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Thermoelectric Device for Wind Turbine Generators

IP.com Disclosure Number: IPCOM000198724D
Published in the IP.com Journal: Volume 10 Issue 8B (2010-08-23)
Included in the Prior Art Database: 2010-Aug-23
Document File: 2 page(s) / 226K

Publishing Venue

Siemens

Related People

Juergen Carstens: CONTACT

Abstract

Wind turbine generators are one of the most sources for waste heat in gear turbines. The generator needs to be cooled due to high amount of waste heat. Cooling devices of wind turbine generators consist of air-cooling or liquid cooling or combination of both. An energy amount of approximately 150 kW is needed to keep the generator at its optimum temperature. Waste heat is not used, but released in the atmosphere. High energy amount is needed to keep the generator at optimum temperature by cooling. Cooling decreases the efficiency of wind turbines. In automotive applications waste heat of an exhaust gas from a combustion engine is used and transformed with a thermoelectric device to electric energy. A known thermoelectric device is designed by an automotive company. It is integrated in a series-production car. Thermoelectric transducers use the temperature decrease to induce electric voltage according to the SEEBECK principle. This system decreases fuel consumption of about 2 %, because electric energy out of the so-called thermoelectric generator (TEG) is used to drive electric subsystems, like climate control or heating system.

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Thermoelectric Device for Wind Turbine Generators

Idea: Matthias Wohlleb, DE-Aachen; Helmut Kölpin, DE-Aachen; Claudia Kumm

Wind turbine generators are one of the most sources for waste heat in gear turbine
needs to be cooled due to high amount of waste heat. Cooling devices of wind turbine g consist of air-cooling or liquid cooling or combination of both. An energy amount of approxima

er, DE-Aachen

s. The generator enerators tely 150

s not used, but released

temperature by

      is used and oelectric device is designed oelectric transducers use

K principle. This system o-called thermoelectric

system.

                                  igure 1). The forms the waste heat of a generator into electric energy. This electric an also be connected

is demanded, e.g. bine is increased.
e. Waste heat of

at different

thermoelectric devices are also resistant against vibration and granted transducer

temperature levels:

dical system, e.g. Bi2Te3,

m, e.g. PbTe,

                                                     ce. This potential CK effect. State of called epitactic material systems. With these materials thermic conductivity is increased without changing the electric conductivity.

For the solution, one transducer is closely connected to the generator housing. The counterpart of this transducer must be connected to cooling device. An electric storage device is needed to store the electric energy that is transmitted between these to transducers.

The thermoelectric process can be changed into a heating system. Therefore, this device needs to be supplied with electric voltage to produce heat (PELTIER effect). The produced heat can be used to warm up the generator before start after a long cold phase.

© SIEMENS AG 2010 file: 2010J13239.doc page: 1

kW is needed to keep the generator at its optimum temperature. Waste heat i
in the atmosphere. High energy amount is needed to keep the generator at optimum cooling. Cooling decreases the efficiency of wind turbines.

In automotive applications waste heat of an exhaust gas from a combustion engine transformed w...