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Title: The heat transfer mechanism study of three-tank latent heat storage system based on entransy theory
Author: Guo, Jiangfeng1; Huai, Xiulan1
Source: INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
Issued Date: 2016-06-01
Volume: 97, Pages:191-200
Keyword: Three-tank latent heat storage ; Heat transfer ; Entransy dissipation number ; Exergy efficiency ; Solar energy ; Heat exchanger
DOI: 10.1016/j.ijheatmasstransfer.2016.01.068
DOC Type: Article
English Abstract: A three-tank latent heat storage system in which liquid lead-bismuth eutectic alloy (LBE) is used as sensible heat storage medium, and sodium nitrate is selected as the phase change material (PCM), is proposed in the present work. The performance of thermal storage system depends chiefly upon the heat transfer performance at superheated steam stage, and the mass flow rate of LBE can be adjustable to accommodate the specific heat change of water/steam. There exists an optimal mass flow rate ratio to maximize the performance of storage system. Generally, the more uniform the temperature difference distribution is, the higher the thermal performance of the storage system. The optimal mass flow rate of liquid LBE appears under constant mass flow rate ratio condition, in which the entransy and exergy rises of steam reach the maximum. The increasing number of transfer units at superheated steam stage improves the thermal storage performance monotonously. The exergy efficiency of this storage system runs at more than 80% through proper parameters setting. (C) 2016 Elsevier Ltd. All rights reserved.
WOS Headings: Science & Technology ; Physical Sciences ; Technology
WOS Subject: Thermodynamics ; Engineering, Mechanical ; Mechanics
WOS Subject Extended: Thermodynamics ; Engineering ; Mechanics
WOS Keyword Plus: THERMAL-ENERGY STORAGE ; DIRECT STEAM-GENERATION ; DISSIPATION EXTREMUM PRINCIPLE ; BRAYTON CYCLE SYSTEM ; TROUGH POWER-PLANTS ; OPTIMIZATION DESIGN ; EXCHANGER NETWORKS ; THERMODYNAMIC ANALYSIS ; BALANCE EQUATION ; WORK CONVERSION
Indexed Type: SCI
Funder: National Natural Science Foundation of China(51206166) ; Youth Innovation Promotion Association CAS(2014128)
Language: 英语
WOS ID: WOS:000374616900018
Citation statistics:
Content Type: 期刊论文
URI: http://ir.etp.ac.cn/handle/311046/112505
Appears in Collections:中国科学院工程热物理所(论文库)_期刊论文(SCI)

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description.institution: 1.Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China
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