Alaska Electric permits small power plant in Juneau

The Alaska Department of Environmental Conservation is out for comment until May 11 on a draft Minor Source Air Quality Control Permit that would allow Alaska Electric Light and Power Co. (AEL&P) to build an Industrial Power Plant (IPP).

The IPP will be a new stationary source located on Barrett Avenue in Juneau, Alaska. It is to be called the Mendenhall Valley Standby Generation Station. It consists of a single General Electric (GE) LM2500 combustion turbine generator package capable of operating on either diesel or natural gas as fuel. The turbine will be equipped with water injection to control NOx emissions.

The plant will also consist of a single compression ignition reciprocating internal combustion engine (CI RICE) to provide black start capability to the plant in the event of a total system blackout. Auxiliaries for the plant will include fuel tanks, fuel forwarding equipment, water treatment skid, water injection skid, transformer, disconnect switch, and small warehouse.

The department received a minor permit application from AEL&P on Dec. 24, 2014, covering installation of a single 255 million British thermal units per hour (MMBtu/hr) turbine and one 1,066 horsepower (hp) diesel-fired black start generator. To avoid Prevention of Significant Deterioration (PSD) major source classification, AEL&P proposed to limit carbon monoxide (CO) emissions by restricting the amount of time the turbine can operate at loads less than 30%. Additionally, NOx emissions will be controlled below PSD thresholds with a water injection system.

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.