Recent contributions to thermochemical heat storage (TCHS) technology have been reviewed and have revealed that there are four main branches whose mastery could significantly contribute to the field. These are the control of the processes to store or release heat, a perfect understanding and designing of the materials used for each storage process, the good sizing of the reactor, and the mastery of the whole system connected to design an efficient system. The above-mentioned fields constitute a very complex area of investigation, and most of the works focus on one of the branches to deepen their research. For this purpose, significant contributions have been and continue to be made. However, the technology is still not mature, and, up to now, no definitive, efficient, autonomous, practical, and commercial TCHS device is available. This paper highlights several issues that impede the maturity of the technology. These are the limited number of research works dedicated to the topic, the simulation results that are too illusory and impossible to implement in real prototypes, the incomplete analysis of the proposed works (simulation works without experimentation or experimentations without prior simulation study), and the endless problem of heat and mass transfer limitation. This paper provides insights and recommendations to better analyze and solve the problems that still challenge the technology.

中文翻译：

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热化学蓄热工艺及应用的现状与展望

最近对热化学蓄热 (TCHS) 技术的贡献进行了审查，并表明有四个主要分支的掌握可以对该领域做出重大贡献。这些是对储存或释放热量的过程的控制，对用于每个储存过程的材料的完美理解和设计，反应器的良好尺寸，以及对整个系统的掌握以设计一个有效的系统。上述领域构成了一个非常复杂的研究领域，大部分工作都围绕其中一个分支进行深入研究。为此目的，已经并将继续作出重大贡献。但该技术尚不成熟，目前还没有确定的、高效的、自主的、实用的、商用的TCHS设备。本文重点介绍了阻碍该技术成熟的几个问题。这些是致力于该主题的研究工作数量有限，模拟结果过于虚幻，无法在真实原型中实现，对拟议工作的分析不完整（没有实验的模拟工作或没有事先模拟研究的实验），以及无休止的传热和传质限制问题。本文提供了见解和建议，以更好地分析和解决仍然挑战该技术的问题。对拟议工作的不完整分析（没有实验的模拟工作或没有事先模拟研究的实验），以及无休止的传热和传质限制问题。本文提供了见解和建议，以更好地分析和解决仍然挑战该技术的问题。对拟议工作的不完整分析（没有实验的模拟工作或没有事先模拟研究的实验），以及无休止的传热和传质限制问题。本文提供了见解和建议，以更好地分析和解决仍然挑战该技术的问题。