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108: All About Hydro Power Generators

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Learn more about power generation, micro hydro and water heater element. Get fiction entertainment and amazing survival facts with Sara F. Hathaway’s podcast.

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108: All About Hydro Power Generators

  1. 1. By: Ken Jensen
  2. 2.  Micro-hydro is one of the most efficient forms of electrical power generation.  Lowest Cost per Watt of any other power generation.  It is fairly easy to predict what your output would be year round, which can result in smaller battery sizes. theprepperpodcast.com/microhydropower
  3. 3. Water is used and directed into blades called a turbine. The turbine spins and is connected to a shaft which spins a motor, sometimes direct coupled and sometimes using belts for converting low speed high torque inputs to high speed low torque outputs to the motor. theprepperpodcast.com/microhydropower
  4. 4. The generator, if bought is usually a DC alternator generator. This is just an AC generator with a one way switch on each phase. If built, the generator is usually AC, but then sent to a rectifier to convert it to DC. The DC is then usable by an inverter/charger which decides to either convert the DC to AC to be used, or to dump it to a battery bank for storage. This same device can convert the stored capacity to AC to be used when generation is down. theprepperpodcast.com/microhydropower
  5. 5. There are other ways to use a basic charge controller and consumer grade inverter as well. It would be a little cheaper if you knew what to look for, but it can be a little more complex.
  6. 6. Probably the best build would not be what you would call “easy.” One of the best builds would be a large waterwheel with a gear-ratio change driven by belts or handmade gears. The awesome thing about waterwheels is that you can couple them up to an alternator or even a mill for grinding grain. theprepperpodcast.com/microhydropower
  7. 7. The very first thing I would do it to make my home more efficient first.  Water flow  spring, river, waterfall  Is it year round or seasonal  How far am I from the source? theprepperpodcast.com/microhydropower
  8. 8.  For High flow applications I may go with a permanent magnet alternator  For low flow applications I may go with a basic automobile alternator, requires less break over force Impulse  Typically for micro-hydro because it is easier to work on  Can deal with sand and debris better theprepperpodcast.com/microhydropower
  9. 9. Pelton  Designed for efficiency (165 degree angle into buckets, any more will have deflected water interference)  It is usually for higher head applications “above 20m” for micro-applications theprepperpodcast.com/microhydropower
  10. 10. Turgo  These turbines are much more difficult to make  Run much faster, which allows direct coupling (efficiency)  Works in a wide range of speeds theprepperpodcast.com/microhydropower
  11. 11. Gatta  This is a good one for hand building and is very easy to maintain.  Has a low power output  A waterwheel with a vertical axis that came out of Napal. theprepperpodcast.com/microhydropower
  12. 12. Cross flow  Squirrel Cage design, like a hamster wheel with blades  Resembles the waterwheel with curved blades theprepperpodcast.com/microhydropower
  13. 13. Centrifugal Pumps (reverse pump turbines)  Run water backward through them and they can be found anywhere.  They have poor part-flow efficiency, and poor performance  Others would be the Francis Turbine, Propeller Turbine theprepperpodcast.com/microhydropower
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