Skip to main content
Observer Ethical awards Winners 2011

YouGen Blog

Measure the wind before you install a turbine

Posted by Cathy Debenham on 5 August 2009 at 9:08 am

Product and installation standards for domestic wind turbines are needed, as are improved wind speed prediction and better site assessments. These are some of the key conclusions of the Energy Saving Trust's microwind research published in July.

On measuring the wind speed, EST recommends that, where practical, people thinking of getting a wind turbine should use an anemometer for at least three months to find out their average wind speed. Its field trials found that the NOABL database, which is often used to determine a site's potential, over-estimates the wind speed at many sites. It is particularly likely to over-estimate in urban and suburban locations, as it doesn't consider the impact of local obstructions such as trees and buildings.

It also found that a number of manufacturers' power curves (which indicate expected performance of the turbine) are inaccurate or incorrect. That, combined with no one common method by which power curves are calculated, makes it difficult for potential customers to compare the performance of different products. EST advises people treat power curves with caution until new standards are in place. These have been developed by the Microgeneration Certification Scheme (MCS) and are expected to be in place by the end of 2009.

EST results confirmed Encraft's Warwick Wind Trials findings last year that building mounted turbines are not effective in urban or suburban areas. None of those tested generated more than 200kWh (or £26) a year. Even in a good site returns were low. The best performer was a 1.5kW turbine in Scotland which generated 975kWh (£127) of electricity. EST concluded that building mounted turbines work best when they have an adequate, unobstructed wind resource and are sited on the gable end of a building, above the ridge line.

The best performing free standing sites were always remote, rural locations - usually individual dwellings near the coast or on on exposed land such as moors. In these cases the amount of electricity generated tended to be in line with the manufacturer's predictions. Those sited in built up areas did not perform so well, generally because the wind strength was less than anticipated.

Using the field trial results EST has calculated that there are likely to be 455,650 domestic properties in the UK which are suitable for wind generation. If they all installed turbines it could generate 3.1 per cent of domestic energy demand.

 Photo by brewbooks


If you have a question about anything in the above blog, please ask it in the comments section below.

Like this blog? Keep up to date with our free monthly newsletter


2 comments - read them below or add one


PhilageComment left on: 23 March 2020 at 8:28 am

Measure the wind before you install a turbine. Check air pressue to measure the wind and after the whole you can easily install a turbine and make myassignmenthelp australia things perfect because everything is important when we start to meaure this whole and whole for these are important.

report abuse

Cathy Debenham

Cathy DebenhamComment left on: 11 August 2009 at 11:41 am

I forgot to point out in this post that you can measure the wind speed easily, and at a reasonable price, using the Power Predictor. (Click here for my review of it).

report abuse

Leave a comment

You must log in to make a comment. If you haven't already registered, please sign up as a company or an individual, then come back and have your say.