Exelon Medway LLC - Oil-Fired Diesel Power Plant in Medway, Massachusetts

Exelon Medway LLC is an oil-fired diesel power plant located in Medway, Massachusetts, United States. With a capacity of 135 megawatts, it operates as a peaking plant, supplying electricity during periods of high demand. The facility is owned and operated by Exelon Power, a major energy company in the country. The plant uses oil as its primary fuel, a common choice for peaking units due to its ability to ramp up quickly. Diesel plants typically use internal combustion engines or combustion turbines. The facility operates under the regulatory framework of the U.S. Environmental Protection Agency (EPA), including the Clean Air Act (CAA) and associated standards for emissions of sulfur dioxide (SO2), nitrogen oxides (NOx), and particulate matter. As a peaking plant, Exelon Medway LLC plays a crucial role in maintaining grid reliability in the region, particularly during extreme weather events or when baseload plants are offline. Its location in Massachusetts places it within a densely populated area, requiring adherence to stringent environmental regulations to minimize local air quality impacts.

The plant's oil-fired operation results in higher CO2, SOx, and NOx emissions per MWh compared to natural gas or renewable sources. Its location in a populated area of Massachusetts necessitates compliance with EPA's National Ambient Air Quality Standards (NAAQS) and regional haze rules.