Applications of phase change materials in solar water heating systems: A review

The use of a phase change material for the storage of latent heat is an ideal approach for the storage of thermal energy due to the high thermal density of storage, the isothermal nature of the storage process, and the ease with which it may be controlled. In recent years, there has been a rise in the use of latent heat storage systems for the purpose of energy conservation, solar heating systems, and waste heat recovery systems. The use of solar water heaters in practical settings has become more widespread. After providing a summary of the information that has been disseminated on the theoretical uses of water heaters, this article begins by examining the research that has been conducted on the practical applications of solar water heaters. This article includes covers methods to improve the efficiency of these systems as well as research on solar water heaters that combine phase change material with solar water collectors. This paper concludes with several suggestions for further research on phase change material-based water heaters. The completion of this review in a fruitful manner leads to a greater comprehension of the research and development of phase change material-based water heaters as well as the many methods by which these heaters might be improved.