流体机械2016，Vol.44Issue(11)：71-77,48,8.DOI:10.3969/j.issn.1005-0329.2016.11.015
压缩机容量比固定的双级压缩热泵系统变工况性能分析
Performance Analysis of Two-stage Vapor Compression Systems with Fixed Compressor Cylinder Volume Ratio under off-design Conditions
摘要
Abstract
Heating performances and exergy efficiencies are analyzed for two types of two-stage vapor compression systems with refrigerant injection and fixed compressor cylinder volume ratio,based on both the first and second law of thermodynamics.Re-sults show that,the injection process improves the performance of the system by decreasing the exergy losses during the conden-sing and throttling process,resulting in higher heating capacity,coefficient of performance and exergy efficiency than systems without refrigerant injection.However,the performance improvements decline with an increase in the evaporating temperature or with a decrease in the condensing temperature.Furthermore,there exist minimum operation pressure ratios for systems with re-frigerant injection under off-design conditions.The minimum operation pressure ratio is 3.67 for refrigerant injection systems with the compressor cylinder volume ratio of 2.81 at the condensing temperature of 40 °C.关键词
双级压缩/中间喷射/分析/最小运行压力比Key words
two-stage compression/intermediate injection/exergy analysis/minimum operation pressure ratio分类
机械制造引用本文复制引用
金旭,张阔,蒋爽,王树刚,王凤..压缩机容量比固定的双级压缩热泵系统变工况性能分析[J].流体机械,2016,44(11):71-77,48,8.基金项目
2014年吉林市科技计划项目（201464060）；2014年东北电力大学博士科研启动基金资助项目 （）
