the compressor. As a result, there is less refrigerant available to be compressed, which leads to a reduction in the overall capacity of the compressor to move refrigerant through the system. This translates into a lower cooling effect produced by the air conditioning or refrigeration system.

With a decrease in suction pressure, the ability of the compressor to maintain the necessary flow rate and pressure for effective heat exchange is compromised, leading to diminished performance. This change directly impacts the system's efficiency and cooling capacity, emphasizing the importance of maintaining appropriate suction pressure for optimal operation.