Dry steam plants
Steam power generation is a method of electricity generation by turning the turbine directly with high-temperature (over 200-300°C) natural steam available in the geothermal reservoir. There are 2 types of dry steam power plants: the steam dominant type where only steam is injected from the reservoir layer and a hot water dominant type where hot water and steam are mixed and injected.
Although the steam dominated type is the simplest power generation method, but the only example of this type of power plant in Japan is the Matsukawa Power Station, also known as the first geothermal power plant in Japan
Matsukawa Geothermal Power Station
The first geothermal power station in our country. Capacity changed from 22,000 kW to 23,500 kW in June 1993.
Matsuo village, Iwate Prefecture
Tohoku Hydroelectric Geothermal Corporation
Started operation on October 8, 1972
Dry steam system
At the Matsukawa Power Station, electric is generated by turning the turbine with natural dry steam from geothermal steam wells. This is called the dry steam method.
関連ページ
- Single Flash plants
- 地下で減圧沸騰(フラッシュ)した地熱流体から蒸気を1回だけ分離しタービンを回す方法。日本の地熱発電所のほとんどがこの方式
- Double flash plants
- 地下水がマグマの熱で加熱されて高温・高圧になった蒸気や熱水を取り出し発電するのが地熱発電
- Binary plants
- 150℃以下の温泉水を使って発電を可能にする発電方法。地熱発電の可能性を拡げる技術として注目を集めている