Experimental study of frosting on horizontal plate

doi:10.11949/j.issn.0438-1157.20150324

›› 2015, Vol. 66 ›› Issue (S1): 95-99.DOI: 10.11949/j.issn.0438-1157.20150324

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Experimental study of frosting on horizontal plate

MA Qiang, WU Xiaomin, CHEN Yonggen

Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Beijing Key Laboratory of CO₂ Utilization and Reduction Technology, Department of Thermal Engineering, Tsinghua University, Beijing 100084, China

Received:2015-03-16 Revised:2015-03-26 Online:2015-06-30 Published:2015-06-30
Supported by:
supported by the Specialized Research Fund for the Doctoral Program of Higher Education of China (20130002110073) and the Tsinghua University Initiative Scientific Research Program (20131089319).

水平表面结霜过程的实验研究

马强, 吴晓敏, 陈永根

清华大学热能工程系热科学与动力工程教育部重点实验室, 北京市CO₂资源利用与减排技术重点实验室, 北京 100084

通讯作者: 吴晓敏
基金资助:
教育部高等学校博士学科点专项科研基金项目(20130002110073);清华大学自主科研计划项目(20131089319)。

Abstract

Abstract: Frosting process on a horizontal plate was experimentally investigated in this paper. This study focuses on several factors affecting the condensate water droplets freezing process and frost layer growth process, i.e. the cooling surface temperature, the air temperature and humidity, and the surface type. The results showed that the condensate droplets are smaller and freeze earlier with lower cooling surface temperature and lower humid air temperature. The water droplets freezing onset time on the hydrophobic surface is about 13 min later than on the bare aluminum surface, which means the frost process on the hydrophobic was delayed. The frost layer grows faster with lower cooling surface temperature and higher air velocity.

Key words: phase change, surface, heat transfer, freezing onset time, frost crystals shape, frost height

摘要： 对水平表面在低温高湿条件下结霜过程进行实验研究, 分析了冷面温度、湿空气温度和表面特性等因素对水珠冻结和霜层生长的影响。结果表明:冷面温度越低, 过冷水珠冻结时间越短、冻结直径越小;在湿空气温度与冷面温度温差相等的条件下, 湿空气温度越低, 过冷水珠冻结时间越短、冻结直径越小;疏水表面上过冷水珠的冻结时间比裸铝表面晚。冷面温度越低, 湿空气流速越快, 则霜层生长越快。

关键词: 相变, 表面, 传热, 冻结时间, 霜晶形貌, 霜层高度

CLC Number:

TK123

MA Qiang, WU Xiaomin, CHEN Yonggen. Experimental study of frosting on horizontal plate[J]. , 2015, 66(S1): 95-99.

马强, 吴晓敏, 陈永根. 水平表面结霜过程的实验研究[J]. CIESC Journal, 2015, 66(S1): 95-99.

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Experimental study of frosting on horizontal plate

水平表面结霜过程的实验研究

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