| 摘要 |
A heat storage element which may be heated by solar radiation, comprises a body (1) of fibrous carrier material impregnated with a first substance, which, when heated, produces a gaseous medium and leaves a second substance, or with the second substance, said body being readily permeable to the corresponding medium in the gaseous phase. Heat so stored is recovered by allowing said medium to recombine with said second substance to reconstitute said first substance, with the evolution of heat. In the preferred embodiment, the first substance is a salt hydrate, such as a hydrate of calcium chloride, and said medium is water vapour. The fibrous carrier material (1) may be in the form of sheets of paper or cardboard stacked in spaced relationship to allow heated air to be passed therethrough for charging the heat storage elements, by removal of moisture, or to allow moist air to be passed therethrough, to supply moisture to the salt hydrate, with the evolution of heat, to recover the heat stored. <IMAGE> |
