Thermal stratification in a cylindrical tank due to heat losses while in standby mode

doi:10.1016/j.solener.2018.12.063

	Thermal stratification in a cylindrical tank due to heat losses while in standby mode
	Bai, Yakai 1,2,3,4; Yang, Ming 1,2,3,4,5; Wang, Zhifeng 1,2,3,4,5; Li, Xiaoxia1,2,4,6 ; Chen, Longfei 1,2,4,6
	2019-06
发表期刊	SOLAR ENERGY
ISSN	0038-092X
卷号	185 页码:222-234
摘要	The liquid in an energy storage tank will become thermally stratified during cooling of the tank when the tank is not charging or discharging. This process is studied here experimentally and numerically. A two-dimensional model validated against experimental data is used to study the thermal stratification mechanisms during cooling. The results show that natural convection mainly along the upper side of the cylindrical tank creates a boundary layer along the sidewall that drives cooled water down the side. The two-dimensional analysis is used to create a one-dimensional model for the cooling process that is validated against the experimental data. The one-dimensional model is then used to investigate the influence of the height to diameter aspect ratio on the cooling process. A tank with an aspect ratio of 1:1 has the highest energy efficiency, highest exergy efficiency, and lowest entropy generation during cooling. Further study shows that when the aspect ratio is smaller than 3, the thermal stratification increases greatly with increasing aspect ratio. Aspect ratios bigger than 3 have little influence on the thermal stratification.
关键词	Heat loss Thermal stratification CFD Energy storage Cylindrical tank
DOI	10.1016/j.solener.2018.12.063
收录类别	SCI ; SCIE
语种	英语
资助项目	Guangdong Innovative and Entrepreneurial Research Team Program[2013N070]
WOS研究方向	Energy & Fuels
WOS类目	Energy & Fuels
WOS记录号	WOS:000471087200019
出版者	PERGAMON-ELSEVIER SCIENCE LTD
EI入藏号	20191706828921
EI主题词	Aspect ratio
EI分类号	525.2 Energy Conservation - 525.7 Energy Storage - 619.2 Tanks - 641.1 Thermodynamics - 641.2 Heat Transfer - 722.1 Data Storage, Equipment and Techniques - 723.5 Computer Applications
引用统计	被引频次：18[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/31851
专题	能源与动力工程学院
通讯作者	Wang, Zhifeng
作者单位	1.Chinese Acad Sci, Key Lab Solar Thermal Energy & Photovolta Syst, Beijing 100190, Peoples R China; 2.Chinese Acad Sci, Inst Elect Engn, Beijing 100190, Peoples R China; 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 4.Beijing Engn Res Ctr Solar Thermal Power, Beijing 100190, Peoples R China; 5.Guangdong Fivestar Solar Energy Co Ltd, Dongguan 523058, Guangdong, Peoples R China; 6.Lanzhou Univ Technol, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Bai, Yakai,Yang, Ming,Wang, Zhifeng,et al. Thermal stratification in a cylindrical tank due to heat losses while in standby mode[J]. SOLAR ENERGY,2019,185:222-234.
APA	Bai, Yakai,Yang, Ming,Wang, Zhifeng,Li, Xiaoxia,&Chen, Longfei.(2019).Thermal stratification in a cylindrical tank due to heat losses while in standby mode.SOLAR ENERGY,185,222-234.
MLA	Bai, Yakai,et al."Thermal stratification in a cylindrical tank due to heat losses while in standby mode".SOLAR ENERGY 185(2019):222-234.

条目包含的文件		下载所有文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
Bai-2019-Thermal str（4082KB）	期刊论文	出版稿	开放获取	CC BY-NC-SA	浏览下载