Experimental study of frosting on wavy plate

doi:10.11949/j.issn.0438-1157.20170630

CIESC Journal ›› 2017, Vol. 68 ›› Issue (S1): 191-195.DOI: 10.11949/j.issn.0438-1157.20170630

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Experimental study of frosting on wavy plate

MA Qiang, WU Xiaomin, ZHU Bei

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:2017-05-16 Revised:2017-05-23 Online:2017-08-31 Published:2017-08-31
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).

波纹表面结霜的实验研究

马强, 吴晓敏, 朱贝

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,wuxiaomin@tsinghua.edu.cn
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:

For heat exchangers operating with low air temperature and high humidity,frost appears on the fin surfaces,which increases the thermal resistance and blocks the air channels. Frosting process on a wavy plate was experimentally investigated. 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 velocity and the plate structure. The results show that the condensate droplets are smaller and freeze earlier with lower cooling surface temperature. The frost layer grows faster with lower cooling surface temperature and higher air velocity. Compared with flat plates,frost height growth on wavy plates is much slower.

Key words: phase change, surface, heat transfer, frosting, water droplet freezing, frost height

摘要：

结霜工况下，换热器翅片表面结霜会增大换热热阻，堵塞空气流道。在低温高湿条件下对波纹表面的结霜过程进行了实验研究，分析了冷面温度、湿空气流速及波纹结构等因素对波纹表面冷凝水珠冻结和霜层生长的影响。结果表明：冷面温度越低，冻结的冷凝水珠越小，冻结时间也越短；冷面温度越低或湿空气流速越快，霜层生长越快；在相同的实验条件下，波纹表面上霜层的高度比平直表面的低。

关键词: 相变, 表面, 传热, 结霜, 水珠冻结, 霜层高度

CLC Number:

TK123

MA Qiang, WU Xiaomin, ZHU Bei. Experimental study of frosting on wavy plate[J]. CIESC Journal, 2017, 68(S1): 191-195.

马强, 吴晓敏, 朱贝. 波纹表面结霜的实验研究[J]. 化工学报, 2017, 68(S1): 191-195.

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Experimental study of frosting on wavy plate

波纹表面结霜的实验研究

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