Thermal power generation
Natural gas-fired power generation is a method of generating electricity that utilizes energy produced by burning fossil fuels. We supply electricity by operating natural gas-fired power plants using natural gas, which has a lower environmental impact than oil or coal, as well as by-product gas and residual oil generated during the oil refining process at our Group Refinery. We also invest in natural gas-fired power plants in North America with the aim of acquiring new knowledge and creating business opportunities.
Initiatives in Japan
Ougishima Power Station (Ohgishima Power Co., Ltd.)
This is a large-scale, highly efficient natural gas-fired power plant that utilizes the site of our former crude oil storage facility. It is operated by Ohgishima Power Co., Ltd. Electricity is supplied by a gas turbine combined cycle *1, which has excellent energy-saving properties.
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1. Gas turbine combined cycle: In normal gas turbine power generation, hot exhaust gas that is no longer needed after generating electricity from the gas turbine is discharged into the atmosphere. In combined cycle power generation, in addition to generating electricity from the gas turbine, heat from the discharged hot exhaust gas is recovered to drive a steam turbine to generate electricity.
| Operating company name | Ohgishima Power Co., Ltd. |
|---|---|
| Investors | Tokyo Gas Co., Ltd. 75%, Idemitsu Kosan Co., Ltd. 25% |
| Location | Ogishima, Tsurumi Ward, Yokohama City, Kanagawa Prefecture |
| Power generation scale |
Unit 1: 407,000 kW (started operation: March 2010) Unit 2 407,000 kW (Start of operation: July 2010) Unit 3 407,000 kW (Start of operation: February 2016) |
Mizue Power Plant (TOA Oil Co., Ltd.)
Located on the premises of the Keihin Refinery TOA Oil Co., Ltd., Ltd., a subsidiary of our Refinery, the plant generates electricity using by-product gas and residual oil generated during the oil refining process at the refinery as raw materials. In optimal coordination with Refinery, the plant generates electricity efficiently through a highly energy-efficient cogeneration system *2, contributing to a stable supply of electricity. In addition, some of the electricity and steam generated is also used for oil refining at the Refinery.
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2. Cogeneration system: A system that collects, utilizes, and supplies heat obtained along with electricity generation, rather than disposing of it.
| Operating company name | TOA Oil Co., Ltd. |
|---|---|
| Location | Mizue-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture |
| start operation | June 2003 |
| Power generation scale | 276,000 kW |
Initiatives overseas
Investment in natural gas-fired power plants (USA)
Our company is participating in a natural gas-fired power plant business in the United States with the aim of acquiring knowledge about power plant operations and market transactions and contributing to our domestic business. The United States is an area that Japan is using as a reference for power market reform, and we are currently investing in two natural gas-fired power plants.
Cricket Valley Natural Gas Power Plant
| Business operator | Cricket Valley Energy Center |
|---|---|
| Location | Dutchess County, New York |
| start operation | April 2020 |
| Maximum power | Approximately 1.1 million kW |
South Field Energy Natural Gas-Fired Power Plant
| Business operator | south field energy |
|---|---|
| Location | Columbiana County, Ohio |
| start operation | October 2021 |
| Maximum power | About 1,182 MW |