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TitleCompact automotive thermoelectric generator with embedded heat pipes for thermal control
Author(s)Pacheco, N.
Brito, F.P.
Vieira, R.
Martins, Jorge
Barbosa, H.
Gonçalves, L. M.
KeywordsThermoelectric generator
Variable thermal load
Waste heat recovery
Thermal control
Heat pipes
Variable conductance heat pipes
Issue date2020
PublisherPergamon-Elsevier Science Ltd
CitationN. Pacheco, F.P. Brito, R. Vieira, J. Martins, L.M. Goncalves, Compact Automotive Thermoelectric Generator with Embedded Heat Pipes for Thermal Control, Energy, 197 (2020) 117154;
Abstract(s)Currently, the automotive industry faces challenges to implement solutions that provide reductions in energy consumption, pollutants and greenhouse-gas (GHG) emissions. Exhaust heat recovery employing Thermoelectric generators (TEGs) enables the direct conversion of heat into electric energy without moving parts and little to no maintenance. On-board electrical production is especially useful given the growing electrification trend of road vehicles. The present work assesses the performance of a novel temperature-controlled thermoelectric generator (TCTG) concept in a light duty vehicle and its impact on fuel economy and GHG emissions under realistic driving conditions. The novel exhaust heat exchanger (HE) concept consists of corrugated pipes embedded in a cast aluminium matrix along with variable conductance heat pipes (VCHPs) acting as spreaders of excess heat along the longitudinal direction. This concept seems to have a quite good potential for highly variable thermal load applications, as it is able to avoid overheating by spreading heat instead of wasting it through by-pass systems. Furthermore, when compared to previous concepts by the group, it does not need gravity assistance and has a form factor similar to conventional generators. It also appears to be capable of delivering a breakthrough electric output for TEG systems in such light vehicles, with as much as 572 W and 1538 W of average and maximum electric powers during a driving cycle, respectively, and showing a quite promising reduction of 5.4% in fuel consumption and CO2 emissions.
AccessOpen access
Appears in Collections:CMEMS - Artigos em revistas internacionais/Papers in international journals
MEtRICs - Artigos em revistas internacionais/Papers in international journals

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