Abstract
Roles of thermal energy storage in energy systems are described. Among four concepts of thermal energy storage, latent heat-thermal energy storage has a few advantages such as high energy density and heat storage of high quality at a constant temperature. Latent heat-thermal energy storage depends on storage materials. Comprehensively evaluated thermodynamic data as well as cost data are applied to screening the materials. It is shown from the screening that there is no suitable single component materials over a temperature range from 300°C to 440°C. Thermodynamic background to search for suitable multi-component materials in the temperature range is discussed. An example of applying thermal analyses to experimental evaluation is finally shown.
