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高温CO2热泵的超临界喷气增焓性能
Authors
冯自平
吴孟霞
+3 more
宋文吉
李帅旗
王汉治
Publication date
1 January 2020
Publisher
Abstract
提出了一种基于高温超临界喷气增焓技术的新型CO2热泵循环,以显著提升跨临界CO2热泵在高温循环加热工况下的制热性能。通过建立超临界喷气增焓型高温CO2热泵系统的数值模型,并采用EES(engineering equation solver)软件对该热泵系统的循环加热性能进行了仿真分析。研究了在较高气体冷却器出口温度下,蒸发温度、压缩机中间压力、气体冷却器压力等参数对单位容积制热量和性能系数(COP)的影响。结果表明:在最优排气压力下,气体冷却器出口温度高达60℃时,该热泵循环的COP也能达到3.0左右;相对于普通喷气增焓系统,COP明显提高;相对于无喷气增焓的常规系统,在气体冷却器出口温度为60℃时,相对补气量为0.3、0.4、0.5的超临界喷气增焓系统COP分别提高了14.8%、21.2%、29.2%;气体冷却器压力和中间压力对系统COP的影响变化趋势一致,但气体冷却器压力的影响更为显著;此外,存在最优的气体冷却器压力和中间压力使系统COP达到最大,在气体冷却器出口温度为60℃,相对补气量为0.4时,最优气体冷却器压力和中间压力分别为13.5MPa和8.5MPa
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Institutional Repository of GuangZhou Institute of Energy Conversion, CAS
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oai:ir.giec.ac.cn:344007/34376
Last time updated on 04/12/2021
Institutional Repository of GuangZhou Institute of Energy Conversion, CAS
See this paper in CORE
Go to the repository landing page
Download from data provider
oai:ir.giec.ac.cn:344007/34378
Last time updated on 04/12/2021