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Products  |  Thermal Engineering and HVAC  |  Renewable Energies  |  ET 220
ET 220 Energy Conversion in a Wind Power Station Show data sheet (pdf file) Print page
ET 220 - A product from the GUNT 2E range
Technical Description

  ET 220 is used to study how kinetic wind energy is converted into
electrical energy.
  The trainer consists of a experimental section and a control unit. The experimental section contains a laboratory-scale wind turbine and an axial fan. The control unit includes the control elements for the axial fan, the storage components for the electrical energy and the electrical consumers.
  The axial fan generates the air flow required to set the rotor in rotational motion. A flow straightener ensures the flow is consistent and low in turbulence. A generator converts the rotor's kinetic energy into electrical energy. The electrical energy is fed into a stand-alone system that is not connected to the mains grid. A charge controller in an accumulator provides intermediate storage of the electrical energy. The electrical energy can be used by means of an electrical load. There are two bulbs that can be used as consumers. Optionally, it is also possible to connect an external consumer (such as a heater). There is no provision to feed into a public power grid.
  The wind velocity is varied by changing the rotational speed of the fan. The following measurements are captured: wind velocity in front of and behind the rotor, speed of the rotor, voltage and current. The measurements are read off digital displays and can simultaneously be transmitted directly to a PC via USB and analysed there using the software included.

  A circuit diagram printed on the control unit makes it easy to assign

all components within the isolated network.
  Alternatively, in order to conduct experiments under real wind conditions, a larger wind generator (ET 220.01) can be connected to the control panel. This wind generator is designed to be set up outside in the open air.
  The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.

Learning Objectives / Experiments

- conversion of kinetic wind energy into electrical

- function and design of an stand-alone system with

  a wind turbine
- determining the power coefficient as a function of

  tip speed ratio
- energy balance in a wind power station
- determining the efficiency of a wind power station


* Conversion of kinetic wind energy into 
  electrical energy1

* Practical experiments in laboratory scale1
* Software for data acquisition via USB

Available accessories
ET 220.01 -- Wind Generator

[1] trainer for converting kinetic wind energy into electrical energy
[2] laboratory-scale wind power station, stand-alone operation
[3] axial fan with continuously variable speed (wind velocity)
[4] flow straightener for consistent wind conditions
[5] generator for converting the kinetic energy into electrical energy
[6] accumulator for storing the electrical energy
[7] two bulbs as electrical load (consumers)
[8] measurement of wind velocity in front of and behind the rotor
[9] measurement of rotational speed of the rotor
[10] measurement of current and voltage
[11] digital displays for the measured values
[12] GUNT software for data acquisition via USB
under Windows Vista or Windows 7


Technical Data

Axial fan
- max. flow rate: 5m/s
- max. power: 1,5kW
- diameter: 510mm
- max. output: 60W
- voltage: 12VDC
- max. charging current: 5A
- voltage: 12VDC
- capacity: 8Ah
Electrical load (bulbs)
- voltage: 12VDC
- power: 55W each
Measuring ranges
- wind velocity: 0,3...50m/s
- speed: 0...3.000min-1
- voltage: 0...20VDC
- current: 0...35A


Dimensions and Weight
LxWxH: 2.610x870x1.645mm (experimental section)
LxWxH: 1.520x790x1.760mm (control unit)
Total weight: approx. 410kg
Required for Operation
400V, 50/60Hz, 3 phases or 230V, 60Hz, 3 phases
Scope of Delivery

1 experimental section
1 control unit

1 multimeter
1 CD with GUNT software + USB cable
1 set of instructional material

Order Details

061.22000  ET 220  Energy Conversion in a
                                 Wind Power Station

© 2005 G.U.N.T. Gerätebau GmbH