Heat storage material composition, and heat storage system for heating and cooling building

Abstract

A heat storage material composition includes a main agent composed of a calcium chloride hexahydrate, an ammonium bromide, and a potassium bromide, wherein a 5° C. range lower-limit temperature T5L is in a range of 15° C. or more to less than 20° C., and a 5° C. range latent heat of melting H5 is 140 J/g or more. Preferably, the heat storage material composition includes 79 to 90.9 mass % of the calcium chloride hexahydrate, 2.7 to 12.3 mass % of the ammonium bromide, and 1.8 to 14.4 mass % of the potassium bromide in 100 mass % of the main agent.

Dependencies are inferred from the claim text.