回热器对双级压缩和复叠式压缩制冷系统影响的分析

发布时间：2018-01-05 01:30

本文关键词：回热器对双级压缩和复叠式压缩制冷系统影响的分析　出处：《化工进展》2016年02期 　论文类型：期刊论文

【摘要】：为了研究回热器对双级压缩制冷系统和复叠式压缩制冷系统的影响,以R404A双级压缩制冷系统和R404A/R23复叠式压缩制冷系统为例,通过建立两种制冷系统的热力学模型和?分析法,分析了回热器效率对压缩机排气温度、单位质量制冷量、制冷剂质量流量、系统制热能效比(COP)、系统总?损、系统各部件?损和系统?效率的影响。结果表明,在双级压缩制冷系统中,当回热器效率ε取0.1~0.9时,系统COP增大4.0%,系统的总?损减少9.6%,而系统?效率增大7.1%;在复叠式压缩制冷系统中,系统COP和系统?效率随高温级回热器效率ε增大而增大,随低温级回热器效率ε增大而减小,而系统总的?损随高温级回热器效率ε增大而减小,随低温级回热器效率ε增大而增大。
[Abstract]:In order to study the influence of regenerator compression refrigeration system of two-stage compression refrigeration system and cascade, with R404A two-stage compression refrigeration system and R404A/R23 cascade refrigeration system as an example, through the thermodynamic and model of the two kinds of refrigeration systems? Analysis, analysis of the regenerator efficiency of the exhaust temperature of the compressor. The refrigeration capacity per unit mass, mass flow of refrigerant, the system energy efficiency ratio (COP), the total system loss?, system components and system efficiency loss?? effect. The results show that the two-stage compression refrigeration system, when the regenerator efficiency E was 0.1 ~0.9, COP increased 4%, system the total loss is reduced? 9.6%, and the system efficiency increases? 7.1%; in the cascade compression refrigeration system, COP system and system efficiency? With high temperature heat exchanger efficiency E increases, with the low temperature heat exchanger efficiency E increases, while the total system loss with? High temperature regenerator The efficiency epsilon decreases and increases with the increase of the efficiency of the cryogenic regenerator.

【作者单位】：上海海洋大学食品学院;上海水产品加工与贮藏工程技术研究中心;
【基金】：国家农业成果转化资金项目(2013GB2C000156) 上海市科委项目(13dz1203702)
【分类号】：TB657
【正文快照】： 在实际的蒸气压缩式制冷系统中通常安装回热器,以达到保障系统正常运行和提高系统性能的效果。在回热器中,节流前的液体和来自蒸发器的低温蒸气进行热交换,实现制冷剂液体过冷度,低温蒸气过热。这样,不仅可以降低节流前气体闪发的可能性,而且可以提高压缩机吸气温度,防止低温

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