Nederlandse Organisatie Voor Toegepast-natuurwetenschappelijk Onderzoek Tno

Johannes Christiaan Van 't Spijker

Ruud Cuypers

Adriaan Jan De Jong

Hendrik Pieter Oversloot

Jacobus Eversdijk

Nicole Ellen Papen-Botterhuis

Christiaan Franciscus Leonardus Van Soest

Christian Johannes Finck

The invention describes a composite material for heat storage comprising a thermochemical material (TCM) encapsulated in a water vapour permeable polymeric material. The thermochemical material preferably comprises at least one salt, at least one salt hydrate or a mixture of these, wherein the salt is preferably capable of binding water in an exothermic reaction, such as calcium chloride. Encapsulation in a water vapour permeable polymeric material results in an improved stability, cyclability of the thermochemical material, a reduced regeneration temperature and reduced corrosion of the environment. The composite according to the invention is particularly suitable for energy storage, preferably in the field of building and construction, and more preferably in the seasonal storage of solar energy.

Composite material for heat storage, method for preparation and use

The present invention discloses a closed system for thermochemical storage comprising at least one water condenser and at least two thermochemical modules, wherein a first thermochemical module comprises a first thermochemical material and a second thermochemical module comprises a second thermochemical material, and wherein the at least one water condenser and the thermochemical modules are connected so that water vapor can be exchanged individually between any two selected from the list consisting of the at least one water condenser and the at least two thermochemical modules. A method for desorption in the system according to the invention is also described. In this method, the first thermochemical module is used as a condenser to dry the second thermochemical module.

System and method for thermochemical storage of energy

The invention describes a composite material for heat storage comprising a thermochemical material (TCM) encapsulated in a water vapor permeable polymeric material. The thermochemical material preferably comprises at least one salt, at least one salt hydrate or a mixture of these, wherein the salt is preferably capable of binding water in an exothermic reaction, such as calcium chloride. Encapsulation in a water vapor permeable polymeric material results in an improved stability, cyclability of the thermochemical material, a reduced regeneration temperature and reduced corrosion of the environment. The composite according to the invention is particularly suitable for energy storage, preferably in the field of building and construction, and more preferably in the seasonal storage of solar energy.

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's-Gravenhage, Netherlands

Johannes Christiaan Van 't Spijker