US 2009/0020264 A1 · METHOD OF HEAT ACCUMULATION AND HEAT ACCUMULATION SYSTEM

Abstract

A thermal storage method according to the present invention includes the steps of: (A) putting a first composition A, including an n-hydrate (where n is a hydration number) of an inorganic salt in solid phase and having a phase change temperature Tm of 100° C. or less, in a thermal storage material container; (B) heating the first composition A to a temperature T2 that is higher than the phase change temperature Tm and removing water contained in the first composition A from the thermal storage material container, thereby obtaining a second composition B in which an m-hydrate (where m is also a hydration number and m<n) of the inorganic salt in solid phase and an aqueous solution of the inorganic salt are both included; (C) stopping removing the water from the thermal storage material container on sensing that the second composition B has been obtained; (D) reserving the second composition B; and (E) mixing the second composition B with water, thereby recovering at least a part of the heat that is stored in the second composition B.

Claims14

Dependent claims

A thermal storage method comprising the steps of:

(A) putting a first composition, including an n-hydrate (where n is a hydration number) of an inorganic salt in solid phase that has a phase change temperature of 100° C. or less, in a thermal storage material container;
(B) heating the first composition to a temperature that is higher than the phase change temperature and removing water contained in the first composition from the thermal storage material container, thereby obtaining a second composition in which an m-hydrate (where m is also a hydration number and m<n) of the inorganic salt in solid phase and an aqueous solution of the inorganic salt are both included;
(C) stopping removing the water from the thermal storage material container on sensing that the second composition has been obtained;
(D) reserving the second composition;
and
(E) mixing the second composition with water, thereby recovering at least a part of the heat that is stored in the second composition.

3 more elements

A thermal storage system comprising:

a thermal storage material container that contains a thermal storage material as a first composition, including an n-hydrate (where n is a hydration number) of an inorganic salt in solid phase that has a phase change temperature of 100° C. or less;
a thermal storage material heating section for heating the thermal storage material to a temperature higher than the phase change temperature;
a water removal passage for removing water in gas phase from the thermal storage material container;
a sensor for sensing the amount of the water that has been removed from the thermal storage material container through the water removal passage;
a control section for stopping the removal of the water through the water removal passage based on a result of detection done by the detector on sensing that the thermal storage material is a second composition in which an m-hydrate (where m is also a hydration number and m<n) of the inorganic salt in solid phase and an aqueous solution of the inorganic salt are both included;
a water supply channel for supplying water into the thermal storage material container;
and
a heat recovery section for recovering at least a part of the heat that has been stored in the thermal storage material.

5 more elements

Dependencies are inferred from the claim text.

Method of heat accumulation and heat accumulation system

Life of this patent

Method of heat accumulation and heat accumulation system

Life of this patent

Abstract

Claims14