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Wind & Micro-hydro

Harris Micro Hydro Turbines (see wind below)

The Harris Micro Hydro system is an efficient, durable battery charging Pelton turbine. It is especially well suited to produce usable power from springs and creeks that are too small to sustain the same level of useful power from a conventional AC generating system. Water is collected upstream from the hydro and piped downstream to where the turbine is located. As a rule the greater the head, (the difference in elevation between the collection point and the turbine is called the head) the better.

Because DC power can be stored in batteries, these small systems operate 24 hours a day collecting energy, a little at a time, to be delivered "on demand" from the batteries as the need dictates. For conventional houses which utilize AC electricity an appropriate inverter is configured into the system to change the stored DC energy in the battery system into "AC House Current".

Turbine output is determined by four factors:

1. Head, or vertical drop from source to turbine nozzle: Head can be measured with a transit or level and a measuring stick of known length in successive steps, - or - a quick pipe can be assembled from numerous garden hoses and the pressure can be measured with the hoses full of water. This, too, can be done in successive steps. 0.43 PSI. = 1 foot of head: 2.3 feet = 1 PSI

2. Flow in gallons per minute passing through nozzle: A temporary dam can be built to measure flow. By timing the filling of a container of known volume the flow can be determined. Care should be taken to not dry up creeks, but to leave enough water to maintain natural environmental balances.

3. Diameter, length and condition of feeder pipe: Generally, single nozzle systems with under 2000 feet of feeder pipe require a 2" pipe. A two nozzle system needs a 3" pipe and 4 nozzle systems require a 4" pipe. This will keep pipe losses under 25%. Please inquire about specific pipe losses for your site.

4. Turbine efficiency: Alternator systems are between 30% and 60% efficient.

When you are ordering a Hydro-Turbine we need the following information:

  • Head (Drop in feet from intake to turbine)
  • Flow (In Gallons per minute or Pounds per square inch pressure)
  • Pipe Size (Diameter and pipe type; PVC etc.)
  • Pipe Length (Total run)
  • Battery Voltage
  • Wire Run Distance (From Alternator to Battery)