Thermal energy storage (TES) is an advanced technology that can enhance energy systems by reducing environmental impact and increasing efficiency. Thermochemical TES is an emerging method which permits more compactness storage through greater energy storage densities. The design of thermochemical energy storage systems is complex and requires appropriate consideration of many factors. Generally, many criteria need to be evaluated by engineers in engineering design such as cost, environmental impact, safety, reliability, efficiency, size, and maintenance. These factors need to be considered in designing thermochemical TES systems. In this study, some important factors related to design concepts of thermochemical TES systems are considered and preliminary design conditions for them are investigated. Parametric studies are carried out for the thermochemical storage systems to investigate the effects of charging temperature on the efficiency and behavior of thermochemical storage systems. The results show that the charging and overall energy and exergy efficiencies for both closed and open loop systems decrease by increasing the charging temperature.