Influence of Airflow Maldistribution on Performance of Air-to-Water Heat Pump System under Frosting Conditions

龚建英; 袁秀玲; 黄东; 张兴群

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Influence of Airflow Maldistribution on Performance of Air-to-Water Heat Pump System under Frosting Conditions

更新时间：2025-12-08

- Influence of Airflow Maldistribution on Performance of Air-to-Water Heat Pump System under Frosting Conditions
- Vol. 41, Issue 9, Pages: 1058-1061(2007)
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： TB65
- Online First：10 September 2007，
  
  Published：2007
- 稿件说明：
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龚建英, 袁秀玲, 黄东, et al. Influence of Airflow Maldistribution on Performance of Air-to-Water Heat Pump System under Frosting Conditions[J]. 2007, 41(9): 1058-1061.
DOI：

龚建英, 袁秀玲, 黄东, et al. Influence of Airflow Maldistribution on Performance of Air-to-Water Heat Pump System under Frosting Conditions[J]. 2007, 41(9): 1058-1061. DOI：

摘要

针对一台名义制冷量为50 kW的风冷热泵冷热水机组

研究了风速不均匀分布对机组结霜工况性能的影响.实验结果表明:风速的不均匀分布是系统反馈控制支路产生振荡的主导因素; 随着风速不均匀度增加

结霜速度加快

致使系统的稳定工作时间缩短

系统的换热性能降低; 风速分布不均匀度为0.93与0.18时相比

系统的稳定工作时间缩短了34 min

系统的制热量降低约14.2%; 结霜振荡阶段

霜层的阻塞作用成为影响系统性能的主要因素

随着风速分布不均匀度的增加

系统参数衰减加剧.

Abstract

The experiments for different airflow maldistribution degree(AMD)were conducted on a 50 kW unitary air-to-water heat pump. The results indicate that the airflow maldistribution at the face of finned tube heat exchanger is the dominant factor which results in the hunting of the thermostatic expansion valve. With AMD increasing

the process of frosting quickens and the stable work time of the heat pump shortens. The heating capacity decreases accordingly. When AMD was 0.93 and 0.18

the stable work time of heat pump reduced 34 minutes and the heating capacity decreased by 14.2% accordingly. For the hunting stage

the frost block effect became the main factor degrading the refrigeration system performance.

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references

黄东. 风冷热泵冷热水机组结霜和初霜动态特性的研究[D]. 西安:西安交通大学能源与动力工程学院,2005.

黄虎,束鹏程,李志浩. 风冷热泵冷热水机组设计中的若干问题[J]. 制冷, 1999, 18(2): 58-61.

Huang Hu, Shu Pengcheng, Li Zhihao. Some problems on the design of air-cooled heat pump chiller[J]. Refrigenation, 1999, 18(2):58-61.

Domanski P A. Simulation of an evaporator with nonuniform one-dimensional air distribution[J]. ASHRAE Transaction, 1991, 97(1): 793-802.

Amaged E. Effect of airflow on pressure drop and thermal performance of heat exchangers in residential heat pump systems[J]. ASHRAE Transaction, 2003, 109(2): 9-14.

Chen Nan, Xu Lie, Feng Haidong, et al. Performance investigation of a finned tube evaporator under the oblique frontal air velocity distribution[J]. Applied Thermal Engineering, 2005, 25:113-125.

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