4.2 metre, 24V battery charging machine based on my Recipe book and constructed by a Tripalium workshop in France 2 years earlier. In this video Jay Hudnall of Tieole is conducting a service of the turbine with help from the owners. I filmed it.
http://www.tripalium.org/
http://www.tieole.com/
http://www.scoraigwind.com/axialplans…
Diameter D = 1.04 m
Number of blades B = 3
Design tip speed ratio ld = 3.5
Mass including 1 m tower pipe m = 4.85 kg
Starting wind speed Vstart = 2.6 m/s
Survival wind speed Vsurv = 30 m/s
Cut in wind speed (if started) Vcut in = 2 m/s
Rated wind speed Vrated = 8 m/s
Nominal voltage 12 V DC
Power at rated wind speed P = 6 W
In this manual the 3-bladed VIRYA-1.04, electricity generating windmill, is described. The generator of this windmill is made of a Shimano Nexus hub dynamo type DH-2R40 or another type with similar flange dimensions. It is expected that, together with the detailed drawings, the windmill can be manufactured in a simple workshop.
For more details see the web page of
Adriaan Kragten, B. Sc.
Kragten Design
Populierenlaan 51, 5492 SG Sint-Oedenrode, The Netherlands
Telephone: + 31 413 475770
http://www.bidnetwork.org/en/member/adriaankragten
and download the pdf file manual_virya-1.04_may_2013.pdf
thanks Adriaan!
My wind turbine buiding worshop was organised by and located at the Nordic Folkecenter for Renewable Energy, Kammersgaardsvej 16, Sdr. Ydby, DK-7760 Hurup Thy, Denmark
Here is a new video of the workshop I helped Tripalium to run in France. It’s in French language. Thanks to Jay Hudnall of Ti’eole for inviting me. Location is Lîle near Toulouse
Date: 20-24th May 2013
Organised by and located at the Nordic Folkecenter for Renewable Energy, Kammersgaardsvej 16, Sdr. Ydby, DK-7760 Hurup Thy, Denmark
Participants: 15 people
Project: 3 metre 48-V machine with ferrite magnets (3F design)
Date: 13-17 May 2013
Organised by Tripalium and Tieole
Participants: 18 new people, 7 from Tripalium and me, Hugh Piggott
Location: Lîle, Bordeneuve 31290 Vieillevigne (au bord du canal du midi)
Projects: 4.2 metre grid tied, and smaller 2 metre battery charging using 1.8 metre recipe frame.
date: 20-27 APRIL
Location: Scoraig
4 participants built a 2 metre ferrite turbine (2F) for 24-v battery charging. Also balanced and fitted some 3 metre blades to last year’s 3 metre ferrite turbine.
Photo sequence is a bit random sorry.
Thanks to Jon Leary for this long video of my rambling presentation to a group of Engineers Without Borders students at a conference hosted by Strathclyde University on 1st March this year.
Southwest Windpower the company that makes the most popular brands of small wind turbines in the USA has shut up shop abruptly although the products will continue to be made by other companies in future. Turbulent times for small wind worldwide, following the collapse of Proven in the UK in 2011.
It is rumoured that SMA are planning to discontinue their ‘Windyboy‘ range of inverters. SMA pioneered the use of solar inverters for small wind but there are plenty of other options available these day.
Small wind is feeling strong competition from the PV industry at present with the price of PV at rock bottom levels but how much lower can that price go? The Chinese solar PV industry that has put such pressure on the worldwide manufacture with very low prices, is now going bust. This is a good time to buy solar panels! But harder to find a grid-tied inverter manufacturer that will stay in business for long.
My opinion is that small wind turbines work best in off-grid situations, and that the recent fashion for mass producing them and installing them on poor sites for grid connection is not sustainable. New contracts for feed-in-tariffs cannot go on being available for much longer, and without them this size of turbine can never compete with multi-megawatt windfarm machines installed on windy hilltops or offshore even. But an off-grid turbine brings power where there is none, working with PV to keep the battery up and the generator down.
