Investigation on an innovative resorption system for seasonal thermal energy storage

被引:53
作者
Jiang, L. [1 ,2 ]
Wang, R. Z. [1 ]
Wang, L. W. [1 ]
Roskilly, A. P. [2 ]
机构
[1] Shanghai Jiao Tong Univ, Inst Refrigerat & Cryogen, Shanghai 200240, Peoples R China
[2] Newcastle Univ, Sir Joseph Swan Ctr Energy Res, Newcastle NE1 7RU, England
基金
英国工程与自然科学研究理事会; 中国国家自然科学基金;
关键词
Resorption; Seasonal thermal energy storage; Solar energy; Composite sorbent; WORKING PAIRS; COMPOSITE ADSORBENT; EXPANDED GRAPHITE; SORPTION SYSTEM; PERFORMANCE; CACL2; PERMEABILITY; TECHNOLOGIES; SORBENTS; CARBON;
D O I
10.1016/j.enconman.2017.07.018
中图分类号
O414.1 [热力学];
学科分类号
摘要
An innovative resorption system is established and investigated for seasonal thermal energy storage. Solar energy is stored in form of chemical potential in summer whereas the stored energy could be released in form of sorption heat in winter. Working pair of MnCl2-CaCl2-NH3 is selected and composite sorbents are developed with expanded natural graphite treated with sulfuric acid as the matrix for heat and mass transfer intensification. It is indicated that the highest effective heat storage density, heat power density and system COP are able to reach 1047 kJ kg(-1), 402 W kg(-1) and 0.58 under the condition of 30 degrees C heat output temperature and 15 degrees C ambient temperature. Novel resorption thermal energy storage system verifies the feasibility for seasonal energy storage at high ambient temperature in winter, which reveals great potentials for solar energy utilization. Also worth noting that two possible solutions i.e. temperature upgrade mode and sorption-compression mode are analyzed and compared when ambient temperature is relatively low i.e. below 0 degrees C. Results demonstrate that heat could be supplied in term of -15 degrees C ambient temperature and 50 degrees C heat output temperature. Two methods could deal with the issues at low ambient temperature, which have their respective advantages for different applications. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码:129 / 139
页数:11
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