[1]何桂香,谷雅秀,段佳慧.空气源热泵超疏水抑霜的机理分析及性能研究[J].西安建筑科技大学学报(自然科学版),2021,53(06):860-866.[doi:10.15986/j.1006-7930.2021.06.010 ]
　HE Guixiang,GU Yaxiu,DUAN Jiahui.Mechanism analysis and performance research on superhydrophobic frost suppression of air source heat pump[J].J. Xi'an Univ. of Arch. & Tech.(Natural Science Edition),2021,53(06):860-866.[doi:10.15986/j.1006-7930.2021.06.010 ]
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空气源热泵超疏水抑霜的机理分析及性能研究()
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西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
53
期数:
2021年06期
页码:
860-866
栏目:
出版日期:
2021-12-20

文章信息/Info

Title:
Mechanism analysis and performance research on superhydrophobic frost suppression of air source heat pump
文章编号:
1006-7930(2021)06-0860-07
作者:
何桂香1; 谷雅秀1; 段佳慧2
(1.长安大学 建筑工程学院,陕西 西安 710061; 2.广州市交通设计研究院有限公司,广东 广州510000)
Author(s):
HE Guixiang1;  GU Yaxiu1;  DUAN Jiahui2
(1.School of Civil Engineering, Chang'an University, Xi'an 710061, China; 2.Guangzhou Traffic Design and Research Institute Co., Ltd., Guangzhou 510000, China)
关键词:
空气源热泵;  超疏水;  抑霜;  融霜
Keywords:
air source heat pump;  superhydrophobic;  frost suppression;  defrosting
分类号:
TU83
DOI:
10.15986/j.1006-7930.2021.06.010
文献标志码:
A
摘要:
为解决空气源热泵室外换热器在低温潮湿的工况下运行时的结霜问题,从结霜影响因素及霜层生长条件出发,改善了一种抑霜表面改性方法,制备出接触角为158.3°的超疏水铝基翅片; 基于超疏水抑霜机理分析,并通过所建立的模拟低温、高湿环境的强制对流可视化实验平台,对超疏水铝基竖直翅片的抑霜/融霜效果进行理论及实验研究.结果表明,超疏水表面液滴成核位垒大、冰桥传播慢、液滴与冷表面接触面积小、液滴频繁发生合并-弹跳-滚动-滑落现象; 霜层初始生长阶段,超疏水铝基表面较常规铝基表面结霜时间延迟165 s、霜层覆盖率增速小; 强制对流下的结霜过程中,超疏水铝基翅片结霜量为常规铝基翅片的69.8%、生长速率为常规铝基翅片的65.2%; 融霜过程中,超疏水铝基翅片融霜时间为常规铝基翅片的64%、残留化霜水比例减少47.9%.超疏水表面表现出良好的抑制结霜、快速融霜的特性,初步揭示了超疏水技术应用于空气源热泵室外机换热器表面进行有效抑霜的可行性及其实际应用价值.
Abstract:
Based on the influencing factors and conditions of frost layer growth to suppress frost, this paper improves a surface modification method to solve the problem that the outdoor heat exchanger of air source heat pump will frost while operating under low temperature and high humidity. By this means, superhydrophobic aluminum fins with contact angle of 158.3° are prepared. To experimentally study the frost suppression / thawing effect of superhydrophobic aluminum fins, the frost suppression mechanism of superhydrophobic surface is analyzed, and a forced convection visualization experimental platform which simulates low temperature and high humidity environment is established. The results show that the superhydrophobic surface has large nucleation barrier, slow ice bridge propagation, less contact area between droplets and cold surface, and frequent merging-bouncing-rolling-sliding of droplets. In the initial growth stage of frost layer, the frosting time of superhydrophobic aluminum fin is 165 s later than that of conventional aluminum fin, and the growth rate of frost layer coverage is small. During the frosting process under forced convection, the frosting amount of superhydrophobic aluminum fin is 69.8% of that of conventional aluminum fin, and the growth rate is 65.2% of that of conventional aluminum fin. During the defrosting process, the defrosting time of superhydrophobic aluminum fin is 64% of that of conventional aluminum fin, and the proportion of residual defrosting water is reduced by 47.9%. The superhydrophobic surface shows good characteristics of inhibiting frosting and rapid defrosting. The results preliminarily reveal the feasibility and practical application value of superhydrophobic technology, which is applied to the surface of outdoor unit heat exchanger of air source heat pump.

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备注/Memo

备注/Memo:
收稿日期:2021-05-11修改稿日期:2021-11-10
基金项目:国家自然科学基金项目(51106014); 陕西省自然科学基础研究计划面上基金项目(2018JM5084); 陕西省建设厅建设科技计划管理基金项目(2015-K14); 中央高校基本科研业务费(自然科学类)高新技术研究培育项目(300102289203)
第一作者:何桂香(1998-),女,硕士生.主要从事空气热泵抑霜除霜研究.E-mail: 2020128091@chd.edu.cn 通信作者:谷雅秀(1980-),女,博士,副教授,主要从事制冷与暖通空调系统节能与优化研究.E-mail:guyaxiu@chd.edu.cn

更新日期/Last Update: 2021-12-20