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Bigger Isn’t Always Better

Smaller power plant footprint opens 40 acres of public waterfront access; reduces emissions, increases service reliability

Posted on November 4, 2013

GE announced an agreement with Footprint Power to provide Salem Harbor Station in Massachusetts, U.S.A., with a combined-cycle 674 MW natural gas facility to replace the existing coal and oil-fired power facility.

Footprint Power said that the plant will address local reliability needs, reduce regional emissions and facilitate the introduction of the renewable resources Massachusetts requires to meet greenhouse gas emissions reduction goals, all while occupying just 8.1 hectares of the 26.3-hectare site and maximizing the land available for future, non-power uses.

For the US$200 million power equipment contract, GE will supply its FlexEfficiency 60 technology, which includes two GE 7F 5-series gas turbines, D-series steam turbines, a simplified H26 generator, and an advanced heat recovery steam generator (HRSG), all controlled by GE’s Mark Vle integrated control system (ICS). The plant will also use air-cooled condensers, completely eliminating the use of hundreds of millions of L/dy of water from Salem Harbor for once-through cooling.

GE said the plant will be among the most environmentally advanced in the U.S., meeting or exceeding the environmental performance of every other fossil fuel power-generating facility in New England. The plant will reduce regional carbon emissions by approximately 408 000/yr – the equivalent of taking 90 000 cars a year off New England roads.

The company said it projects a 10% reduction in NOx emissions, 8% in SO2 emissions, and 6% in mercury emissions; reductions resulting from retirement of the existing coal and oil facility are not counted in these totals.

The existing coal and oil-fired Salem Harbor Station will shut down at the end of May 2014, and GE’s equipment will ship in late 2014/early 2015. To reduce the impact on area residents, heavy equipment will be delivered by boat, rather than via streets in local neighborhoods. Commercial operation is planned for June 2016, the company said.