Patent ID: 6073448
Filing Date: 2000-06-13
Classification: F03G,F24T,Y02E

Abstract:
A geothermal energy conversion system that extracts heat from a heat source below the Earth's surface by circulating a fluid through a closed system, the heat source having a temperature above the boiling point of the fluid, comprising:a geothermal well having a casing defining a space that extends from ground level to the heat source, the casing having an upper end,a heat exchanger in thermal communication with the heat source to boil the fluid within the heat exchanger, and a system of valves and at least one pump configured to regulate the flow of fluid into and through the heat exchanger; anda cap at the upper end of the casing to seal the casing and form geothermal vapor within the space to provide a heat pipe effect to insulate the thermal communication with the heat exchanger.