The Tufts Cove Generating Station has three thermal generation units and two combustion turbines that burn natural gas to generate as much as 450 megawatts (MW) of electricity. Natural gas provides the advantage of being a cleaner form of fossil fuel generation than coal or oil. In fact, burning natural gas to generate electricity creates 30% less carbon dioxide in comparison to petroleum.
The Tufts Cove Waste Heat Recovery project adds a sixth generator to the plant that will produce up to an additional 50 megawatts of electricity, enough to power up to 35,000 homes.
The new equipment captures waste heat from the exhaust streams of the two combustion turbines and use it to power a new steam turbine and generator set, generating 25 megawatts of electricity without any additional fuel or emissions. A second 25 megawatts will be generated by burning gas added directly into the waste heat stream from the turbines to increase energy output.