Der thermoelektrische Generator von BMW macht Abwärme nutzbar

Liebl, Johannes; Neugebauer, Stephan; Eder, Alexander; Linde, Matthias; Mazar, Boris; Stütz, Wolfgang

doi:10.1007/bf03225479

Cited by 9 publications

(5 citation statements)

References 1 publication

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“…The latter solution would become particularly sought after in the automotive industry, where rounded TEGs are needed for the recovery of energy from the hot exhaust gases. 66,67 To better illustrate, how such a flexible device could work, we have designed and manufactured a prototype, which can be seen in Fig. 4.…”

Section: Applicationsmentioning

confidence: 99%

Adjusting the thermoelectric properties of copper(i) oxide–graphite–polymer pastes and the applications of such flexible composites

Andrei

Bethke

Rademann

2016

Phys. Chem. Chem. Phys.

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We present a facile alternative to other well known strategies for synthesizing flexible thermoelectric materials. Instead of printing thin active layers on flexible substrates or doping conductive polymers, we produce thermoelectric pastes, using a mixture of graphite, copper(I) oxide and polychlorotrifluoroethene. The Seebeck coefficient of the investigated pastes varies between 10 and 600 μV K(-1), while the electrical conductivity spans over an even wider range of 10(-4) to 10(2) S m(-1). Here, the influence of phenomena such as percolation on the electrical transport is revealed. The resulting power factor reaches 5.69 × 10(-4) ± 0.70 × 10(-4) μW m(-1) K(-2) for the graphite-polymer paste, with an unexpected minimum at a graphite molar fraction of approximately 0.4. The values are comparable to those of the powder mixtures, which are slightly higher, but less precisely tunable. Such compounds are further evaluated for practical applications. The graphite-polymer paste is used to exemplify, how a flexible thermoelectric sensor can be easily manufactured, step by step. Our results represent a proof of principle, that thermoelectric pastes are viable alternatives to current solutions. A further expansion of the scope for the composites can be achieved by using high performance thermoelectric materials and conductive polymers.

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Section: Applicationsmentioning

confidence: 99%

Adjusting the thermoelectric properties of copper(i) oxide–graphite–polymer pastes and the applications of such flexible composites

Andrei

Bethke

Rademann

2016

Phys. Chem. Chem. Phys.

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“…Die diesen Effekten zugrunde liegenden physikalischen Grundlagen und mathematischen Gleichungen wurden bereits in einem MTZ-Beitrag [2] ausführlich beschrieben. An dieser Stelle soll lediglich noch einmal auf die für die Praxis wichtigsten Zusammenhänge eingegangen werden.…”

Section: Thermoelektrische Energiewandlungunclassified

“…Die Automobilhersteller prognostizieren für derzeit verfügbare thermoelektrische Materialien mit ZT-Werten von 0,85 eine elektrische Leistung von 600 W beziehungsweise ein Verbrauchspotenzial von 5 % bei Autobahnfahrt [2]. Diese Werte können bei weiterer Steigerung der ZT-Werte noch übertroffen werden, vorausgesetzt die darüber hinaus erzeugte Leistung wird von den elektrischen Verbrauchern auch benötigt und abgenommen.…”

Section: Zusammenfassung Und Ausblickunclassified

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Strom aus Abgasen — Fahrzeuggerechte Entwicklung Thermoelektrischer Generatoren

Friedrich¹,

Schier²,

Häfele³

et al. 2010

ATZ Automobiltech Z

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“…[ 8 – 10 ] One prominent example is the prototype developed by the BMW group for mass introduction in hot car exhausts, which generates directly electricity from the waste heat. [ 11 ]…”

Section: Introductionmentioning

confidence: 99%

Decreasing the Effective Thermal Conductivity in Glass Supported Thermoelectric Layers

2016

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As thermoelectric devices begin to make their way into commercial applications, the emphasis is put on decreasing the thermal conductivity. In this purely theoretical study, finite element analysis is used to determine the effect of a supporting material on the thermal conductivity of a thermoelectric module. The simulations illustrate the heat transfer along a sample, consisting from Cu, Cu2O and PbTe thermoelectric layers on a 1 mm thick Pyrex glass substrate. The influence of two different types of heating, at a constant temperature and at a constant heat flux, is also investigated. It is revealed that the presence of a supporting material plays an important role on lowering the effective thermal conductivity of the layer-substrate ensemble. By using thinner thermoelectric layers the effective thermal conductivity is further reduced, almost down to the value of the glass substrate. As a result, the temperature gradient becomes steeper for a fixed heating temperature, which allows the production of devices with improved performance under certain conditions. Based on the simulation results, we also propose a model for a robust thin film thermoelectric device. With this suggestion, we invite the thermoelectric community to prove the applicability of the presented concept for practical purposes.

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Der thermoelektrische Generator von BMW macht Abwärme nutzbar

Cited by 9 publications

References 1 publication

Adjusting the thermoelectric properties of copper(i) oxide–graphite–polymer pastes and the applications of such flexible composites

Adjusting the thermoelectric properties of copper(i) oxide–graphite–polymer pastes and the applications of such flexible composites

Strom aus Abgasen — Fahrzeuggerechte Entwicklung Thermoelektrischer Generatoren

Decreasing the Effective Thermal Conductivity in Glass Supported Thermoelectric Layers

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