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北京建筑大学供热供燃气通风及空调工程北京市重点实验室 北京 100044
王刚,男,副教授,北京建筑大学环境与能源工程学院,15911066230,E-mail:wanggang@bucea.edu.cn。研究方向:吸收式热泵及热化学蓄能技术。Wang Gang, male, associate professor, School of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, 86-15911066230, E-mail:wanggang@bucea.edu.cn. Research fields: absorption heat pumps and thermochemical energystorage technology.
收稿:2025-08-18,
修回:2025-09-20,
录用:2025-10-14,
网络首发:2026-03-24,
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Zhao Yonghan Wang Gang Chen Zehua Yang Hui.Experimental Investigation on the Thermochemical Energy Storage Characteristics of Lithium Bromide[J].Journal of Refrigeration,
赵泳涵,王刚,陈泽华等.溴化锂热化学蓄能特性的实验研究[J].制冷学报, DOI:10.12465/issn.0253-4339.20250818001. CSTR: XXXXX.XX.XXX.20250818001.
Zhao Yonghan Wang Gang Chen Zehua Yang Hui.Experimental Investigation on the Thermochemical Energy Storage Characteristics of Lithium Bromide[J].Journal of Refrigeration, DOI:10.12465/issn.0253-4339.20250818001. CSTR: XXXXX.XX.XXX.20250818001.
热化学蓄能是解决太阳能作为供给侧与用能侧之间在时间、空间和能量强度上不匹配问题的关键技术。本文以溴化锂溶液为研究对象,实验研究了溴化锂溶液结晶过程热化学蓄能的蓄能密度、蓄能速率和蓄能效率等特性,分析了各因素的敏感性。结果表明:蓄能速率和蓄能效率与热源温度呈正相关,当溴化锂溶液质量分数为55%,热源温度由100 ℃升至140 ℃时,蓄能速率和蓄能效率分别提升89.1%和18%;溴化锂溶液质量分数对性能的影响呈非线性,并存在最优质量分数区间,溶液初始质量分数由55%升至63%,蓄能密度平均下降15.9%,蓄能效率提升31%;系统蓄能特性与冷却水温度呈负相关,冷却水温度由10 ℃升至30 ℃,蓄能速率与效率平均分别下降46.7%与35.4%。冷却水温度对蓄能速率与效率的影响最为强烈且稳定,是当前工况下限制系统性能的主导因子。
Thermochemical energy storage is a promising solution for addressing the temporal, spatial, and intensity mismatch between solar energy supply and demand. This study experimentally investigates the crystallization-based energy storage characteristics of lithium bromide solution, focusing on the energy storage density, rate, and efficiency, along with a sensitivity analysis of key parameters. The results showed that the energy storage rate and efficiency increased with the source temperature. At a 55% mass fraction, increasing the heat source temperature from 100 ℃ to 140 ℃ enhances the energy storage rate and efficiency by 89.1% and 18%, respectively. The performance response to the solution mass fraction was nonlinear, with an optimal mass fraction range; as the initial mass fraction increased from 55% to 63%, the average storage density decreased by 15.9%, while the efficiency increased by 31%. Storage characteristics are negatively correlated with cooling water temperature; as it increases from 10 ℃ to 30 ℃, the energy storage rate and efficiency decrease by an average of 46.7% and 35.4%, respectively. Of all the factors, the cooling water temperature exerts the most consistent and significant negative impact on system performance, making it the primary limiting factor under current operating conditions.
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