Analysis and optimization on coupling sub-cooler vapor injection air source heat pump system

doi:10.3969/j.issn.0438-1157.2013.08.016

CIESC Journal ›› 2013, Vol. 64 ›› Issue (8): 2813-2819.DOI: 10.3969/j.issn.0438-1157.2013.08.016

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Analysis and optimization on coupling sub-cooler vapor injection air source heat pump system

LI Kuining, GUO Chunlei, ZHOU Wei, CHEN Jia, HU Fei, WEI Feng

Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Chongqing 400030, China

Received:2012-12-21 Revised:2013-01-21 Online:2013-08-05 Published:2013-08-05
Supported by:
supported by the Natural Science Foundation of Chongqing City(CSTC2007BB6183).

一种过冷器耦合的准二级压缩热泵系统特性分析及优化

李夔宁, 郭春雷, 周伟, 陈佳, 胡飞, 魏峰

低品位能源利用技术及系统教育部重点实验室(重庆大学), 重庆 400030

通讯作者: 郭春雷
作者简介:李夔宁(1970- ),男,副教授。
基金资助:
重庆市自然科学基金项目(CSTC2007BB6183)。

Abstract

Abstract: A coupling sub-cooler vapor injection air source heat pump system is proposed,which consists of two sub-cooler vapor injection air source heat pumps and two triple tube heat exchangers.The defrost method involves a coupling defrost system based on traditional hot gas bypass defrost,so that the problem of liquid refrigerant evaporation is solved,which is usually encountered in the outdoor heat exchanger with traditional hot gas bypass defrost.The operation reliability of air source heat pump is improved in the environment of low temperature and high humidity.The simulation and optimization for the new system under normal heating conditions give the optimal medium temperatures and corresponding injection ratios in low temperature environment.A binary linear fitting formula for optimal medium temperatures from condensing temperature and evaporating temperature is obtained.

Key words: air source heat pump, sub-cooler, defrost, medium temperature

摘要： 提出了一种过冷器耦合的准二级压缩空气源热泵系统,该系统由两个三套管换热器将两个带过冷器的准二级压缩热泵系统耦合成一个系统,其除霜方式为基于热气旁通除霜的系统耦合除霜,解决了热气旁通除霜时室外换热器产生液态制冷剂的蒸发问题,提高了空气源热泵在低温高湿环境下运行的性能;对新系统正常制热工况进行仿真优化,找出低温工况的最佳中间温度及相应补气系数;对最佳中间温度进行关于冷凝温度和蒸发温度二元线性拟合并得到经验拟合公式。

关键词: 空气源热泵, 过冷器, 除霜, 中间温度

CLC Number:

TK432

LI Kuining, GUO Chunlei, ZHOU Wei, CHEN Jia, HU Fei, WEI Feng. Analysis and optimization on coupling sub-cooler vapor injection air source heat pump system[J]. CIESC Journal, 2013, 64(8): 2813-2819.

李夔宁, 郭春雷, 周伟, 陈佳, 胡飞, 魏峰. 一种过冷器耦合的准二级压缩热泵系统特性分析及优化[J]. 化工学报, 2013, 64(8): 2813-2819.

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Analysis and optimization on coupling sub-cooler vapor injection air source heat pump system

一种过冷器耦合的准二级压缩热泵系统特性分析及优化

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