高储能密度三相吸收式储热系统的设计与测试  

Design and Test of a Three-Phase Absorption Thermal Storage System with High Energy Storage Density

作　　者：游锦方 高金彤 闵恒 刘巍巍 江龙 王如竹[1] 徐震原[1] You Jinfang;Gao Jintong;Min Heng;Liu Weiwei;Jiang Long;Wang Ruzhu;Xu Zhenyuan(Institute of Refrigeration of Cryogenics,Shanghai Jiao Tong University,Shanghai,200240,China;China Con-struction Third Engineering Bureau Co.,Ltd.,Wuhan,430064,China)

机构地区：[1]上海交通大学制冷与低温工程研究所,上海200240 [2]中建三局集团有限公司,武汉430064

出　　处：《制冷学报》2024年第6期33-40,共8页Journal of Refrigeration

基　　金：国家自然科学基金(52293411)资助项目。

摘　　要：吸收式储热是一种储能密度高且储热周期长的储热技术,是存储太阳热能并解决太阳热能在不同季节间供需不匹配问题的关键。传统的吸收式系统通过限制溶液的浓度来避免结晶的出现,从而避免对机组的可靠性和安全性构成威胁,但也导致系统储能密度有限。设计并测试了一台闭式三相吸收式储热系统。该系统通过滤筒的过滤和高位进液、加热棒的熔晶以及对溶液循环回路的冲洗等设计,使得溶液出现结晶后机组能够正常运行,增大机组可运行的浓度范围,提升吸收式储热系统的储能密度。样机经过测试,其在供热时的储能密度可达220 kW·h/m^(3),相对于传统的两相吸收式储热系统其储能密度提升114%,表明利用结晶的三相吸收式储热技术有望实现高密度太阳能跨季节储热。Absorption thermal storage,as a type of thermal storage technology with a high energy storage density and long thermal storage period,is the key to storing solar thermal energy and solving the mismatch between solar thermal energy supply and demand during different seasons.Traditional absorption systems avoid crystallization by limiting the solution concentration,which assures reliability and safety but causes a limited energy storage density of the system.In this study,a closed three-phase absorption heat storage system is designed and tested.Through filtering and high-level inlet by the filters,crystal fusion by the heating rods,and flushing of the solution circulation lines,the system can operate normally after the solution crystallization,increase the concentration glide,and improve the energy storage density.Testing shows that the energy storage density of the system can reach 220 kW·h/m^(3)upon heat supply,which is an 114%increase compared to traditional two-phase absorption heat storage systems.Hence,the three-phase absorption heat storage technology with the utilization of crystallization is expected to realize high-density long-term solar energy thermal storage.

关 键 词：吸收式储热 储能密度 结晶 样机设计 太阳能 

分 类 号：TB611[一般工业技术—制冷工程] TK512[动力工程及工程热物理—热能工程]