化学储热技术的研究现状及进展

化学储热技术通过可逆的化学反应来存储和释放热能，其储热密度远高于显热储存和相变热储存，不仅可以对热能进行长期储存几乎无热损失，而且可以实现冷热的复合储存，因而在余热/废热回收及太阳能的利用等方面都具有广阔的应用前景。本文将化学储热分为浓度差热储存、化学吸附热储存和化学反应热储存3类，并针对上述分类的特点及其应用，对化学储热技术进行了系统的归纳。其中主要概括了目前广为关注、有前景的储热材料，总结了化学储热技术当前的研究现状以及最新进展，并且回顾了将化学储热技术应用于储热研究的试验系统。同时，基于研究现状的分析，指出了此项技术需要进一步研究和解决的相关问题，以期为化学储热技术的发展和走向实际应用提供有价值的借鉴和参考。

Research situation and progress on chemical heat storage technology

Chemical heat storage technology stores and releases thermal energy through reversible chemical reactions. Its energy storage density is much higher than that of the sensible heat storage and phase change heat storage. It can achieve not only the long-term storage of thermal energy with almost no heat loss, but also the concurrent cold and heat storage. Therefore, chemical heat storage has a broad application prospect in the field of waste heat recovery, surplus heat, and solar energy utilization. In this paper, chemical heat storage was classified into three categories:concentration differentia heat storage, chemical adsorption heat storage, and chemical reaction heat storage. The chemical heat storage was systematically reviewed based on its classifications, characteristics and applications. The promising chemical heat storage materials were summarized. Moreover, the state of the art and the latest progress on the chemical heat storage technology were elaborated. In addition, the thermal energy storage systems and devices that employ chemical thermal storage technology were addressed. Based on the cognition and analysis of the current research status, the existing technical problems in the practical applications and future research directions were pointed out in the paper. It is expected that it could give a holistic insight into chemical heat storage technology. Meanwhile, it is believed that it could provide some valuable references for the developments and practical applications of the chemical heat storage technology.