CIESC Journal ›› 2021, Vol. 72 ›› Issue (4): 2038-2046.DOI: 10.11949/0438-1157.20201015

• Fluid dynamics and transport phenomena • Previous Articles     Next Articles

Advanced exergy analysis of heat pump performance affected by heat transfer matching characteristics of non-azeotropic refrigerants

LIANG Kunfeng1(),FENG Changzhen1,WANG Moran1,DONG Bin1(),WANG Lin2,LIU Ruijian1   

  1. 1.College of Vehicle and Traffic Engineering, Henan University of Science and Technology, Luoyang 471003, Henan, China
    2.School of Civil Engineering, Henan University of Science Technology, Luoyang 471003, Henan, China
  • Received:2020-07-27 Revised:2020-10-12 Online:2021-04-05 Published:2021-04-05
  • Contact: DONG Bin

非共沸工质换热匹配特性影响热泵性能的高级分析

梁坤峰1(),冯长振1,王莫然1,董彬1(),王林2,刘瑞见1   

  1. 1.河南科技大学车辆与交通工程学院,河南 洛阳 471003
    2.河南科技大学土木工程学院,河南 洛阳 471003
  • 通讯作者: 董彬
  • 作者简介:梁坤峰(1975—),男,博士,教授,lkf@haust.edu.cn
  • 基金资助:
    国家自然科学基金项目(U1304521);河南科技大学创新团队项目(2015XTD004)

Abstract:

This work is aimed at the non-azeotropic working fluid nonlinear and complex phase change heat transfer process, based on the advanced exergy analysis method, deduced the evaluation index model that characterizes the heat pump system performance—temperature matching degree (TMD), the heat transfer matching characteristics between the non-azeotropic working fluid and the heat exchange fluid are discussed, the accuracy and applicability of the model are verified by experiments. Three representative non-azeotropic working fluids with different temperature slip degrees (M1, M2, M3) are selected as objects, the relationship between TMD and heat exchange pinch point, system COP, exergy efficiency η and actual exergy loss ratio of heat exchanger ε were investigated. The results show that the smaller the TMD, the better the temperature matching between the heat exchange fluids, the greater the COP and exergy efficiency η of the system, the smaller the actual exergy loss of the heat exchanger, and vice versa; and when the TMD is the smallest, the pinch point in the heat exchanger always appears at the saturated gas point .

Key words: heat pump, advanced exergy analysis, non-azeotropic working fluid, temperature matching degree, exergy

摘要:

针对非共沸工质非线性复杂相变传热过程,基于高级分析方法,推导出表征热泵系统性能的评估指标模型——温度匹配度(TMD),探讨了非共沸工质与换热流体之间的换热匹配特性,实验验证了模型的准确性与适用性。选用了三组不同温度滑移程度的非共沸工质(M1、M2、M3)为对象,探究了TMD与换热夹点、系统COP、效率η以及换热器实际损占比ε之间的关系。结果表明:TMD越小,换热流体间的温度匹配越好,系统COP、效率越大,换热器实际损占比越小,反之亦然;且当TMD最小时换热器内夹点总是出现在饱和气态点处。

关键词: 热泵, 高级分析, 非共沸工质, 温度匹配度

CLC Number: