大容量热化学吸附储热原理及性能分析

doi:10.3969/j.issn.2095-4239.2014.03.008

储能科学与技术 ›› 2014, Vol. 3 ›› Issue (3): 236-243.doi: 10.3969/j.issn.2095-4239.2014.03.008

大容量热化学吸附储热原理及性能分析

李廷贤¹, 李卉², 闫霆¹, 王如竹¹

1上海交通大学制冷与低温工程研究所,上海 200240;
2中国船舶重工集团公司第704研究所,上海 200031

收稿日期:2013-09-23 出版日期:2014-05-01 发布日期:2014-05-01
作者简介:第一作者及通讯联系人:李廷贤(1979--)男,博士,主要研究方向为热化学吸附制冷及太阳能热储存,E-mail:litx@sjtu.edu.cn.
基金资助:
国家自然科学基金项目(51276211)

Performance analysis of high-capacity thermal energy storage using solid-gas thermochemical sorption Principle

LI Tingxian¹, LI Hui², YAN Ting¹, WANG Ruzhu¹

1Institute of Refrigeration and Cryogenics,Shanghai Jiaotong University,Shanghai 200240,China;
2No.704 Research Institute,China Shipbuilding Industry Corporation,Shanghai 200031,China

Received:2013-09-23 Online:2014-05-01 Published:2014-05-01

摘要/Abstract

摘要： 储能技术是提高能源利用效率的一种有效手段,可有效调配能量供给与需求在时间,空间和强度上的匹配关系,传统显热储存技术和相变潜热储存技术的储热密度一般在100~200 kJ/kg,储热能力较低不利于规模化应用.本工作提出一种基于固-气化学反应的大容量热化学吸附储热方法,利用吸附工质对在化学反应过程中热能与化学吸附势能的相关转化实现热量的储存和释放,具有高效储热的显著优点.采用4种典型温区的吸附储热工质对为例进行了热化学吸附储热热力循环特性及工作性能的理论研究,在此基础上对不同温区吸附储热工质对(50~280 ℃)的热化学物性参数,储热温度,储热密度进行了分析比较,以期实现不同温度品位的热量储存.结果表明:热化学吸附储热技术的反应盐储热密度高达2000 kJ/kg以上,其储能密度约为传统显热储存技术和相变潜热储存技术的10~20倍,是一种具有发展潜力的大容量,高性能储热方法,该新技术可为规模化工业储热应用及太阳能等可再生能源的高效利用提供技术支撑.

关键词: 热化学吸附, 化学反应, 热量储存, 热量释放, 热力循环, 储热密度

Abstract: Energy storage is an effective technology for improving the energy utilization efficiency, and it can be used to adjust the instability and time-discrepancy between energy supply and energy demand. The conventional sensible and latent heat storage technologies have energy densities ranging from 100 kJ/kg to 200 kJ/kg. The low storage capacity usually hinders their application in large-scale situation. A potential solid-gas thermochemical sorption method is proposed in the paper for achieving the high-capacity thermal energy storage with little heat losses. Thermal energy is stored in form of chemical bonds resulting from thermochemical sorption process of solid-gas working pair. The operating principle and working performance is described and analyzed using four typical sorption working pairs with different working temperatures, and the candidates of possible working pairs are presented for thermal energy storage with a temperature range between 50~280℃. Thermodynamic analysis showed that the advanced thermochemical sorption energy storage method has a distinct advantage of high energy density when compared with conventional sensible and latent heat storage methods. An energy density higher than 2000 kJ/kg of salt was obtained by employing the proposed thermochemical sorption energy storage technology, and it was about 10~20 times the energy density obtained with sensible and latent heat storage. The presented thermochemical sorption energy storage is a potential high-capacity heat storage method, and thus it can promote the application of thermal energy storage in large-scale industrial processes and the utilization of renewable energy.

Key words: thermochemical sorption, chemical reaction, energy storage, energy release, thermodynamic cycle, energy density

中图分类号:

TK02

李廷贤, 李卉, 闫霆, 王如竹. 大容量热化学吸附储热原理及性能分析[J]. 储能科学与技术, 2014, 3(3): 236-243.

LI Tingxian, LI Hui, YAN Ting, WANG Ruzhu. Performance analysis of high-capacity thermal energy storage using solid-gas thermochemical sorption Principle[J]. Energy Storage Science and Technology, 2014, 3(3): 236-243.

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大容量热化学吸附储热原理及性能分析

Performance analysis of high-capacity thermal energy storage using solid-gas thermochemical sorption Principle

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