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Sustainable Energy Opportunities: Best Practices for Alaska Tribes

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Sustainable Energy Opportunities: Best Practices for Alaska Tribes ( sustainable-energy-opportunities-best-practices-alaska-tribe )

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Wave Energy Separate from tidal energy, wave energy comes from capturing the movement of waves, caused by wind, across the surface of the ocean. The technology for capturing wave energy employs buoys that rise and fall with the waves and generate electricity from the movement. This technology has seen very little development in the United States. One 40 kW buoy has been installed in Hawaii for use by the Navy, but overall, wave energy is still in the early stages of design. Regions of Best Implementation Areas of best implementation are those with consistently high current speeds and adequate depth. The University of Alaska Anchorage (UAA) conducted a two year feasibility study, funded by the Alaska Energy Authority (AEA), of hydrokinetic turbines in 27 sites along the Yukon, Kuskokwim, Susitna, and Copper Rivers. Sites included Bethel, Lower Kalskag, Upper Kalskag, Aniak, Chuathbaluk, Napaimute, Galena, Koyukuk, Nulato, Kaltag, Grayling, Anvik, Holy Cross, Marshall, Pilot Station, St. Mary’s, Mountain Village, Whitestone, Tanacross, Gakona, Copper Center, Chitina, Teller, Stony River, Sleetmute, Red Devil, and Crooked Creek. The study found that nearly all of the sites have sufficient current velocity for hydrokinetic installation, with the best sites furthest upstream because current is more rapid in those locations. Pelamis wave energy buoy off of Hawaii Photo courtesy of theirEarth.com Hydrokinetic fast facts: Run-of-the-river diverted flow turbines Infrastruct Medium to large (primary energy ure Scale source for city of Gustavus) In Stream Hydrokinetic Small to medium (when research is complete) Tidal Flow and Wave Energy small to Large Viability Region dependent (needs enough fall over the course of the channel to create the necessary current speed) Not viable – more technological development needed (will be effective in approximately 10 to 15 years) Sustainable Energy Opportunities: Best Practices for Alaska Tribes Page 40

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