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Geothermal Power Generation

Since delivering geothermal turbines and generators to its customer for the first time in Japan, Toshiba Group has continued to improve the performance of facilities, thus contributing to reducing CO₂ emissions through the promotion of geothermal power generation.

A Power Generation System That Minimizes CO₂ Emissions during Power Generation and Provides a Stable Power Supply Unaffected by Weather Conditions

Geothermal power generation produces electricity by extracting hot water and steam heated by underground magma reservoirs and by rotating steam turbines using the energy of the extracted water and steam.

Geothermal power generation, which causes a very low level of CO₂ emissions, is attracting global attention as a renewable energy source that has low environmental impact. Unlike other renewable energy sources, such as solar power generation and wind power generation, geothermal power generation is capable of providing a stable power supply unaffected by weather conditions.

Toshiba Group was one of the first company groups that developed geothermal power generation facilities for commercial use. Since delivering turbines and generators designed for a geothermal power plant in 1966 for the first time in Japan, it has continued to provide these facilities to various countries around the world, including Japan, the United States, the Philippines, Iceland and Mexico. We currently provide geothermal facilities equivalent to about 30% of the total global geothermal power generation capacity.

Supporting the Promotion of Geothermal Power Generation by Improving the Performance and Reliability of Turbines

Geothermal power generation uses high-temperature water and steam extracted from underground sources. Therefore, it is of critical importance to develop technologies for improving resistance to corrosion caused by corrosive gases contained in the extracted hot water and steam and technologies for removing steam moisture that causes energy loss and corrosion of parts. Toshiba is working to develop a number of such technologies. For example, we are engaged in the development and commercialization of technologies for coating steam turbine parts with anti-corrosive materials in order to improve the corrosion resistance of these parts. We have also developed turbine blades that separate moisture from steam and a mechanism that removes separated moisture out of turbines.