ISSN Online: 2377-424X
ISBN Print: 0-89116-559-2
International Heat Transfer Conference 8
THERMAL ENERGY STORAGE SOME VIEWS ON SOME PROBLEMS
Résumé
Thermal energy storage has become a widely investigated field within the last decade and some applications, known 100 years ago, experienced a re-invention. A great number of concepts were developed for the storage of both sensible heat and latent heat. Some confusion exists in literature on the classification of chemical reaction heat; this is discussed here and a suggestion is made. Some basic considerations are given on thermal capacity for heat storage. Thermochemical storage processes appear as be most promising. Considering volumetric storage density, sensible heat is comparable to heat of melting; around ambient temperature only salt hydrates are superior to water. Thermochemical heat storage and a special application in the so-called heat transformer is treated in particular. Warm water storage - although widely applied with every problem seemingly solved - still raises a basic question: how can these stores be properly rated? The exergetic efficiency appears as a proper way.