Wind study

[Toblerone]

Hello,
I would like to have your advice on the choice of an anemometer / wind vane. I would like to install one on my property for about 12 months to check the feasibility of installing a wind turbine.
Is this type of device enough to measure the credibility of a place?
Goods.

[Christophe]

Yes that's what the professionals do ... and nothing that it seems to me requires administrative procedures (if the measurement mast is more than 12m) ...

But not to lose 1 year and save a few hundred euros, you can also try to find the compass rose of the location (the closest) to your future wind turbine, it is available on the internet for free ... the more this is averaged over several years ... So a priori more reliable than a measurement over 1 year ...

ps: happy new year to all ...

[Christophe]

Here is an example of the wind rose for Brest at 10 and 80m which is interesting for the small wind turbine, but this site only gives the last 2 weeks for free (therefore not very significant to install a wind turbine, otherwise it is 120 € : https://www.meteoblue.com/fr/historyplus#try-for-free for 30 years of weather data for 1 location, it is not cheap but it is certainly much cheaper than a measurement mast!)

https://www.meteoblue.com/fr/meteo/arch ... R_PER_HOUR

By looking better, you should be able to find a history of 2 or 3 years for free ...

[Christophe]

A wind rose over 20 years for 40 € HT at Meteofrance: http://services.meteofrance.com/e-bouti ... etail.html

By cons it is limited to real weather stations, not necessarily very close to home ...

[Toblerone]

Thank you for that answer.
However, the area to be studied is located in the Drôme in mid-mountain and relatively isolated, I don't think there is a station which is close enough to be representative of this area. The latter seems to be located in a "corridor" of wind.
I would have liked to take a measurement over about 1 or 2 years to find out if it is worth the cost of embarking on a homemade wind turbine project.

[Christophe]

If you don't have a nearby station, I think you can find wind roses calculated on the weather models ...

I have been paragliding since 2012 and I can tell you that these models are quite reliable (each paragliding site does not have its own weather beacon ... and those who have very close to it are even extremely rare) ...

Their consultation is free, their history I do not know ...

After if it is for a homemade wind turbine, in your place I will trust my feeling too: it blows or not?

What power are you targeting? What mast height?

[Toblerone]

Yes, it blows. I simply wanted to collect information to possibly size the wind turbine.
I currently have no power optics and even less mast height.
Where can I consult these compass roses used for paragliding?

[Christophe]

In paragliding it is not wind roses that we use but the info of weather models ...

I guess wind roses are available from these models: the meteoblue site allows you to see the info for each city ... and even each village, where there is no weather station, so it is necessarily calculated from the models (or a model / survey mix)

Example with a village of Drôme (so in your corner) that I took at random:

Wind Rose of La Motte-Chalancon: https://www.meteoblue.com/fr/meteo/arch ... PER_SECOND

What is the closest village to your project?

Here are 3 sites (among others) used by paragliders:

https://www.windguru.cz/
https://fr.windfinder.com/
https://www.paraglidingmap.com/

[Forhorse]

I do not agree. Nothing can replace an on-site study, at the same place where the wind turbine will be installed. Because within 50m it can change everything.
Certainly not for large "industrial" wind turbines 100m high, but for small domestic ones of some kW to 12m high or less we can have big differences, especially (as is the case here) when there is relief.

[Christophe]

a) Well considering the current climate change I am not sure that a study on 1 year is really significant for the next 20 years and this in one direction as in the other (I think that the winds will strengthen .. . see b)) ... and it's 1 year lost in a project that doesn't seem so expensive (self construction) ... so a base on models will already give a good approximation (I would say with only 20% error ... one way or the other ...)

b) The relief can be an excellent ally to enjoy the breezes of plains (the day) and mountain (the evening) ...breezes that do NOT appear in weather models ... each sunny side being the systematic target of these breezes (provided there is enough sun and slope)

We fall back on the idea of ​​the Elioth project and "solar mountains" (in fact wind turbines is more correct): energies-renewable / solar project-mountain-elioth-the-eolien-de-breaker to-valley-t14512.html

These breezes will greatly strengthen with warming! Paragliding we already feel it: old pilots no longer recognize sites at all as they were 20 years ago! They are becoming more and more dangerous in fact ...