Motors as Generators for Micro-Hydro Power by Nigel Smith
Motors as Generators for Micro-Hydro Power Nigel Smith ebook
Publisher: Practical Action
All hydro-electric turbine generators, like electric motors, work on the principle of electrons moving through wire as a result of wires passing through magnetic fields (the electromagnetic effect). The power generator in the system is a Permanent Magnet Alternator (PMA) with a pelton wheel directly attached to the shaft. Utility Bills) which are Should they buy a backup generator capable of powering their entire needs? The first step in assessing a site for microhydro is to measure stream flow. Realistically, photovoltaic panels, wind and micro-hydro power will not heat or cool your home for a reasonable installation budget. Therefore, it may be more Under this scheme, a generator receives a certain payment (19.9 p/kWh for systems installed in 2010/11) for every unit of electricity generated from micro-hydro power, whether you use it yourself (and save on bills) or sell it to the grid (for another 3 p/kWh). Hydro-electric Larger (2 to 100 kW) micro hydro turbines can produce 60 Hz electricity directly through regulation using an electronic load governor, which maintains a constant load on the generator through dump loads when electricity is not needed. Motors or generators that run at very low rpm (revolutions per minute) are large and expensive - a 1000rpm motor is much bigger than a 1500rpm one. Water is sent through four jets which 23 Comments on “micro-hydro power bucket”. Micro-hydro is fundamentally a small scale version of a power conversion installation using water. It's all fancy now but when we started it was just a bunch of junk from the dump that we got spinning fast enough to make a 12v rewind motor from a tapedeck generate enough power to light a car bulb. Microhydro, is a dam-less backyard hydro power generator you can use to generate residential off grid or grid-connected micro hydro power by harnessing a low head water stream. I'm not sure how many people realize that an electric motor and an electric generator are the same thing, a device for turning electricity and rotary motion into one another: take an electric motor and make something else spin the shaft, and it becomes a generator. This renewable energy micro hydro plant uses an un-modified pump/motor as turbine/generator to produce 20KW. Less popular than wind and solar, mostly because sun and wind are more widely distributed than streams, micro-hydro has nonetheless had a presence in the alternative energy scene since the Seventies. Refrigeration, central air conditioning, heat pumps and other motor-driven devices require AC, but DC motors could work just as well. However, a rapidly increasing portion of energy consumption, particularly for residential but also for commercial and industrial customers, is made up of electronic devices (see How Small Devices are Having a Big Impact on U.S. You can buy a book about from ITDG books, they also have a book about using induction motors as generators for micro hydro power. Despite wanting to consider energy efficiency first, I was still curious whether the copious water on our farm would be a good fit for microhydro power.