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MECH 4880 Unit 9 – Multi-stage Vapour Compression Systems Chris Menictas School of Mechanical and Manufacturing Engineering
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4.1 Multi-pressure Systems •A multi-pressure system is a refrigeration system which has two or more low-side pressures. •A multi-pressure system may be found, for example, •in a dairy where one evaporator operates at -35ºC to harden ice cream while another evaporator operates at 2ºC to cool milk. •application in a process industry where a two- or three-stage compression arrangement serves an evaporator operating at a low temperature of -20ºC or lower. •Storing frozen product and another for storing vegetables and drinks.