低温下提高CO2空气源热泵进水温度对系统性能的影响

doi:10.11949/j.issn.0438-1157.20160981

化工学报 ›› 2016, Vol. 67 ›› Issue (S2): 378-385.DOI: 10.11949/j.issn.0438-1157.20160981

低温下提高CO₂空气源热泵进水温度对系统性能的影响

寇宏侨¹, 罗会龙¹, 杜鸿儒², 杜培俭³, 郎峰³, 林辩启¹

1. 昆明理工大学建筑工程学院, 云南昆明 650504;
2. 天津大学化工学院, 天津 300072;
3. 昆明东启科技股份有限公司, 云南昆明 650106

收稿日期:2016-07-12 修回日期:2016-08-30 出版日期:2016-12-30 发布日期:2016-12-30
通讯作者: 罗会龙
基金资助:
国家科技支撑计划项目（2012BAA13B02）；云南省自然科学基金重点项目（2015FA018）；云南省烟草公司科技项目（2015YN10）。

Effects of inlet water temperature of air source carbon dioxide heat pump on system performance under low-temperature climate conditions

KOU Hongqiao¹, LUO Huilong¹, DU Hongru², DU Peijian³, LANG Feng³, LIN Bianqi¹

1. Faculty of Civil Engineering, Kunming University of Science and Technology, Kunming 650504, Yunnan, China;
2. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
3. Kunming Dongqi Corporation of Science and Technology, Kunming 650106, Yunnan, China

Received:2016-07-12 Revised:2016-08-30 Online:2016-12-30 Published:2016-12-30
Supported by:
supported by the National Key Technology Research and Development Program of the Ministry of Science and Technology of China(2012BAA13B02),the Natural Science Foundation of Yunnan Province(2015FA018)and the Tobacco Company Science and Technology Project of Yunnan Province(2015YN10).

摘要/Abstract

摘要：

在低温工况下，因跨临界循环CO₂热泵系统气体冷却器的进水温度和CO₂出口温度降低，压缩机吸气压力和温度随之降低。当系统的吸气压力低于压缩机的吸气压力下限时，将导致系统无法稳定运行。为了改变这种现象，采用在气体冷却器冷水入口处混水的方法，将热水箱的热水旁通至气体冷却器冷水入口。采用三通调节阀调节混水比例，适当提高气体冷却器的进水温度，以期实现系统在低温工况下的稳定运行。实验测试结果表明，采用混水方法不仅可保证低温工况下跨临界循环CO₂空气源热泵热水系统的稳定运行，同时可降低结霜频率，延长系统运行时间，但系统的制热量和COP将小幅下降。兼顾系统的热力性能及运行稳定性，当环境温度为-20℃、制热温度为60℃时，较为适宜的混水温度为12~18℃。

关键词: 二氧化碳, 压缩机, 实验验证, 进水温度, 混水, 系统性能

Abstract:

Under low-temperature climate conditions,the compressor suction pressure and temperature are reduced owning to the decrease of the temperature of the inlet water and the outlet CO₂of the gas cooler in the trans-critical cycle CO₂ heat pump system.When the compressor suction pressure is less than the lower limit of the suction pressure,it leads to the unstable operation of the system.In order to overcome this drawback,a method of mixing water at the inlet of cold water in the gas cooler is presented.Proper quantities hot water in hot water tank is supplied to the cold water inlet of the gas cooler by a by-pass pipe.Adjusting the three-way valve to change the proportion of mixing water,the inlet temperature of gas cooler is increased to make the system run steadily under low-temperature climate conditions.Test results show that the method of mixing water could not only ensure the system of CO₂ air source heat pump hot water system works steadily under low-temperature conditions,but also increase operation time of the system and reduce the frequency of frosting.However,the heating power and COP(coefficient of performance)of the system declines slightly.Considering the operation stability and thermal performance simultaneously,the suitable temperature of mixing water for this system is 12-18℃ when ambient temperature is -20℃ and heating temperature is 60℃.

Key words: carbon dioxide, compressor, experimental validation, inlet water temperature, mixing water, system performance

中图分类号:

TK11⁺4

寇宏侨, 罗会龙, 杜鸿儒, 杜培俭, 郎峰, 林辩启. 低温下提高CO₂空气源热泵进水温度对系统性能的影响[J]. 化工学报, 2016, 67(S2): 378-385.

KOU Hongqiao, LUO Huilong, DU Hongru, DU Peijian, LANG Feng, LIN Bianqi. Effects of inlet water temperature of air source carbon dioxide heat pump on system performance under low-temperature climate conditions[J]. CIESC Journal, 2016, 67(S2): 378-385.

