Furling of the windturbine

[Wind Empowerment Technology WG]

I've just moved this over from the general discussion board (Jon):

Hi wind-enthusiastic-people,

I´m looking for a topic of my thesis for my bachelors degree in renewable energies.
Due to my onlineresearch in the area of windenergy I found the "A Wind Turbine Recipe Book" by Hugh Piggott and
I would like to contribute with my thesis to this project. I saw that there are already quite a lot of studies conducted.

My idea was to studie the furling of the windturbine.
It´s very important for the energy-yield that the windturbine uses all the available wind in
higher windspeeds. Of course just untill a certain barrier, so it doesn´t get damaged or destroyed.
So for a optimal energy-yield it is important to optimize the point when the windturbine starts to furl.
This investigation would help to get a better knowledge/understanding which parameters influence the furling, and with what degree they do it.
My idea was to investigate the following parameters:
tail-length, tail-weight, tail-angle, size of the board of the tail, windspeed,........ to be continued(-:

It´s still a very superficial idea but I already would like to share it with you to get some feedback.

I´m greatful for every comment, feedback or advice.

Thanks a lot and
windy regards
immanuel(-:

[Jon Sumanik-Leary]

Hi Immanuel,

Thanks for getting in touch with us. This is indeed an area that has not 
been well studied, so a valuable contribution could be made to the 
design with a well-targeted research project.

I know that Esteban van Dam is currently working on this for his Masters 
thesis and recently conducted his fieldwork with Kostas Latoufis at the 
NTUA field testing site in Athens. I have made them aware of this 
message and hope they will get back to you themselves and explain where 
they are up to and whether they have identified any gaps in their 
research that you could investigate or how else your project could 
logically follow on and build upon what they have done.

Its not so much about furling, but it would be worth reading through 
Nienke Hosman's thesis of wind tunnel testing of a 1.8m Piggot turbine 
as it is very good: 
http://windempowerment.org/performance-analysis-and-improvement-of-a-small-locally-produced-wind-turbine-for-developing-countries/

I've also done some similar measurements myself out in the field up with 
Hugh on Scoraig, but shamefully have not yet got any further than 
writing up the first of the seven machines we tested: 
http://windempowerment.org/power-curve-measurements-of-locally-manufactured-small-wind-turbines-2/

Hope this helps,
Jon

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