chatelot16 wrote:30% drop in production since the 50s
It proves that the soil is not a naturally isolated means of heat storage: it transmits heat coming from the center of the earth ... if it behaved by insulating the area of earth used would have cooled faster than '' in 60 years
The heat from geothermal energy originates from the degradation of radioelements contained in the soil, and on the other hand - for the deepest layers - heat transfer from the moho (30-35km deep), heat also originating from the degradation of radio-elements.
Injecting water to cool the soil (we do not escape the laws of thermodynamics), the only way to curb the phenomenon, is either to re-inject hot water from an exogenous source, or to wait until the area returns to its original temperature (very very long) so you can dig even deeper ...
"Engineering is sometimes about knowing when to stop" Charles De Gaulle.