Alaskan association permits two 4-MW generators at Naknek Power Plant

The Alaska Department of Environmental Conservation is taking comment until June 20 on a draft air permit allowing the Naknek Electric Association to install two permanent 4-MW generators at its Naknek Power Plant, and to run two temporary generators until the permanent ones are in place. 

The Naknek Power Plant is an existing facility that generates electric power by burning diesel fuel. It has operated at its current location since 1976. The existing emission unit inventory consists of 12 diesel electric generators.

The air permit application requests include:

  • Authorize the installation of two 4,000-kW backup diesel-fired generators (EU ID 13 and 14), a temporary 1,500 kW mobile diesel-fired generator (EU ID 13a), and a temporary 2,000 kW mobile diesel-fired generator (EU ID 14a). The temporary mobile generators (EU IDs 13a and 14a) are necessary to meet upcoming power demands. When EU IDs 13 and 14 are available, they will replace the temporary mobile generators.
  • Restrict the combined fuel consumption from EU IDs 13 and 14 plus the equivalent diesel fuel gallons consumption from EU IDs 13a and 14a to less than 365,218 gal/yr. The restriction limits NOx emissions from EU IDs 13, 13a, 14, and 14a to less than 39.9 tpy. This enables the project to avoid review of the NOx emissions under PSD regulations.
  • Restrict the combined fuel consumption from EU IDs 13 and 14 plus the equivalent diesel fuel gallons consumption from EU IDs 13a and 14a to less than 365,218 gal/yr and the sulfur content of the fuel they burn to no more than 0.2% by weight. The restriction limits SO2 emissions from EU IDs 13, 13a, 14, and 14a to less than 5.2 tpy. This enables the project to avoid review of the SO2 emissions under PSD regulations.

The new units are:

  • EU ID 13 – Caterpillar C175-20, 2014 model, Diesel, 4,000 kW;
  • EU ID 13a – Caterpillar XQ1500-3512B, Diesel, 1,500 kW;
  • EU ID 14 – Caterpillar C175-20, 2014 model, Diesel, 4,000 kW; and
  • EU ID 14a – Caterpillar XQ2000-3516C, Diesel, 2,000 kW.
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.