Dominion's Chesterfield Power Station is the largest fossil-fueled power station in Virginia. Located about 15 miles south of Richmond on the James River in Chesterfield County, the station can generate more than 1,600 megawatts.
Fueled by coal, it is one of six Dominion coal-fired or oil fired stations. Chesterfield supplies about 12 percent of the electricity used by the four million people the utility serves.
Chesterfield Units 7 & 8 combined cycle units, located at the Chesterfield Power Station, represent the culmination of years of study in the search for innovative and efficient generating technologies to meet future energy needs.
The combined cycle technology is tailor-made for tomorrow's power producers for several reasons:
First, combined cycle units are small, efficient, relatively inexpensive and can be built in approximately one-third the time it takes to build a pulverized coal station. Second, they can be installed at existing station sites with minimal environmental impacts. And third, it's a technology that can be adopted in stages - a feature that helps keep capacity additions in line with demand growth.
The 197-megawatt Chesterfield 7 unit occupies the site of Chesterfield 1, which was retired in 1981 after 37 years of service. Chesterfield 8 is identical to Chesterfield 7, and occupies the former site of Chesterfield 2 which was retired after 33 years of service. Chesterfield 7 and 8 burn clean natural gas and distillate oil. But instead of venting the hot exhaust gases to the atmosphere, the units extract most of the heat to produce steam which turns another turbine - hence the name "combined cycle."
At some time in the future, coal gasifiers could be added to the units to create a clean, burnable gas from the coal, which could be fed into the unit to produce power.
Because of its moderate costs, its flexibility, efficiency and environmental advantages, the combined cycle technology offers tremendous potential for the future. And it fits in well with Dominion's strategy of building new generating facilities to meet capacity needs when building is the lowest-cost option available.
A new scrubber was commissioned for the 325-megawatt Unit 5 on June 30, 2011. It joins the scrubber on the 652-megawatt Unit 6 that was placed into operation in 2008.
The remaining two coal-fired units at the station, 100-megawatt Unit 3 and 166-megawatt Unit 4, are scheduled to be tied into the new scrubber by the end of 2011.
The station also has two other natural gas-fired units. (> Learn more.)
Net Generating Capacity: 1,640 megawatts
Generating Capacity by Unit:
Unit 3 - 100 megawatts
Unit 4 - 166 megawatts
Unit 5 - 325 megawatts
Unit 6 - 652 megawatts
Unit 7 - 197 megawatts
Unit 8 - 200 megawatts
Units 1 and 2 were retired in 1982 after 33 and 37 years of operation
Average Daily Coal Consumption: 8,400 tons
Unit 3 - December, 1952
Unit 4 - June, 1960
Unit 5 - August, 1964
Unit 6 - May, 1969
Unit 7 - June, 1990
Unit 8 - May, 1992
Station Employees: +/- 200
Boiler Manufacturer:Combustion Engineering, Inc.
Turbine Generator Manufacturer: General Electric Corp.
Engineer/Builder: Stone & Webster Engineering Corp.