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Micro-Hydro Power - A Clean Source of Energy You Take From WaterMicro-hydro power - for those fortunate to live near a river or stream - seems a bit like a gift from heaven. For one thing, unlike solar power or wind power, you aren't at the mercy of the weather for your power. As long as you have a constant flow of water and there is sufficient pressure, you will have a constant source of energy.But running water alone won't be enough. You also need pressure - the type made by water pouring on top of water. So you'll need running water, and it must be running downhill steep enough to produce pressure. You'll need to place a pipe that is 2-4 inches upstream. The water will be forced through the pipe running downhill where it will create pressure naturally. At the bottom of the hill, the water shoots out of the pipe into a turbine that will generate electricity.
Then the water returns to the stream, unchanged except for the loss of a little kinetic energy.
Micro-hydro Power Equipment: What You Will Need:
The PenstockThis can be made from any type of material. The most popular is PVC because it is the cheapest. But it can also be made from steel or plastic piping.You want your pipe to run as straight as possible. Any bends or turns will slow down the water and reduce the pressure of your system. At the top of the pipe, where the water comes in (the water intake), you'll need to place a strainer to keep debris from entering the penstock and plugging the nozzles supplying water to the turbine. Also, if you live in an area where temps get to 32 degrees Fahrenheit or below, your pipe should be either buried or insulated, to keep it from freezing. The Turbine-GeneratorThis generator is made to run with water. High-pressure jets of water turn a propeller, which is also known as a runner. This creates your micro-hydro power.The runner is attached to a shaft that runs through the generator (also known as an alternator) that spins a powerful magnetic rotor. The spinning magnet produces electricity which is stored in a battery bank.
The Regulator and Diversion LoadThe great thing about a constant current of water is it never stops. The big problem with a constant current of water is it never stops.This can be a problem when your battery is full. You don't want your batteries to become overcharged. That's where a regulator comes in. It makes sure that your batteries don't overcharge. When they're full, the regulator shunts the power over to a diversion load. This is something that will bleed off the excess Micro-hydro power. A space or water heater is a good way to use up the excess power your micro-hydro power system creates. Batteries and the InverterThe power that comes out of your generator will be a direct current of electricity. Because most of your appliances will run on alternating current, you will need an inverter.Store the power you collect from the water into the battery box in direct current (DC) form. Then when you need it,run it through the inverter to convert it. Want More Information?A great book that discusses all sorts of renewable energy in detail, including micro-hydro power is Rex A. Ewing's excellent book, Power with NatureLearn More About
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