Influences of inclination and cooling condition on heat transfer performance of closed loop plate pulsating heat pipe with parallel channels

doi:10.3969/j.issn.0438-1157.2014.02.023

CIESC Journal ›› 2014, Vol. 65 ›› Issue (2): 532-537.DOI: 10.3969/j.issn.0438-1157.2014.02.023

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Influences of inclination and cooling condition on heat transfer performance of closed loop plate pulsating heat pipe with parallel channels

SHI Weixiu^1,2, PAN Lisheng³, LI Weiyi⁴

1 School of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China;
2 Beijing Key Laboratory of Heating, Gas Supply, Ventilating and Air Conditioning Engineering, Beijing 100044, China;
3 State Key Laboratory of High-temperature Gas Dynamics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China;
4 School of Mechanical Engineering, Tianjin University, Tianjin 300072, China

Received:2013-04-22 Revised:2013-08-05 Online:2014-02-05 Published:2014-02-05
Supported by:
supported by Beijing Key Laboratoy of Heating,Gas Supply, Ventilating and Air Conditioning Engineering(NR2013K07), 2013 construction projects of thermal energy and power engineering (04720413003) and Scientific Research Fund Project for Beijing University of Civil Engineering and Architecture.

倾角及冷却工况对多通路并联回路板式脉动热管传热性能的影响

史维秀^1,2, 潘利生³, 李惟毅⁴

1 北京建筑大学环境与能源工程学院, 北京 100044;
2 北京建筑大学供热供燃气通风及空调工程北京市重点实验室, 北京 100044;
3 中国科学院力学研究所, 高温气体动力学国家重点实验室, 北京 100190;
4 天津大学机械工程学院, 天津 300072

通讯作者: 史维秀（1983- ），女，博士，讲师。
基金资助:
供热供燃气通风及空调工程北京市重点实验室研究基金项目（NR2013K07）；2013年热能动力工程专业建设项目（04720413003）；北京建筑大学科学研究基金项目。

Abstract

Abstract: An experimental setup was established based on a closed loop plate pulsating heat pipe with parallel channels and a series of experiments were conducted to study its operational performance with acetone and ethanol. Heating copper block and cold water bath were adopted as thermal conditions in the experiments. The characteristics were investigated for different inclinations (90°, 75°, and 60°) and cooling conditions (4.5 and 9.0 g·s^-1). The heat-transfer performance of the pulsating heat pipe was mainly evaluated by thermal resistance and wall temperature. The results show that gravity has great influence on the heat transfer. At smaller inclination, thermal resistance is larger and heat transfer limit is lower. Heating power and cooling capacity need to be matched each other, and heat transfer limit will be higher with higher matching degree, especially with inclination. There is a best mass flow rate during the operation, and the thermal resistance is the lowest under the best cooling condition.

Key words: closed loop with parallel channels, plate pulsating heat pipe, inclination, cooling condition, heat transfer performance

摘要： 针对多通路并联回路板式脉动热管建立实验台，采用铜质模块加热和水浴冷却方式作为热工条件，着重考察脉动热管在不同倾角（90°，75°，60°）及冷却工况（4.5 g·s^-1和9.0 g·s^-1）下的传热性能，通过壁面温度的振荡和传热热阻来评价其传热效果。实验结果表明，重力对多通路并联回路板式脉动热管传热性能的影响较大，随着倾角的减少，工质的回流变弱，传热热阻变大，传热极限变低；脉动热管的加热功率与冷却能力是相互匹配的，匹配度越高，脉动热管越不易干烧，传热极限越高，在有倾角的工况下提高传热极限表现得更为明显；脉动热管运行时存在一个最佳水流量，在最佳冷却工况下，脉动热管的运行热阻最低。

关键词: 多通路并联回路, 板式脉动热管, 倾角, 冷却工况, 传热性能

CLC Number:

TK124

SHI Weixiu, PAN Lisheng, LI Weiyi. Influences of inclination and cooling condition on heat transfer performance of closed loop plate pulsating heat pipe with parallel channels[J]. CIESC Journal, 2014, 65(2): 532-537.

史维秀, 潘利生, 李惟毅. 倾角及冷却工况对多通路并联回路板式脉动热管传热性能的影响[J]. 化工学报, 2014, 65(2): 532-537.

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Influences of inclination and cooling condition on heat transfer performance of closed loop plate pulsating heat pipe with parallel channels

倾角及冷却工况对多通路并联回路板式脉动热管传热性能的影响

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