This presentation by Mick Sagrillo is from 2009. It’s a good summary of what is wrong with rooftop wind and is backed up by actual production data. If you are enthusiastic about rooftop windpower then you ought to look at this presentation and then decide whether its such a great idea.
John Whitfield is offering short, commonsense workshops on microgeneration at Culgower in Sutherland.
Check out his web page for more.
„Drei Flügel im Wind –
Eine Selbstbauanleitung für Kleinwindturbinen“
Herausgeber: GREEN STEP e.V. , Wolfratshausen
Gewinn fließt in erneuerbare Energie Entwicklungsprojekte in Kamerun
Sie wollten schon immer mal eine Windturbine bauen? Ihr Zögling plagt Sie mit Fragen, wie das mit der Windkraft denn so genau geht? Die können Sie im nun ganz einfach beantworten – mit der Selbstbauanleitung für Kleinwindturbinen „Drei Flügel im Wind“ von GREEN STEP e.V. Mit dieser Anleitung können Sie mit einfachsten Materialien aus dem Baumarkt eine einfache funktionierende Windkraftanlage zur Stromversorgung bauen. Und wer weiß, vielleicht wird Ihr Zögling ja damit dann so berühmt wie William Kwamkamba – „Der Junge der den Wind einfing“ – er baute in Afrika eine Windturbine um das Haus seiner Eltern mit Strom zu versorgen.
Der Gewinn aus dem Verkauf des vorliegenden Werkes kommt den Projekten in Kamerun zu Gute. Das nächste große Projekt des Vereins in Kamerun ist der Bau einer erneuerbaren Energieschule in der junge Menschen im Bau von Kleinstwind- und Wasserkraftanlagen, verbesserten Kochern, Solartrocknern und Regenwasserzisternen und vielem mehr ausgebildet werden.
Bestellen Sie jetzt Ihr eigenes Exemplar für € 20,00
(+ € 2,00 Verpackung und Versand)
Senden Sie eine E-Mail mit Ihrer Anschrift und der gewünschten Stückzahl an:
Der Versand erfolgt innerhalb von 3 Werktagen.
Vivek Mundkur has made a video on the windmills he has been making for the last two years.
This is the tower after a 3 metre diameter (ten foot) turbine jumped off in reported 120 km/h winds in Palestine recently. The 1.5 inch inner pipe of the yaw bearing has clearly bent. COMET-ME will be using a larger pipe size for their yaw bearings in future. However this was the standard size that I specify in my Recipe Book.
Windspeed 120 km/h is only 33 m/s, which is not exceptional for us on Scoraig, but there could be other factors at work including turbulence. A high gyroscopic moment induced by a rapidly yawing rotor could be one. Anyway this is where this turbine failed and failures are useful lessons. That’s why I am sharing it on this blog.
Esteban van Dam has run a small wind workshop in Buenes Aires, Argentina.
also http://www.youtube.com/watch?v=Gle_wZYuuSw
and http://www.youtube.com/watch?v=A3js0Xy62qM
And a few pics:
http://picasaweb.google.com/118023745814527581382/AerogeneradorEolocal#
http://picasaweb.google.com/118023745814527581382/AerogeneradorTerminado#
For many centuries in Central Asia, a traditional home heating method known as a ‘Sandali’ or ‘Korsi’ has provided families with a warm place to retreat into when the temperatures dropped below freezing. The homes and buildings in this region have limited insulation built within their construction and interior room temperatures can often approach the freezing conditions of the outside during prolonged spells of bad weather.
Read more about using the dump load for effective heating at etc4CA
by Anthony Karomba & Roland Valckenborg
“After giving the master class on Hugh Piggott wind turbines in Tanzania, it was recognized by the participants that not everybody is familiar with the English language. During the master class this was not a very big problem, because participants could help eachother translating English into Kiswahili, which is the national language of Tanzania. However, after the training all participants went back to their homes in very different parts of Tanzania. Although mobile phones are increasingly covering the country, it appears to be difficult for a lot of Tanzanian workshop artisans – also called ‘fundi’ – to help eachother on translating. Therefore it was decided to make an extra manual in the Kiswahili language. ”
More here
Dan Bartmann in action at Otherpower building and testing a new design alternator for a 12 footer (3.6 metre diameter turbine). See his full description on the otherpower discussion board of this machine with 15 inch magnet rotors, and thick 2 inch diameter magnets. He squeezes a bit more copper in there, and can get 1000 watt continuous without overheating while testing on the ground. Nice work.
