Tokyo Gas-affiliated power plants are operated by Tokyo Gas Baypower Co., Ltd. (100,000 kWh, wholly owned by Tokyo Gas, 50% maximum efficiency on a lower calorific value, or lower heating value (LHV), basis at the generating end), Tokyo Gas Yokosuka Power Co., Ltd. (240,000 kW, 75% owned by Tokyo Gas, 51% maximum efficiency), Kawasaki Natural Gas Power Generation Co., Ltd. (840,000 kW, 49% owned by Tokyo Gas, 58% maximum efficiency), and Ohgishima Power Co., Ltd. (approximately 1.22 MW, 75% owned by Tokyo Gas, 58% maximum efficiency).
In addition, we decided to receive the entire output, approximately 1.2 MW, of the Moka Power Station, which Kobelco Power Moka Inc., a wholly owned subsidiary of Kobe Steel, Ltd., is building in Moka City, Tochigi Prefecture. The plant’s first unit will be completed in the second half of 2019 and its second in the first half of 2020.
These plants are all highly energy-efficient natural gas-fueled power plants that generate electricity using cutting-edge gas turbine combined cycle technology.
Generating electricity at these newly built highly efficient power plants in place of existing thermal power plants will help reduce our CO2 emissions.
Ohgishima Power Station
Gas Turbine Combined Cycle Technology
Combined cycle power plants that use liquefied natural gas (LNG) as fuel achieve higher power generation efficiency as they draw upon the heat from gas turbines to convert water to steam, which is then collected to run power-generating turbines.
■The process of combined cycle power generation
The Tokyo Gas Group has been seeking to acquire renewable energy sources focused on land-based wind power. In fiscal 2017, we began expanding our efforts to include solar power and offshore wind power generation. We intend to accelerate our participation in joint ventures with business partners in projects not only in Japan but also in other countries and regions. Our immediate goal is to acquire renewable energy sources capable of generating electricity at the scale of 1 million kW (400,000 kW in Japan and 600,000 kW overseas).
Wind Power Generation
We built our first wind power plant at our Sodegaura LNG Terminal with an output of 1,990 kW in October 2005. Our second venture into the wind power business began with the announcement in April 2011 of our investment in Shonai Wind-Power Generation Co., Ltd. Shonai now operates two wind power plants in Yamagata Prefecture, including the Yuza Wind Power Plant, in operation since December 2010, with a combined power generating capacity of 16,360 kW.
Yuza wind power plant
Solar Power GenerationWe also promote capital and business tie-ups and collaborations with other companies on projects related to solar power generation to conduct operations leveraging our integrated expertise and expand the use of renewable energy. We will continue to engage in joint development and operations to acquire more sources of solar power by incorporating the expertise of our partners.
Kumagaya solar power plant in Saitama Prefecture
As part of our efforts to create a decarbonized society, we will continue to explore the possibilities of acquiring electricity generated by various renewable energy sources, such as wind power, biomass with its high facility utilization factor, and solar power featuring high potential capacity.