The thermodynamic loss behaviour of internal combustion engines leads to high energy flows into the cooling and exhaust system. Thermoelectricity offers a high potential of recovery of this waste heat due to its advantageous behaviour for this problem. The Seebeck effect represents the main physical law for the generation of electrical energy from waste heat. The Peltier effect represents the complementary physical law. Both effects can raise the efficiency of subsystems in the vehicle. In this paper the two physical laws will be compared and evaluated in two different applications. Furthermore the requirements for system integration of both applications starting from the material level up to a proper implementation into the vehicle have been worked out. The evaluation of the requirements of thermoelectricity for waste heat recovery is performed with an example of a state of the art powertrain system. A clear extension of the application of thermoelectricity is shown for the bridge technology of a hybrid-electric powertrain. The highly stressed battery systems of electrical vehicles demand an optimal heat management in order to secure a battery life as well as efficient charging and discharging strategies. Thermoelectricity offers here innovative approaches for heat conditioning. Possible savings of electrical energy with a suitable thermo management will be shown.
Opportunities of waste heat recovery or heat conditioning via thermoelectricity in passenger cars: A comparison of the system integration challenges
2011
24 Seiten, 21 Bilder, 1 Tabelle, 4 Quellen
Aufsatz (Konferenz)
Englisch
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