Evaporation Characteristics of Defrosting Retention Droplet on Fin Surface

Wang Feng; Dai Fei; Yang Weibo

doi:10.12465/j.issn.0253-4339.2024.06.152

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Evaporation Characteristics of Defrosting Retention Droplet on Fin Surface

更新时间：2024-12-13

- Evaporation Characteristics of Defrosting Retention Droplet on Fin Surface
- Journal of Refrigeration Vol. 45, Issue 6, Pages: 152-157(2024)
- 作者机构：
  
  1.东南大学能源与环境学院　南京　 210096
  2.扬州大学电气与能源动力工程学院　扬州　 225127
- 作者简介：
  
  Wang Feng, male, Ph. D., associate professor, College of Electrical, Energy and Power Engineering, Yangzhou University, 86-15150567053, E-mail：wangfengseu@163.com. Research fields: anti-frosting and defrosting of air-source heat pump.
- 基金信息：
  
  the National Natural Science Foundation of China(52006186;2020M681453);China Postdoctoral Science Foundation(2020Z303)
- DOI：10.12465/j.issn.0253-4339.2024.06.152
  CLC： TB61⁺1;TB657.5;TK124
- Published：16 December 2024，
  
  Received：12 July 2023，
  
  Revised：31 October 2023，
  
  Accepted：2023-11-14
- 稿件说明：
移动端阅览
WANG FENG, DAI FEI, YANG WEIBO. Evaporation Characteristics of Defrosting Retention Droplet on Fin Surface. [J]. Journal of refrigeration, 2024, 45(6): 152-157.
DOI：

WANG FENG, DAI FEI, YANG WEIBO. Evaporation Characteristics of Defrosting Retention Droplet on Fin Surface. [J]. Journal of refrigeration, 2024, 45(6): 152-157. DOI： 10.12465/j.issn.0253-4339.2024.06.152.

摘要

为揭示翅片表面融霜滞留液滴的蒸发特性，通过可视化实验研究了液滴尺寸、基底润湿性和倾斜角度、加热温度等因素影响下翅片表面融霜滞留液滴的蒸发过程。实验结果表明：普通铝翅片表面的液滴蒸发模式为恒定接触直径和混合模式，钉扎现象明显，而疏水翅片表面为恒定接触角和混合模式，无钉扎现象，且蒸发耗时更长；液滴在普通翅片表面的蒸发耗时随翅片倾斜角度的增大而减少，倾斜角度越大，液滴蒸发时的脱钉现象越早发生；液滴初始体积相同的情况下，随着加热温度从30 ℃升至40 ℃，液滴的蒸发耗时缩短60%。此外，液滴初始体积越大，其蒸发耗时越长，但蒸发模式不变。

Abstract

To reveal the evaporation characteristics of a defrosting retention droplet on a fin surface

the effects of droplet size

fin surface wettability

fin tilt angle

and heating temperature on the droplet evaporation process were studied by a visualization experiment. The experimental results show that the droplet evaporation modes on the bare fin surface are constant contact diameter and mixing modes

and that the pining phenomenon is obvious. Constant contact angle and mixing modes are observed on the hydrophobic fin surface

and there is no spiking phenomenon. Compared to the bare fin

the evaporation time of a droplet on the hydrophobic fin surface is longer. The evaporation time on the bare surface decreases with the increase in the tilt angle. A larger tilt angle leads to an earlier denailing phenomenon. When the initial volume of the droplet is the same

with the increase in heating temperature from 30 ℃ to 40 ℃

the evaporation time decreases by 60%. In addition

a larger initial volume of the droplet leads to a longer evaporation time

but the evaporation mode remains unchanged.

关键词

空气源热泵翅片融霜滞留液滴蒸发钉扎现象

Keywords

air-source heat pumpfindefrosting retention dropletevaporationpining phenomenon

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