Blown Away by Savings Aston Farm in Exmoor National Park has been owned by the Halliday family for over 150 years. Using the Power Predictor, George Halliday was able to discover that a small wind turbine could help not just to reduce his CO2 emissions, but also save him nearly £7000 a year! To reduce turbulence from surrounding trees and buildings, George mounted the Power Predictor in a local field using his home-made ten meter mast. For those of you not quite as ambitious as George, there is a range of masts available.
Written by Michael Boxwell I am often asked which is better - wind turbines, or solar modules. The answer, of course, is that it isn't as simple as stating which technology is better - both have their benefits and drawbacks and which technology is best depends very much on the application and the location of the system. For large scale applications - such as for commercial scale power production for the national grid - wind turbines are the most obvious solution.
Large scale wind turbines are efficient and effective, and can be installed in a variety of locations - including far out to sea - comparatively quickly. Unlike the early large turbines, modern turbines are virtually silent and the largest systems can generate in the region of 2 megawatts of power - enough to power over 2,000 homes. On smaller scale systems, turbines can be a good alternative to solar power, but more often than not achieve their best when implemented together with a solar system: a small wind turbine can generate electricity in a breeze even when the sun is not shining, whilst the solar modules can generate electricity during the daytime when the wind is not blowing. Small wind turbines do have disadvantages however, and are very site specific. Compared to large turbines used by the power companies, small wind turbines are not particularly efficient and need to be situated in an area of above average wind in order to generate reasonable amounts of power. They also require a very smooth airflow: the smaller turbines are very susceptible to turbulence - so if you live near to a busy road, or near trees, or in a built up area, a wind turbine is unlikely to work well for you. Turbulent air - where the wind is constantly changing direction - leaves the turbines constantly changing direction, constantly chasing the wind rather than extracting power from it.
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For solar panels, the measurement of kWh refers to the. These ways of measuring solar energy is important when sizing a PV. Power meters monitor your.
The UK DIY chain, B&Q, found this to their cost when they started selling their own 1kW turbine system in 2006. Eager customers lined up to buy the competitively priced systems only to find that they did not provide the power advertised.
More often than not, the turbines were installed in inappropriate locations - on the sides of houses, in built up areas, and not high enough to catch the breeze. As a consequence, B&Q withdrew the turbines from sale in early 2009. An example of a less-than-ideal turbine installation: here a turbine has been installed in a built up area, close to tall trees and too close to the roof of the house. The turbine will be adversely affected from turbulance from the trees that are too close to the turbine and from up-winds from the roof.
The problem is not with the wind turbine itself, but the unsuitable location in which it has been installed. Wind turbines work best near the coast, or in open exposed areas where average wind speeds are high.
Wind And Solar Power
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Wind And Solar Energy
Ideally, turbines should be mounted high up - even small turbines are often mounted 8-10 meters high in order to get sufficient wind power - and away from buildings. Roof mounting a turbine is not ideal as the building itself generates turbulence, and the vibrations from a turbine being affected by turbulent air can be magnified through brick walls, creating a loud and annoying vibrating sound. All this means substantial foundations and framework for a turbine which can add significant cost to a project. This height can also cause problems if you are planning to mount a system close to neighbouring properties.