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空气源跨临界CO2热泵中回热器影响的研究 预览

A Study on the Effect of the Internal Heat Exchanger in an Air-Source Transcritical CO2 Heat Pump System
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摘要 为了研究回热器对空气源跨临界CO2热泵系统运行情况的影响,以及回热器是否适用于跨临界CO2热泵,进行了理论和实验两方面的研究。基于热力学分析方法对不同气体冷却器出口温度、排气压力下回热器效率的影响进行了理论研究,结果表明回热器提升系统性能系数与否取决于气体冷却器出口温度,气冷出口温度较高时,回热器效率增大才能提高性能系数。实验则在跨临界CO2热泵样机上进行,结果表明:应用回热器可降低系统最优排气压力,降低幅度随环境温度降低以及进出水温度升高而增大;采用回热器可减少最优排压下系统功耗、提高系统性能系数,但对制热量影响趋势不定,在本实验中性能系数最多提升6.65%,功耗最多降低6.22%;虽然回热器的应用能提高系统性能系数,但同时也将导致系统排气温度增大,所以不适宜在低环境温度工况下使用。对理论和实验分析结果的差异进行了讨论,同时建立了最优排压降低值与环境温度、进出水温度之间的实验关联式来数值化地体现回热器对系统排气压力的影响,对回热器在工程中实际应用具有一定的参考意义。 The impact of the internal heat exchanger(IHX) on a transcritical CO2 heat pump is investigated based on both theoretical and experimental methods. A thermodynamic analysis is conducted to study the influences of the IHX’s heat transfer efficiency at different gas cooler outlet temperatures and discharge pressures. The theoretical results show that whether the IHX improves the system performance coefficient depends on the gas cooler outlet temperature. Experiments are performed on a transcritical CO2 heat pump prototype, and the results indicate that IHX can reduce the optimal discharge pressure, and the degree of this reduction is enhanced with the decrease of ambient temperature and the increase of inlet and outlet water temperatures. Applying IHX brings an increase of 6.65% in the coefficient of performance and a decrease of 6.22% in power consumption at most, but it leads to a higher compressor discharge temperature, hence it must be restricted at lower ambient temperature. Moreover, the differences between theoretical and experimental results are analysed, and a numerical correlation of the reduced value of optimal discharge pressure with the ambient temperature, inlet and outlet water temperatures is established based on the experimental data.
作者 叶祖樑 王驿凯 潘祖栋 赵建峰 曹锋 李明佳 YE Zuliang;WANG Yikai;PAN Zudong;ZHAO Jianfeng;CAO Feng;LI Mingjia(School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China;Zhejiang Dunan Electro-Mechanical Technology Co. Ltd. , Zhuji, Zhejiang 311800, China)
出处 《西安交通大学学报》 EI CAS CSCD 北大核心 2019年第5期1-8,共8页 Journal of Xi'an Jiaotong University
基金 国家自然科学基金资助项目(51576152).
关键词 跨临界CO2热泵 回热器 实验研究 关联式 transcritical CO2 heat pump internal heat exchanger experimental study correlation
作者简介 叶祖樑(1993-),男,博士生;通信作者:曹锋,男,教授。
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  • 1马一太,管海清,李敏霞,杨俊兰.CO2跨临界循环系统润滑油分析[J].天津大学学报:自然科学与工程技术版,2004,37(9):783-786. 被引量:5
  • 2马一太,杨俊兰,管海清,李敏霞.Configuration Consideration for Expander in Transcritical Carbon Dioxide Two-Stage Compression Cycle[J].天津大学学报:英文版,2005,11(1):53-58. 被引量:3
  • 3管海清,马一太,杨俊兰,李敏霞.Thermodynamic Comparison Analysis on CO2 Transcritical Reverse Cycles with IHX or Expander[J].天津大学学报:英文版,2005,11(2):110-114. 被引量:2
  • 4Lorentzen G. The use of natural refrigerants : A complete solution to the CFC/HCFC predicament [J]. Int J Refrig, 1995, 18(3):190-197. 被引量:1
  • 5Kusakari K. The newest situation and the future view of the CO2 refrigerant heat pump water heater "Eco Cute" in Japan[C]// The 9th International IEA Heat Pump Conference. Zurich, Switzerland, 2008. 被引量:1
  • 6Tetsuhide Yokoyama, Kei Sasaki, Shin Sekiya. Developing a two stage rotary compressor for CO2 heat pump systems with refrigerant injection [C]// International Compressor Engineering Conference. Purdue, USA, 2008. 被引量:1
  • 7Kenji Yano, Hideto Nakao, Mihoko Shimoji. Development of large capacity CO2 scroll compressor [C]//International Compressor Engineering Conference. Purdue, USA, 2008. 被引量:1
  • 8Shun Yoshioka, Hyunyoung Kim, Kazushige Kasai Effect of PAG oil circulation rate on the heat transfer per formance of air-cooled heat exchanger in carbon dioxide heat pump system [C]// The 9th International lEA Heat Pump Conference. Zurich, Switzerland, 2008. 被引量:1
  • 9Fukuta M, Yanagisawa T, Nakaya S, et al. Performance and characteristics of compressor/expander combination for CO2 cycle[C]// The 7th IlR Gustav Lorentzen Conference on Natural Working Fluids. Norway, 2006. 被引量:1
  • 10Masaru Matsui, Masanobu Wada, Takeshi Ogata, et al. Development of high-efficiency technology of twostage rotary expander for CO2 refrigerant[C]//International Compressor Engineering Conference. Purdue, USA, 2008. 被引量:1

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