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The nearby town of Bellefonte, PA features the Gamble Mill, an old mill originally used to grind grain into flour - 1800s hydropower. The mill dam, pond, millrace and tail race are still in place and functional. The mill building is now a restaurant, but the all the water-works are owned by the borough. The municipal manager wants to put the system back to work as a small hydroelectric system to help supply the borough's electricity. Does this idea make sense? How much power could this system produce? The height difference between the mill race and the tailrace is ten feet (3 meters), and the stream can supply, on average, 100 cubic feet of water per second (2.8 m^3 / sec). The planned turbine would be 60% efficient under those conditions. How many watts? (Dont round please)

 Apr 14, 2016
 #1
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As below:

 

power

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 Apr 14, 2016
 #2
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Thanks, I can't seem to figure out how to transfer the watts to kwh for 7 cents a day

1) At $0.07 per kWh, what is this energy worth per day

2) The system will cost $60,000 to install. How many years will it take to pay off the system from the savings?

 Apr 14, 2016

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