Effects of Fin Type of Evaporator on Frosting Characteristics of Air Source Heat Pump Unit

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Effects of Fin Type of Evaporator on Frosting Characteristics of Air Source Heat Pump Unit

更新时间：2025-05-08

- Effects of Fin Type of Evaporator on Frosting Characteristics of Air Source Heat Pump Unit
- Vol. 43, Issue 1, Pages: 67-71(2009)
- 作者机构：
  
  1. 天津商业大学天津市制冷技术重点实验室,天津,300134
  2. 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： TB657
- Online First：10 January 2009，
  
  Published：2009
- 稿件说明：
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Effects of Fin Type of Evaporator on Frosting Characteristics of Air Source Heat Pump Unit[J]. 2009, 43(1): 67-71.
DOI：

Effects of Fin Type of Evaporator on Frosting Characteristics of Air Source Heat Pump Unit[J]. 2009, 43(1): 67-71. DOI：

摘要

对使用条缝翅片管换热器的空气源热泵空调器在结霜工况下的动态性能进行了试验研究

用显微照相法测量了不同条件下室外换热器表面的霜层厚度

并与采用平翅片管换热器的热泵样机试验结果进行了比较.结果表明:在结霜初始阶段

条缝翅片管换热器表面霜层增长速度远大于平翅片管换热器

结霜循环周期大大缩短; 对于低相对湿度工况

条缝翅片管换热器在结霜过程中出现了一段表面霜层厚度几乎不增长的时间段

使得其结霜周期显著增大; 与使用平翅片管换热器的热泵样机不同

使用条缝翅片管蒸发器的热泵机组的制热量及性能系数随环境空气相对湿度的升高而大幅度降低.

Abstract

Experiments on the dynamic performance of an air source heat pump(ASHP)unit with split fin-tube heat exchangers were conducted under frosting conditions. The frost thickness on the evaporator was measured with a microscope. The experimental results indicate that in the initial frosting stage

the growth rate of the frost thickness on the split fin-tube heat exchanger was much greater than that on the plane fin-tube heat exchanger

and thus the frosting duration shortened significantly. Under low air relative humidity conditions

there was a period during which the frost thickness on the split fin-tube evaporator was almost invariable

leading to a longer frosting duration. Unlike the ASHP unit with the plane fin-tube evaporator

the heating capacity and the coefficient of performance of the ASHP unit with the split fin-tube evaporator decreased significantly with the increase of the air relative humidity.

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references

KONDEPUDI S N, O'NEAL D L. Effect of frost growth on the performance of louvered finned tube heat exchangers [J]. Int J Refrigeration, 1989, 12(3): 151-158.

KONDEPUDI S N, O'NEAL D L. The effects of different fin configurations on the performance of finned-tube heat exchangers under frosting conditions [J]. ASHRAE Trans, 1990, 96(2): 439-444.

KONDEPUDI S N, O'NEAL D L. Frosting performance of tube heat exchangers with wavy and corrugated fins [J]. J Experimental Thermal and Fluid Science, 1991, 4(5): 613-618.

郭宪民,王成生,汪伟华,等. 结霜工况下空气源热泵动态特性的数值模拟与实验验证[J]. 西安交通大学学报,2006, 40(5):544-548.

GUO Xianmin, WANG Chengsheng, WANG Weihua, et al. Numerical simulation and experimental verification on dynamic performance of air source heat pump under frosting conditions [J]. J of Xi'an Jiaotong University, 2006, 40(5): 544-548.

郭宪民,陈轶光,汪伟华,等.室外环境参数对空气源热泵翅片管蒸发器动态结霜性能的影响[J].制冷学报,2006,27(6):29-33.

GUO Xianmin, CHEN Yiguang, WANG Weihua, et al. The effects of the outdoor air parameters on the frosting characteristics of the fin-tube evaporator coils of an air source heat pump[J]. J of Refrigeration, 2006, 27(6): 29-33.

郭宪民.空气源热泵蒸发器表面霜层生长特性及其对系统动态性能的影响[D].西安:西安交通大学能源与动力工程学院,2008.

黄虎,束鹏程,李志浩.风冷热泵冷热水机组结霜工况下运行特性的实验研究[J].流体机械,1998, 26(12): 43-47.

HUANG Hu, SU Pengcheng, LI Zhihao. Experimental study on dynamic performance of an air cooling water chiller/heater [J]. Fluid Machinery, 1998, 26(12):43-47.

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