Mitsubishi Heavy Industries (MHI) has received an order from Virginia Electric and Power Co. (VEPCO) to supply three M501GAC gas turbines and one steam turbine, which will be installed at the company’s Warren County power plant near Front Royal, Virginia, U.S.A. The new gas turbine combined cycle (GTCC) power plants will have more than 1300 MW of generation capacity, the company said. The gas and steam turbines have been ordered through Mitsubishi Power Systems Americas Inc. (MPSA).
Current plans call for the plant to be operational in late 2014 or early 2015. Under a separate long-term service agreement, MPSA will provide turbine maintenance, repair and outage services as well as replacement parts supply for the GTCC power blocks.
With GTCCs, gas and steam turbines are used in combination to generate electricity in two stages, using high-temperature exhaust gas from the gas turbine to produce the steam to drive the steam turbine. This configuration enables GTCC power plants to achieve a higher thermal efficiency, which in turn reduces fuel consumption and lower emissions, according to MHI.