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

KOU Hongqiao; LUO Huilong; DU Hongru; DU Peijian; LANG Feng; LIN Bianqi

doi:10.11949/j.issn.0438-1157.20160981

您当前的位置：

首页 >

文章列表页 >

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

更新时间：2025-11-26

- Effects of inlet water temperature of air source carbon dioxide heat pump on system performance under low-temperature climate conditions
- CIESC Journal Issue S2, Pages: 378-385(2016)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20160981
  CLC： K114
- Online First：30 December 2016，
  
  Published：30 December 2016
- 稿件说明：
移动端阅览
KOU Hongqiao, LUO Huilong, DU Hongru, et al. Effects of inlet water temperature of air source carbon dioxide heat pump on system performance under low-temperature climate conditions[J]. CIESC Journal, 2016, (S2): 378-385.
DOI：

KOU Hongqiao, LUO Huilong, DU Hongru, et al. Effects of inlet water temperature of air source carbon dioxide heat pump on system performance under low-temperature climate conditions[J]. CIESC Journal, 2016, (S2): 378-385. DOI： 10.11949/j.issn.0438-1157.20160981.

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℃。

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℃.

关键词

Keywords

references

Views

138

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Development and testing of an independent two-stage valved linear compressor for space applications

Simulation of gas bearings in carbon dioxide linear compressors

Experimental research on risk of freezing and plugging during CO2 pipeline venting under throttling effect

System performance and defrosting test of new air-water double source composite heat pump system

Effect of mixing chamber diameter on performance of transcritical CO2 heat pump system with ejector

Related Author

SHA Xinquan

HU Ran

DING Lei

JIANG Zhenhua

WU Yinong

KONG Fanchen

ZHANG Shuo

TANG Mingsheng

Related Institution

Shanghai Institute of Technical Physics, Chinese Academy of Sciences

University of Chinese Academy of Sciences

Technical Institute of Physics and Chemistry, Chinese Academy of Sciences

Key Laboratory of Cryogenic Science and Technology

CNPC Xinjiang Petroleum Design Branch

⁰