information for engineers

Engineers are now hugely influential in the design team thanks to the growing importance of energy and carbon dioxide emissions. From an early stage, engineers are being tasked with complex integration of energy efficiency and energy supply, and where appropriate we hope quietrevolution can be one part of your toolkit.

quietrevolution has grown out of XCO2, the energy and building services engineering practice, and has built on our experience in the sector and our understanding of its needs. We are committed to providing a high level of technical information to our customers and partners and are working with a variety of engineers including Arup, WSP, FaberMaunsell, BDP, Buro Happold and others, on projects all over the world.

A wind turbine is used to convert the kinetic energy from the wind into mechanical energy which is then ultimately converted into usable electrical energy.

The mechanical energy arising from the torque and rotational speed is extracted and converted into electrical energy with the use of a generator. The generator is housed at the base of the rotor, it consists of a rotating set of permanent magnets surrounded by a stationary set of coil wound conductors. As the magnetic field passes the coils it generates electrical energy from a principle known as electromagnetic induction. The principle is the reverse of an electric motor which converts electrical energy into mechanical energy. The coils within the generator are grouped into sets of three and produce three separate phases of electrical energy that vary with rotor speed, therefore generating a variable three phase alternating current (AC) power supply.

The variable nature of this electrical energy needs to be stabilized into something usable. This is achieved using power electronics located on the turbine control panel, which convert the variable three phase current into a more manageable direct current (DC). This is then converted back into a three phase AC with a constant voltage and frequency suitable for grid connection and on site use.

The output from the qr5 turbine will supply local usage therefore offsetting requirements from the grid. If the output of the turbine is greater than the local usage the surplus is exported to the grid.

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Certification
The qr5 has been designed in accordance with the BSEN 61400-2:1996 and has undergone a series of tests for certification.
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Wind tunnel testing at the National Research Centre in Canada.

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