Koyo Electric Co Ltd (Kobe City) announced that a "binary power plant" using surplus heat energy has been completed.
"Binary power generation" is a geothermal power generation technology. In conventional geothermal power generation, turbines are directly turned by using vapor from the underground. On the other hand, in binary power generation, a liquid whose boiling point is lower than that of water is heated and evaporated by using vapor, hot water, etc, and the vaporized liquid is used to turn turbines.
The binary power plant was built by Koyo Electric and Okuhida Takara Onsen Cooperative Union (Takayama City, Gifu Prefecture). It uses surplus heat from the source of Takara Onsen (hot spring).