面向太阳能热发电的CaO-CO2热化学储热技术研究进展

doi:10.12096/j.2096-4528.pgt.22089

摘要/Abstract

摘要：

太阳能热发电技术是缓解能源危机、改善生态环境的重要技术，其通过配备储热系统可解决太阳能不连续供给与连续的电能消耗之间的矛盾。CaO-CO₂热化学储热技术具有来源广泛、成本低廉及储热密度高等优势，具有广阔应用前景。对CaO-CO₂太阳能储热系统展开回顾与总结，介绍了其储热原理及与太阳能电站集成方案，分析了影响钙基材料储热的影响因素，阐述了提高钙基材料循环储热性能及机械性能的方法，以期为高性能钙基储热材料的设计与制备，及其在太阳能发电厂中的大规模应用开发提供参考与指导。

关键词: 太阳能热发电, 热化学储热技术, CaO-CO₂储热系统, 储热性能

Abstract:

Concentrated solar power technology is an important way to alleviate the energy crisis and improve the ecological environment. It can solve the contradiction between the discontinuous supply of solar energy and the continuous consumption of electric energy with a heat storage system. CaO-CO₂ thermochemical heat storage technology has the advantages of wide sources, low cost and high heat storage density, and has a broad application prospect. Based on the review and summary of CaO-CO₂ solar heat storage system, this paper introduced its thermal storage principle and integration scheme with concentrated solar power plant, analyzed the influencing factors of calcium-based material heat storage, and expounded the methods to improve the cyclic thermal storage performance and mechanical properties of calcium-based materials. This paper provides some beneficial reference and guidance for the design and preparation of high-performance calcium-based heat storage materials and their large-scale application and development in solar power plants.

Key words: solar thermal power generation, thermochemical heat storage technology, CaO-CO₂ heat storage system, heat storage performance

中图分类号:

TK 05

徐运飞, 吴水木, 李英杰. 面向太阳能热发电的CaO-CO₂热化学储热技术研究进展[J]. 发电技术, 2022, 43(5): 740-747.

Yunfei XU, Shuimu WU, Yingjie LI. Research Progress of CaO-CO₂ Thermochemical Heat Storage Technology for Concentrated Solar Power Plant[J]. Power Generation Technology, 2022, 43(5): 740-747.

图/表 5

图1 CaO-CO2太阳能储热概念图

Fig. 1 Schematic diagram of CaO-CO2 solar heat storage

图2 闭式CO2布雷顿循环CSP-CaL系统

Fig. 2 Closed CO2 Brayton cycle CSP-CaL system

图3 蒸汽朗肯循环和闭式CO2布雷顿循环复合CSP-CaL系统

Fig. 3 CSP-CaL system coupled with steam Rankine cycle and closed CO2 Brayton cycle

图4 挤出滚圆法制备CaO球粒

Fig. 4 Preparation of CaO pellets by extrusion spheronization

图5 石墨浇铸法制备CaO球粒湿法造粒

Fig. 5 Preparation of CaO pellets by graphite casting and wet granulation

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面向太阳能热发电的CaO-CO₂热化学储热技术研究进展

Research Progress of CaO-CO₂ Thermochemical Heat Storage Technology for Concentrated Solar Power Plant

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