Influence of Cooling Water Flow Rate on Start and Heat Transfer Performance of Pulsating Heat Pipe at Different Inclination Angles

doi:10.3390/su15031921

	Influence of Cooling Water Flow Rate on Start and Heat Transfer Performance of Pulsating Heat Pipe at Different Inclination Angles
	Shi, Weixiu ; Liu, Xuebing 1; Su, Xiaoyang 1; Chen, Hongdi 1; Pan LS(潘利生)
发表期刊	SUSTAINABILITY
	2023-02
卷号	15 期号:3 页码:1921
摘要	Pulsating heat pipe (PHP) is an efficient heat transfer technology applied in the fields of heat dissipation and energy utilization. There are many factors affecting the heat transfer of PHP, including working fluid, filling ratio, inclination angle, etc. The cooling capacity of the cooling water system at the condensing section to the working fluid is also an important factor affecting the starting and operating of PHP. The research on PHP at different cooling water flow rates is of great significance for enhancing the operating performance. An experimental investigation of starting and running performance is carried out on a closed loop PHP with ultrapure water under different inclination angles of 90 degrees, 60 degrees and 30 degrees. The starting and heat transfer performance of PHP with a filling ratio of 50% is obtained by adjusting the heat input in the range of 30 210 W at different cooling water flow rates of 6.7 g/s, 9.7 g/s and 13.9 g/s. The temperature and heat transfer resistance are used for analyzing the heat transfer performance. The results show that the starting mode, initial pulsating temperature and different heat transfer effects are brought about by different cooling water flow rates. It is observed that the cooling water flow rate has no obvious influence on the starting mode of PHP and that the starting mode of PHP is temperature progressive, starting with the increase in cooling water flow rates at a heating input of about 30 W. The influence of cooling water flow rates on the heat transfer performance of PHP is affected in a different way by inclination angles. The heat transfer performance of PHP with an inclination angle of 90 degrees is similar at 6.7 g/s, 9.7 g/s and 13.9 g/s but, under the condition of 60 degrees and 30 degrees, the heat transfer resistance drops within a certain range effectively with an increasing cooling water flow rate from 6.7 g/s to 9.7 g/s and the heat transfer performance does not change significantly with the cooling water flow rate increasing to 13.9 g/s. Thus, there is an optimal value for the cooling water flow rate during the operating of PHP. The inclination angle also has an important effect on the temperature pulsating, and the temperature of PHP affected by gravity is stable with an inclination angle of 90 degrees. However, the reduced influence of gravity on the backflow of the working fluid drops when the inclination angle decreases from 90 degrees to 30 degrees, and the wall temperature increases due to local overheating when the high heat input occurs.
关键词	pulsating heat pipe cooling water flow rate start inclination angle heat transfer performance
DOI	10.3390/su15031921
收录类别	SCI
语种	英语
WOS记录号	WOS:000929595600001
WOS研究方向	Green & Sustainable Science & Technology ; Environmental Sciences ; Environmental Studies
WOS类目	Science & Technology Other Topics ; Environmental Sciences & Ecology
项目资助者	National Natural Science Foundation of China [52000008] ; R&D Program of Beijing Municipal Education Commission [KM202310016008]
论文分区	二类
力学所作者排名	1
RpAuthor	Pan, LS (corresponding author), Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China.
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/91785
专题	高温气体动力学国家重点实验室
作者单位	1.Beijing Univ Civil Engn & Architecture, Beijing Engn Res Ctr Sustainable Energy & Bldg, Beijing 100044, Peoples R China 2.Beijing Univ Civil Engn & Architecture, Sch Environm & Energy Engn, Beijing 100044, Peoples R China 3.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Shi, Weixiu,Liu, Xuebing,Su, Xiaoyang,et al. Influence of Cooling Water Flow Rate on Start and Heat Transfer Performance of Pulsating Heat Pipe at Different Inclination Angles[J]. SUSTAINABILITY,2023,15,3,:1921.
APA	Shi, Weixiu,Liu, Xuebing,Su, Xiaoyang,Chen, Hongdi,&潘利生.(2023).Influence of Cooling Water Flow Rate on Start and Heat Transfer Performance of Pulsating Heat Pipe at Different Inclination Angles.SUSTAINABILITY,15(3),1921.
MLA	Shi, Weixiu,et al."Influence of Cooling Water Flow Rate on Start and Heat Transfer Performance of Pulsating Heat Pipe at Different Inclination Angles".SUSTAINABILITY 15.3(2023):1921.

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