Keene, NH had a conundrum: the rate of flow into their water treatment plant was too high, and needed to be slowed. As, it turns out, sticking a hydroelectric turbine into the flow will do just that. And thus, a unique new hydroelectric facility was born…
From the press release:
In May 11, 2007 Governor Lynch signed the NH Renewable Energy Act that requires 25 percent of the State’s electricity to come from renewable energy by 2025. This Act makes the development of small renewable energy sources more economically feasible. Keene has a proven history of environmental dedication, and this project is just one example of the City’s successes. Together with the assistance of the EPA, Rentricity Inc., MacFarland-Johnson, Hazen and Sawyer, FERC, NHDES and many more the City navigated the complex process to reach our finish line, and we now want to share that experience with others.
This project generates electricity by taking advantage of excess pressure inside pipes that is created when water flows from a higher to lower elevation. The City’s Water Treatment Facility (WTF) is a location where that pressure difference occurs. Water flows by gravity from Babbidge Reservoir to the WTF because the reservoir is at a higher elevation than the WTF. That difference in elevation means the untreated water enters the WTF at 80 pounds per square inch (psi); however, it must be reduced to 14 psi before it enters the treatment units. This pressure differential turns the turbine to generate electricity. This electricity is then used at the WTF or sold back to PSNH’s electric grid to generate revenue.
Don’t miss the Ribbon Cutting Ceremony and Tour, April 23!
The ribbon cutting ceremony at the Keene Water Treatment Facility will officially start at 9 A.M., April 23rd, 2011 though there will be coffee and refreshments provided from 8:30 A.M. until the first speaker. We will then have a few speakers and finish with the ribbon cutting. From 10 A.M. until noon there will be an open house for the public with buses running from the Robin Hood parking lot every 15 minutes.