Patent ID: 8769951

Claim:
A geothermal power-generation system comprising: a compressor that compresses air; an air supply pipe embedded in a ground to a predetermined depth from a surface of the ground; a heat exchange unit that is connected to a distal end of the air supply pipe and performs heat exchange between air and geothermal heat; an air discharge pipe that is connected to the heat exchange unit and embedded in the ground from the surface of the ground; a turbine that obtains a rotational force by heated compressed air heat exchanged by the heat exchange unit; and a generator that generates power by a rotational force inputted from the turbine, wherein the heat exchange unit includes a columnar main body and a plurality of partition walls for defining a plurality of fine pores within the columnar main body, wherein the heat exchange unit includes a first heat exchange unit that is connected to a lower end of the air supply pipe and a second heat exchange unit that is connected to a lower end of the air discharge pipe, and the lower end of the first heat exchange unit is connected to the lower end of the second heat exchange unit by a U-shaped connecting piping.