太阳能热发电的多级蓄热技术研究进展  

Review on Multi-stage Thermal Storage Systems for Solar Power Generation

作　　者：邓雅军 卞瑞豪 王文昭 宇波[1] 孙东亮[1] DENG Ya-jun;BIAN Rui-hao;WANG Wen-zhao;YU Bo;SUN Dong-liang(School of Mechanical Engineering,Beijing Institute of Petrochemical Technology,Beijing 102617,China)

机构地区：[1]北京石油化工学院机械工程学院,北京102617

出　　处：《科学技术与工程》2021年第13期5179-5187,共9页Science Technology and Engineering

基　　金：国家自然科学基金中瑞国际合作与交流项目(51961135102)。

摘　　要：在太阳能光热发电系统中,采用水工质作为传热介质,吸热后产生高温高压蒸汽直接驱动汽轮机,可有效减少热量传递过程中的能量损失,因而具有很好的应用前景。水工质在蓄/放热过程中会发生相变,单一显热蓄热技术难以与水工质的温-焓曲线匹配,从而产生较大火用损。嵌入与水工质温焓曲线相匹配的显热-潜热多级蓄热系统是有效减少系统火用损失、提高蓄热能力的重要途径。首先,介绍了太阳能光热发电中常用的显热蓄热技术及其优缺点;其次,给出了适用于太阳能光热发电的潜热蓄热技术;再次,从实验研究、理论分析和数值模拟3个层面对显热-潜热多级蓄热技术的发展现状进行了重点介绍;最后,指出了太阳能直接蒸汽发电系统中多级蓄热技术的研究目标和方向。In the solar power generation,water is often used as the heat transfer medium to generate high-temperature and highpressure steam to drive the steam turbine,which can effectively reduce the energy loss in the heat transfer process.Since the water will occur to the phase change in the charging and dis-charging processes,a single thermal storage system(such as sensible thermal energy storage)is difficult to match with the water’s temperature enthalpy curve,resulting in large energy loss.Adopting the sensible-latent multi-stage thermal storage technology,which matches the phase change characteristics of the water,is an important way to effectively reduce the energy loss and improve the heat storage capacity.The state-of-the-art sensible-latent multi-stage thermal storage technology was reviewed.Firstly,sensible heat storage technologies commonly used in solar power generation were introduced,and their advantages and disadvantages were analyzed.Secondly,latent thermal storage technology and materials suitable for solar power generation were summarized.Subsequently,the development status of the sensible-latent multi-stage thermal storage technology was introduced from three aspects of experimental research,theoretical analysis,and numerical simulation.Finally,the research objectives and development direction of multi-stage thermal storage technology were pointed out.

关 键 词：太阳能直接蒸汽发电 温-焓曲线 多级蓄热 显热蓄热 潜热蓄热 

分 类 号：TK02[动力工程及工程热物理]