Wartsila wins contract to supply gas engines to Montana-Dakota

Wärtsilä said Jan. 27 that it has been awarded the contract to supply a 19-MW Smart Power Generation power plant to Montana-Dakota Utilities (MDU) to be located at a site in Sidney, Montana.

The company noted that new generation capacity is needed to meet the growing electricity demand in Montana-Dakota’s service area. The power plant is scheduled to be fully operational during the fall of 2015.

“The power plant will help to meet the increasing peak load requirements of our customers, as well as supporting a reliable supply of electricity to the region around the Bakken oilfields in Eastern Montana and Western North Dakota,” said Alan Welte, MDU’s Director of Generation.

This project will add large internal combustion engine (ICE) based generation to MDU’s portfolio. The plant will be made up of two Wärtsilä 34SG engines running on natural gas.

“These units were included as part of our generation resource planning process and were selected due to size and cost,” said Jay Skabo, vice president of electric supply for MDU. “Other factors were the emissions profile, efficiency, anticipated maintenance profile and ease of construction.”

The Montana Department of Environmental Quality has set a Feb. 5 deadline for any party to request a hearing on its Jan. 6 final decision to grant an air permit revision to Montana-Dakota Utilities for new gas-fired capacity at the coal-fired Lewis and Clark Station at Sidney in Richland County, Montana.

“On November 7, 2014, the Department received an application to modify Montana Dakota’s air quality permit MAQP#0691-01 to construct, operate and maintain two 20V34SG Wärtsilä (or W20V34SG) natural gas RICE generator sets, an indirect fired fuel heater (gas line heater) and associated building heating, ventilating and air condition (HVAC) units for the purpose of generating electricity at the Lewis & Clark Station,” said a DEQ approval document.

Each of the engines will have a lean-burn four-stroke design, with a nominal gross output of approximately 9.3 MW. Under the revised permit, Montana-Dakota needs to limit gas consumption during normal operation of the two Wärtsilä natural gas RICE to a maximum of 530.8 MMscf per rolling 12-month period. Emissions from the RICE generator sets will be controlled with a selective catalytic reduction (SCR) system using urea as the reaction agent, and an oxidation catalyst capable of maintaining the required emission limits.

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.