Compressors Series And Parallel
Compressors Series And Parallel
Compressors
A compressor is a mechanical device that increases the pressure of a gas by reducing its volume. An air compressor is a specific type of gas compressor.
Compressors can be connected in series to increase their discharge pressure (compression ratio) or they can be connected in parallel to increase their flow capacity. Series compressors on the same shaft can usually be protected by a single anti-surge control system.
When operating multiple compressors in parallel, the total flow (load) can be so distributed among the machines that one is fully loaded and the other handles the variations in demand.
Controlling two or more compressors operating in parallel and having identical characteristics would be relatively simple. It is very difficult, if not impossible, to find two compressors having identical performance characteristics. Slight variations in flow can cause one compressor to be fully loaded. The parallel machine then has useless recycle. The control scheme shown in Figure alleviates that problem.
Two compressors are in series
Two compressors are in parallel
Controlling two or more compressors operating in parallel and having identical characteristics would be relatively simple. It is very difficult, if not impossible, to find two compressors having identical performance characteristics. Slight variations in flow can cause one compressor to be fully loaded. The parallel machine then has useless recycle. The control scheme shown in Figure alleviates that problem.
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