Molten salt heat medium, method of using molten salt heat medium, and solar heat utilization system

摘要

It is an object of the present invention to provide a molten salt heat medium having a high heat-resistant temperature and a wide usable temperature range, a method for using the molten salt heat medium, and a solar heat utilization system using the molten salt heat medium. The molten salt type heat medium contains 12 to 40 mole percent potassium carbonate, 20 to 40 mole percent sodium carbonate, and 25 to 55 mole percent lithium carbonate. Contains carbonate mixture. The method of using the molten salt type heat medium includes heating the molten salt type heat medium described above, supplying the molten salt type heat medium to the heat using part through a pipe line in fluid communication with the heating part, and Using the heat provided by the molten salt type heat medium in the heat use section.