Combined-cycle Power Plants

Combined-cycle technology uses both a gas turbine and a steam turbine to generate electricity burning natural gas, a fuel with a lower environmental impact than other fossil fuels. The exhaust heat from the gas turbine is used to generate steam, generating electricity twice and minimizing waste.

• High thermal efficiency
  Steam turbine operating alone 43% Gas turbine operating alone 40%
  →Combined cycle 60% or higher
  ※A2% improvement in generating efficiency equates to an annual reduction of about 35,000 tons of CO₂.
• Environmentally friendly
  Low carbon dioxide (CO₂) emissions released into the air
  Low nitrogen oxide (NOX) and sulfur oxide (SO₂) emissions released into the air
  Low volume of hot wastewater released into the ocean
• Lower fuel costs, reflecting lower resource use