Influence of geometry on the thermal performance of water pit seasonal heat storages for solar district heating

doi:10.1007/s12273-020-0671-9

	Influence of geometry on the thermal performance of water pit seasonal heat storages for solar district heating
	Bai, Yakai 1,2,3,4; Yang, Ming 1,2,5,6; Fan, Jianhua 4; Li, Xiaoxia7 ; Chen, Longfei 1; Yuan, Guofeng 1,2,5,6; Wang, Zhifeng 1,2,3,5,6
	2021-06
发表期刊	Building Simulation
ISSN	19963599
卷号	14 期号:3 页码:579-599
摘要	The aim of the study is to investigate the influence of geometry on the thermal capacity and stratifications of a water pit heat storage for solar district heating. A TRNSYS component model for a truncated cone water pit was developed based on the coordinate transformation method and validated by experimental results from the water pit heat storage in Huangdicheng in 2018. The thermal performance of 26 water pits with different heights and side wall slopes was calculated for 10 consecutive years. It takes four to six years for the water pit to reach steady-state operation. The operation data from the tenth year was selected to evaluate the thermal performance of each configuration. The results show that because of the thermal insulation on top of the water pit, the height to diameter ratio of a water pit with minimum annual heat loss was always smaller than 1.0. The annual storage efficiency of a water pit increases with side wall slope due to the reduced side wall area. There is an almost linear increase in the thermal stratification number of a water pit with height. With an increase in the height, thermal stratification in water pits with a steeper slope increased more gradually than water pits with a lower slope. The findings in this paper are relevant for the design optimization of water pits as seasonal thermal energy storages. © 2020, Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature.
关键词	Digital storage District heating Heat storage Thermal stratification Coordinate transformation methods Design optimization Different heights Height-to-diameter ratio Seasonal heat storages Steady-state operation Storage efficiency Thermal Performance
DOI	10.1007/s12273-020-0671-9
收录类别	EI ; SCIE
语种	英语
WOS研究方向	Thermodynamics ; Construction & Building Technology
WOS类目	Thermodynamics ; Construction & Building Technology
WOS记录号	WOS:000568024600001
出版者	Tsinghua University
EI入藏号	20203709162811
EI主题词	Thermal insulation
EI分类号	413.2 Heat Insulating Materials - 643.1 Space Heating - 722.1 Data Storage, Equipment and Techniques
来源库	Compendex
引用统计	被引频次：8[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/147174
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.Tech Univ Denmark, Dept Civil Engn, Brovej 118, DK-2800 Lyngby, Denmark; 5.Chinese Acad Sci, Inst Elect Engn, Joint Lab, Beijing 100190, Peoples R China; 6.Guangdong Five Star Solar Energy Co Ltd, Beijing 100190, Peoples R China; 7.Lanzhou Univ Technol, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Bai, Yakai,Yang, Ming,Fan, Jianhua,et al. Influence of geometry on the thermal performance of water pit seasonal heat storages for solar district heating[J]. Building Simulation,2021,14(3):579-599.
APA	Bai, Yakai.,Yang, Ming.,Fan, Jianhua.,Li, Xiaoxia.,Chen, Longfei.,...&Wang, Zhifeng.(2021).Influence of geometry on the thermal performance of water pit seasonal heat storages for solar district heating.Building Simulation,14(3),579-599.
MLA	Bai, Yakai,et al."Influence of geometry on the thermal performance of water pit seasonal heat storages for solar district heating".Building Simulation 14.3(2021):579-599.

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