Dresser-Rand, part of Siemens Power and Gas Division, recently delivered power generation equipment for a combined cycle power plant (CCPP) for the Shell Appomattox deepwater oil and gas floating production platform. The platform will be located 80mi off the coast of Louisiana in the Gulf of Mexico and is slated to start production around the end of this decade. The ~150MW CCPP will feature four 27MW gas turbine-driven generator sets equipped with heat recovery systems and a 40MW steam turbine generator.
The gas turbine gen-sets are self-contained mini-modules complete with all electrical wiring, piping, tubing and controls. The gen-set, ancillary equipment and baseplate remain connected after unit testing, substantially reducing the time required to install, commission and start-up the packages.
With CCPPs, a gas turbine generator produces electricity while the waste heat from the gas turbine is used to make steam to generate additional electricity via a steam turbine. The CCPP for the Shell Appomattox platform will improve overall fuel efficiency, reduce emissions of greenhouse gases, and increase total power generation for the platform.
The packages feature a compact design and reduced weight to accommodate the platform’s footprint constraints. The design allows for easy accessibility to the package components for maintenance and service, along with adequate workspace.
The steam turbine generator package was manufactured in Wellsville, NY and packaged in Olean, NY. An 18.5MW load test was performed on the steam turbine generator set using the steam-producing capability at the Olean facility. The gas turbine generator packages were designed in Kongsberg, Norway.