华南理工大学学报(自然科学版) ›› 2008, Vol. 36 ›› Issue (6): 108-113.

• 动力与电气工程 • 上一篇    下一篇

热泵型空调机组室外机制冷剂侧的换热与流动

刘金平1.2  叶灿滔问楠臻4   

  1. 1. 华南理工大学 电力学院, 广东 广州 510640; 2. 华南理工大学 亚热带建筑科学国家重点实验室, 广东 广州 510640;3. 广州市电信设计有限公司, 广东 广州 510630; 4. 广州市 防雷设施检测所, 广东 广州 510600
  • 收稿日期:2007-04-29 修回日期:2007-05-30 出版日期:2008-06-25 发布日期:2008-06-25
  • 通信作者: 刘金平(1962-),男,教授,主要从事空调系统和制冷设备优化研究. E-mail:mpjpliu@seut.edu.cn
  • 作者简介:刘金平(1962-),男,教授,主要从事空调系统和制冷设备优化研究.
  • 基金资助:

    “十一五”国家科技支撑计划重大项目(2006BAJ03A06);2007年粤港关键领域重点突破项目(TC07BF09-5)

Heat Exchange and Fluid of Refrigerant in Heat-Pump Air Conditioner

Liu Jin-ping 1.2  Ye Can-tao3  Wen Nan-zhen4   

  1. 1. School of Electric Power, South China University of Technology, Guangzhou 510640, Guangdong, China; 2. State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510640, Guangdong, China; 3. Guangzhou Telecom Design Corporation, Limited, Guangzhou 510630, Guangdong, China; 4. Guangzhou Office of Lighting Installation Inspection, Guangzhou 510600, Guangdong, China
  • Received:2007-04-29 Revised:2007-05-30 Online:2008-06-25 Published:2008-06-25
  • Contact: 刘金平(1962-),男,教授,主要从事空调系统和制冷设备优化研究. E-mail:mpjpliu@seut.edu.cn
  • About author:刘金平(1962-),男,教授,主要从事空调系统和制冷设备优化研究.
  • Supported by:

    “十一五”国家科技支撑计划重大项目(2006BAJ03A06);2007年粤港关键领域重点突破项目(TC07BF09-5)

摘要: 对以R22为工质的热泵型空调机组室外机的换热性能及其对机组性能系数的影响进行了试验研究和实例分析,结果表明:制冷剂在室外机内的相变过程均为非定温过程,但温度变化较小,仅为0.5℃,且室外机供热时作为蒸发器的压降约为制冷时作为冷凝器的压降的3—5倍.当室外机换热面积远大于室内机换热面积、制冷工况下室外机换热面积减小20%时,冷凝器换热量仅减小5.75%,COP仅减小4.00%;在制热工况下室外机换热面积减小20%时,蒸发器换热量仅减小3.75%,供热系数仅减小2.25%.

关键词: 热泵型空气调节器, 制冷剂, 换热性能, 压降

Abstract:

The heat exchange performance of the outdoor unit and its effect on the COP of a heat-pump air conditioner with R22 as the refrigerant were tested and practically investigated. The results show that ( 1 ) the phase change of the refrigerant in the outdoor unit is an inconstant temperature process with a slight temperature variation of less than 0. 5℃ ; (2) the refrigerant pressure drop of the outdoor unit in heating condition is 3 - 5 times that in refrigerating condition; and (3) when the heat exchange area of the outdoor unit is larger than that of the indoor unit and when the outdoor unit area decreases by 20%, the heat exchange quantum of the condenser decreases only by 5.75% and the COP of air conditioner decreases by 4. 00% at an outdoor unit area decrease of 20% in refrigerating condition. However, in heating condition, the decreases of the two items respectively change into 3.75% and 2.25 %.

Key words: heat-pump air conditioner, refrigerant, heat exchange performance, pressure drop