LONG TERM HEAT STORAGE DEVICE AND METHOD FOR LONG TERM HEAT STORAGE OF SOLAR ENERGY AND OTHER TYPES OF ENERGY WITH CHANGING AVAILABILITY

摘要

The invention relates to a long term heat storage device for long term storage of solar energy and other types of energy in the heat storage material of which a rock bulk material (1) in particular of volcanic origin such as diabase basalt granite and gneiss is used. The rock bulk material preferably forms a polydisperse bulk material in particular as the void volume of the rock bulk material (granulate) having a first particle size or particle size distribution takes up a granulate having a second particle size or particle size distribution. The rock bulk material (1) can be enclosed preferably all around or predominantly by a bulk powder fill (5 16) in particular an ash fill in particular with a shell of shaped rocks (2 6 17) interposed. The rock bulk material (1) can be enclosed all around or predominantly at least laterally by a shell of shaped rocks (2 6 17) which is in particular cylindrical in particular by a masonry wall (2).