| 摘要 |
PROBLEM TO BE SOLVED: To provide a ground heat exchanger and a geothermal power generator capable of implementing heat exchange large in capacity and excellent in heat efficiency since steam is obtained from high-temperature, high-pressure hot water extracted from underground without adhesion of impurities to devices by the steam used, and avoiding adverse influence on the environment near the geothermal field.SOLUTION: A ground heat exchanger 1 comprises: a pressurized water filling pipe 11 to which treatment water pressurized by a high-pressure feedwater pump 17 is supplied; and a hot water outlet pipe 12 in which hot water generated by supplying heat from a geothermal field 10 to the treatment water flowing down to the geothermal field 10 in the pressurized water filling pipe 11 flows up in a state of containing no steam, and the hot water extracted from the hot water outlet pipe 12 is fed to a steam generator 21 and extracted as steam only in the steam generator 12. The pressurized water filling pipe 11 is disposed on an outer circumference of the hot water outlet pipe 12 and the hot water moves to the hot water outlet pipe 12 by way of introduction holes 15 provided in a lower portion of the pressurized water filling pipe 11. |
