| Abstract |
Hot-Dry-Rock (HDR) for long time has been a synonym for heat, extracted from deep hot crystalline rock (> 5000 m). 25 years ago. During the first oil crisis this idea was presented for the first time by atomic physicists and technicians from the Los Alamos Scientific Laboratory (New Mexico) at energy discussions. The aim of this concept was to use the inexhaustible and at any place available energy for electricity production by so-called "Man-Made-Geothermal- Systems (MAGES)". This concept rarely agrees with present day systems for the use of geothermal energy and had been termed as |