Material with phase shift

With a material with phase shift ( MCP ) it is possible to store energy in the form of heat. The phase shift (fusion for example) is endothermic. The recovery of heat takes place during the opposite phase shift (exothermic solidification ).

Applications

Storage of heat

A known MCP is the sodium trihydrate acetate having a melting point towards 58°C. This material was implemented in removable containeurs (by trucks) to store the evacuated heat of incinerators of household refuse. The restitution of energy is done then remotely on stations equipped, at a temperature of approximately 50°C.

Insulation

Another application of the MCP is the insulation of the buildings. The energy stored in the walls (Enthalpy of fusion) is not transmitted inside the building. In period of overheating, the MCP melts and heat is stored; when the cooled building, the MCP resolidifie and stored energy is restored. The MCP thus improves the thermal Inertia of the building.

The MCP used in insulation are imprisoned in bricks, inserted in the walls.

See too

a presentation of [[CSTB]] the

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