TransCanada replaces gas turbine at Alberta power plant

TransCanada Energy Ltd. applied on Dec. 11 at the Alberta Utilities Commission to amend a prior Bear Creek Power Plant approval to reflect the replacement of a Rolls Royce Trent 60 Dry Low Emissions (DLE) gas turbine with a Rolls-Royce Trent 60 Wet Low Emissions (WLE) gas turbine.

This power plant, built in 2001, is an industrial cogeneration facility situated on Weyerhaeuser’s Grande Prairie Pulp and Sawmill Complex, approximately 10 kilometers south of Grande Prairie, Alberta. The plant consists of one gas-fired turbine, one heat recovery steam generator and one steam condensing turbine generator. The turbine exhaust passes through a heat recovery steam generator to produce high-pressure and low-pressure superheated steam. This steam combines with steam from Weyerhaeuser’s wood waste-fired boiler to power a 32-MW condensing steam turbine generator.

“In 2014, TCE replaced the Rolls-Royce Trent 60 DLE gas turbine with a Rolls-Royce Trent 60 WLE turbine because the DLE model was no longer supported by the manufacturer, Rolls-Royce,” said the application. “The WLE turbine is installed in the same enclosure that housed the DLE turbine, located within the fenced industrial complex. No structural changes were made to the enclosure or the building and no significant environmental effects resulted from the turbine replacement.”

Due to this project, the total net generation to the grid in megavolt-ampere (MVA) for the power plant increased from 107.406 MVA to 118.209 MVA. This is attributed to the higher MVA rating of the WLE turbine. The DLE turbine was rated at 61.471 MVA while the WLE turbine is rated at 75.274 MVA. The MVA for the steam turbine remained 42.935 MVA.

About Barry Cassell 20414 Articles
Barry Cassell is Chief Analyst for GenerationHub covering coal and emission controls issues, projects and policy. He has covered the coal and power generation industry for more than 24 years, beginning in November 2011 at GenerationHub and prior to that as editor of SNL Energy’s Coal Report. He was formerly with Coal Outlook for 15 years as the publication’s editor and contributing writer, and prior to that he was editor of Coal & Synfuels Technology and associate editor of The Energy Report. He has a bachelor’s degree from Central Michigan University.