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Development of a thermoelectric module suitable for vehicles and based on CoSb3 manufactured close to production

Klein Altstedde, Mirko and Sottong, R. and Freitag, Thomas Oliver and Kober, Martin and Dreißigacker, Volker and Zabrocki, K. and Szabo, P. (2014) Development of a thermoelectric module suitable for vehicles and based on CoSb3 manufactured close to production. ICT2014 - International Conference on Thermoelectrics, 6-10. Jul. 2014, USA, Nashville.

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Despite the ongoing electrification of vehicle propulsion systems, vehicles with combustion engines will continue to bear the brunt of passenger services world-wide for the next few decades. As a result, the DLR Institute of Vehicle Concepts, the Institute of Materials Research and the Institute of Technical Thermodynamics have focused on utilising the exhaust heat of internal combustion engines by means of thermoelectric generators (TEGs). Their primary goal is the development of cost-efficient TEGs with long-term stability and maximised energy yield. In addition to the overall TEG system design, the development of long-term stable, efficient thermoelectric modules (TEMs) for high-temperature applications is a great challenge. This paper presents the results of internal development work and reveals an expedient module design for use in TEGs suitable for vehicles. The TEM requirements identified, which were obtained by means of experiments on the test vehicle and test bench, are described first. Doped semiconductor materials were produced and characterised by production methods capable of being scaled up in order to represent series application. The results in terms of thermoelectric properties (Seebeck coefficient, electrical conductivity and thermal conductivity) were used for the simulative design of a thermoelectric module using a constant-property model and with the aid of FEM calculations. Thermomechanical calculations of material stability were carried out in addition to the TEM's thermodynamic and thermoelectric design. The film sequence within the module represented a special challenge. Multilayer films facilitated adaptation of the thermal and mechanical properties of plasma-sprayed films. A joint which dispenses with solder additives was also possible using multilayer films. The research resulted in a functionally-optimised module design, which was enhanced for use in motor vehicles using process flexibility and close-to-production manufacturing methods.

Item URL in elib:https://elib.dlr.de/93747/
Document Type:Conference or Workshop Item (Poster)
Title:Development of a thermoelectric module suitable for vehicles and based on CoSb3 manufactured close to production
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Klein Altstedde, MirkoMirko.KleinAltstedde (at) dlr.deUNSPECIFIED
Sottong, R.German Aerospace Center, Institute of Materials Research, Köln, GermanyUNSPECIFIED
Freitag, Thomas OliverThomas.Freitag (at) dlr.dehttps://orcid.org/0000-0003-3859-1822
Kober, Martinmartin.kober (at) dlr.dehttps://orcid.org/0000-0001-6988-5159
Dreißigacker, Volkervolker.dreissigacker (at) dlr.deUNSPECIFIED
Zabrocki, K.German Aerospace Center, Institute of Materials Research, Köln, GermanyUNSPECIFIED
Date:July 2014
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Thermoelectric Module, Thermoelectric Generator, Waste heat recovery, Thermomechanics
Event Title:ICT2014 - International Conference on Thermoelectrics
Event Location:USA, Nashville
Event Type:international Conference
Event Dates:6-10. Jul. 2014
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Terrestrial Vehicles (old)
DLR - Research area:Transport
DLR - Program:V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):V - Fahrzeugenergiesystem III (old)
Location: Stuttgart
Institutes and Institutions:Institute of Vehicle Concepts > Alternative Energiewandler
Institute of Materials Research > Thermoelectric Materials and Systems
Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Klein Altstedde, Mirko
Deposited On:17 Dec 2014 08:13
Last Modified:27 Nov 2017 16:28

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