参考文献 20

[1]	LORENTZEN G.The use of natural refrigerants: a complete solution to the CFC/HCFC predicament[J].International Journal of Refrigeration, 1995, 18(3): 190-197.
[2]	ORITIZ T M, LI D, GROLL E A.Evaluation of the performance potential of CO2 as a refrigerant in air-to-air air conditioners and heat pumps[J].System Modeling and Analysis,2003, 110(3):619-626.
[3]	MA Y T, LIU Z Y, TIAN H.A review of transcritical carbon dioxide heat pump and refrigeration cycles[J].Energy, 2013, 55: 156-172.
[4]	AUSTIN B T, SUMATHY K.Transcritical carbon dioxide heat pump system: a review[J].Renewable and Sustainable Energy Reviews, 2011, 31(17/18): 3774-3782.
[5]	AGRAWAL N, BHATTACHARYYA S, SARKAR J.Optimization of two-stage transcritical carbon dioxide heat pump cycles[J].International Journal of Thermal Sciences, 2007, 46(2): 180-187.
[6]	姜云涛, 马一太, 刘和成, 等.带回热器的高效跨临界CO2水-水热泵的实验研究[J].天津大学学报, 2010, 43(4):298-293. JIANG Y T, MA Y T, LIU H C, et al.Experimental pump with internal heat exchanger[J].Journal of Tianjin University, 2010, 43(4): 298-293.
[7]	ZHANG F Z,JIANG P X,LIN Y W,et al.Efficiencies of subcritical and transcritical CO2 inverse cycles with and without an internal heat exchanger[J].Applied Thermal Engineering,2011,31(4): 432-438.
[8]	CHEN Y, GU J.The optimum high pressure for CO2 transcritical refrigeration systems with internal heat exchangers[J].Int.J.Refrigeration, 2005, 28(8): 1238-1249.
[9]	金东旭, 王平, 小山繁,等.回热器对跨临界CO2热泵系统性能的影响[J].西南交通大学学报, 2012, 47(4): 634-638. JIN D X, WANG P, KOYAMA S, et al.Effects of internal heat exchanger on performance of transcritical CO2 heat pump system[J].Journal of Southwest Jiaotong University,2012, 47(4): 634-638.
[10]	ELBEL S W, HRNJAK P S.Ejector refrigeration: an overview of historical and present developments with an emphasis on air conditioning applications[C]//Proceedings of the 12th International Refrigeration and Air Conditioning Conference.West Lafayette, Indiana, 2008: 23-50.
[11]	ELBEL S W, HRNJAK P S.Experimental validation of a prototype ejector designed to reduce throttling losses encountered in transcritical R744 system operation[J].International Journal of Refrigeration,2008, 31(3): 411-422.
[12]	陈琪, 吕宇捷, 佟杨, 等.跨临界CO2热泵系统的喷射特性[J].化工学报, 2012, 63(S2): 166-169. CHEN Q, LÜ Y J, TONG Y, et al.Ejector used in transcritical CO2 heat pump system[J].CIESC Journal, 2012,63(S2): 166-169.
[13]	邹春妹, 岑继文, 刘培, 等.跨临界二氧化碳热泵喷射循环实验[J].化工学报,2016,67(4):1520-1526. ZOU C M, CEN J W, LIU P, et al.Transcritical CO2 heat pump system with an ejector[J].CIESC Journal,2016,67(4):1520-1526.
[14]	罗刚, 唐文涛, 王瑞祥.一种新流程空气源热泵的低性能实验研究[J].流体机械, 2005, 33(9): 39-42. LUO G, TANG W T, WANG R X.Experimental investigation on an air source heat pump system with a new refrigeration cycle[J].Fluid Machinery, 2005, 33(9): 39-42.
[15]	朱世平,郑心,快速除霜空调器: 2376603U[P]. 2000-05-03. ZHU S P, ZHENG X, Quick defrosting air conditioner:2376603U[P]. 2000-05-03.
[16]	陈卉青,刘兴中,王增翔,等.一种热泵系统中使用的气液分离: 2522805U[P].2002-11-27. CHEN H Q, LIU X Z, WANG Z X, et al.A heat pump system used in gas Liquid separation:2522805U[P]. 2002-11-27.
[17]	BEAK C H, HEO J, JUNG J H, et al.Effects of vapor injection techniques on the heating performance of a CO2 heat pump at low ambient temperatures[J].International Journal of thermal Sciences, 2014, 43: 26-35.
[18]	HU B, WANG X L, CAO F,et al.Experimental analysis of an air-source trans-critical CO2 heat pump water heater using the hot gas bypass defrosting method[J].Applied Thermal Engineering, 2014, 71: 528-535.
[19]	TAO B, GANG Y, JIAN L Y.Thermodynamic analyses on an ejector enhanced CO2 trans-critical heat pump cycle with vapor-injection[J].International Journal of Refrigeration, 2015, 58: 22-33.
[20]	Dorin Software.About Compressor Selection.[EB/OL].[2015-12-01] http://www.dorin.com/jsp/Template2/HomePage.jsp.

低温下提高CO₂空气源热泵进水温度对系统性能的影响

Effects of inlet water temperature of air source carbon dioxide heat pump on system performance under low-temperature climate conditions

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