Bethlehem Energy Center

The Bethlehem Energy Center is a state-of-the-art, combined-cycle, power generating plant powered primarily by natural gas. Calpine acquired the facility in 2010 as part of its purchase of the Conectiv Energy assets.

Built in 2002-03, the plant consists of eight electric generators, six driven directly by combustion turbines and two driven by steam turbines. The plant can produce 1,130 megawatts of electricity. Steam for the steam turbines is generated in heat recovery steam generators unfired boilers that get their heat from hot gas exhaust leaving the gas turbines. The combustion turbines, which primarily burn natural gas, can also run on low-sulfur diesel fuel oil. When combined, these two power cycles (the gas turbine and the boiler/steam turbine) create a highly fuel-efficient plant, consuming significantly less fuel than needed by a traditional fossil-fired boiler/steam turbine generator plant.

In addition to being fuel efficient, the combined-cycle plant also has an attractive environmental footprint. Because the fuels are low in sulfur, the plant emits only trace amounts of sulfates. Using low NOx burners, water injection, selective catalytic reduction and premium fuels, NOx emissions are held to very low levels compared to other fossil-fired generation. Combustion turbines have extremely high combustion efficiency, so volatile organic emissions and carbon monoxide levels are almost non-detectable.


Bethlehem, PA

Commercial Operation Date:

January 2003

Calpine Net Interest Baseload (MW):

1047 megawatts

Calpine Net Interest With Peaking (MW):

1130 megawatts


Calpine 100%


Natural gas-fired/oil, combined-cycle


Six Siemens V84.2, two Alstrom ST

NERC Region: