Enhancement of Refrigeration Efficiency by a Modified Vapor
Enhancement of Refrigeration Efficiency by a Modified Vapor Compression Cycle (1991)-This paper describes a modification of vapor compression cycles with a novel Heat-Mass-Exchange (HME) technique. The HME unit reduces irreversibilities by utilizing the heat generated in the compressor to pump a portion of the refrigerant. A power savings of 4.2% can be realized on an industrial-size ammonia refrigeration system. The technique also allows the utilization of low grade heat sources (say, at 100°C) to supply a portion of the required thermodynamic work. Calculations indicate that by utilizing such energy sources energy savings of 20 to 30% can be realized. Theoretical and technical considerations of HME-enhanced vapor compression cycle are discussed and two specific examples are provided.
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