WIND POWER

Wind Turbine System

Wind turbines use the wind's energy to create electricity. The electricity generated is measured in kilowatt hours (kWh) - 1kWh is enough to power 1200 electric shaves or play a favourite CD 15 times. The wind turbine John West Renewables supply is the Evance R9000 model, which is the world's most efficient Small Wind Turbine (Annual Energy Yield of 8,780kWh with an Annual Mean Wind Speed of 5 metres per second).

The wind turbine is normally mounted on a monopole tower which is set into a foundation in the ground and then connected by cables (usually buried within a trench) into an inverter, which is positioned internally as near to the turbine installation as possible. The Wind Turbine produces Alternating Current (AC) which varies in both frequency and voltage as the turbine changes speed, this is fed via a Rectifier and an Inverter which covert it to Grid Voltage Alternating current (AC) electricity - the same as the electricity that comes from the National Grid - and is either used within the property or sold back to the Energy Supplier. Please note, if your property does not connect to the National Grid, then you can operate a stand-alone 'Off Grid' system with a battery back-up.

The output from a wind turbine is very sensitive to wind speed, which is measured in metres per second (m/s).

There is a cubic relationship between the output from a wind turbine (it's power) and the wind speed, so relatively minor increases in wind speed result in large changes in potential power output.

If the wind speed doubles, for example, the power output from the wind turbine will increase by a factor of eight, i.e. the wind speed doubles from 2m/s to 4m/s then you will get 8 times as much electricity produced from the same turbine.

The Annual Mean Wind Speed (AMWS) for a particular site is therefore the most important information to have in order to establish if you have a suitable site for a wind turbine.

Is my site suitable?

John West Renewables - Wind Turbine

The UK is the windiest country in Europe, experiencing a 40% share of Europe's total wind energy, yet only approximately 2% of our electricity requirements are currently generated by wind power.

The potential to increase generation is substantial and the South West of the country enjoys good AMWS's in the region of 5m/s. Wind turbines are ideally located in clear, open areas away from any obstructions such as houses or trees, as this creates turbulence which can significantly reduce the wind turbine's output. To maximise the wind energy available, good turbine siting is crucial - the turbine should ideally be located on as high a tower as possible subject to economic and planning restrictions.

To discuss your wind turbine requirements further, then please visit our showroom in Weston-Super-Mare or call now on 01934 622891.

To conclude, key benefits of a wind turbine include:

  • Earn a tax-free, index-linked income for the next 20 years (see Feed-In Tariff's page)
  • Reduce your electricity bills
  • Clean power source, i.e. no CO2 emissions thus helping reduce your carbon footprint and the effects of global warming
  • Improve your property's energy efficiency rating
  • Increase the value of your property
  • Increases your awareness of electricity use and encourages more energy efficient behaviour