| 摘要 |
PROBLEM TO BE SOLVED: To suppress increase in cost of a pump for supplying a liquid to a ground heat absorber, in a geothermal power generating system for generating steam sent to a turbine without drawing hot water from a geothermal region.SOLUTION: A geothermal power generating system 10 includes: a ground heat absorber 30 in which water goes down from the ground to a geothermal region, absorbs heat in the geothermal region and rises to the ground; a heat exchanger 24 in which the water which has passed through the ground heat absorber 30 is supplied to a primary side and a liquid whose boiling point is lower than that of water is supplied to a secondary side, and which vaporizes the liquid by moving heat from water to the liquid; and a steam turbine 44 which rotates by the steam generated by the heat exchanger 24. It includes a first circulation flow passage 20 in which the ground heat absorber 30, the primary side of the heat exchanger 24 and a pump 22 are provided in the flow passage, and in which the water is circulated by the pump 22. |
