Abstract: The solar thermal power generation technology has broad application prospects in relieving global resources shortage and improving environment，while large-scale high temperature thermal storage without heat loss is the key in the solar thermal power systems. Three kinds of energy storage methods，including sensible heat storage，phase change energy storage and thermochemical energy storage are compared in this paper. Due to high energy storage density and long term storage energy at ambient temperature without heat loss，thermochemical energy storage technology offers a potential method for high temperature thermal energy storage in solar the thermal power generation system. Besides，technical and economic analysis of the thermochemical energy storage method for solar thermal power technology application is presented，and the recent progress of several promising thermochemical energy storage systems and existing problems are described. According to the technical and economic problems existing in practical application，future research on thermochemical energy storage technology should be focused on design of energy storage reactor，cycle performance investigation in the energy storage and release process，selection of appropriate energy storage system and scale-up study of thermochemical energy storage system.

Key words: solar energy, thermal power generation, high temperature heat storage, thermochemical reaction, thermochemical energy storage, solar energy, thermal power generation, high temperature heat storage, thermochemical reaction, thermochemical energy storage

摘要： 太阳能热发电技术对缓解全球资源紧张和改善环境有广阔的应用前景，大规模高温无损储热是太阳能热发电系统的关键。本文通过对显热储能、潜热储能和热化学储能3种热能储存方式的比较，认为热化学储能方法由于储能密度高，且可长期在环境温度下无热损储存，因而为太阳能热发电中的高温热能储存提供了一种潜在的方法。并对热化学储能在太阳能热力发电的应用上进行了技术经济分析，综述了几种有前景的热化学储能体系的研究进展，总结了各种储能体系的现存问题。根据热化学储能方法在实用化过程中存在的技术经济问题，指出了热化学储能技术的未来研究方向是储能反应器的设计、能量储存/释放循环性能探究、储能体系的选择及热化学储能系统的中试放大研究等。

关键词: 太阳能, 热发电, 高温储热, 热化学反应, 热化学储能, 太阳能, 热发电, 高温储热, 热化学反应, 热化学储能