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Title: A dynamic model for thermoelectric generator applied to vehicle waste heat recovery
Authors: Lan, Song
Yang, Zhijia
Chen, Rui
Stobart, Richard
Keywords: Module-based
Dynamic model
Thermoelectric generator
Automotive waste heat recovery
Issue Date: 2018
Publisher: Elsevier (© the authors)
Citation: LAN, S. ... et al, 2018. A dynamic model for thermoelectric generator applied to vehicle waste heat recovery. Applied Energy, 210, pp.327-338
Abstract: Waste heat recovery using a thermoelectric generator (TEG) is a promising approach for vehicle original equipment manufacturers to reduce fuel consumption and lower CO2 emissions. A TEG can convert otherwise wasted thermal energy from engines to electricity directly for use in the vehicle systems. This paper focuses on the development of a dynamic model of TEG system designed for vehicle waste heat recovery, which is made up of counter-flow heat exchangers (HXRs) and commercial thermoelectric modules (TEMs). The model is built from thermoelectric materials into a TEM and then into a TEG system. Compared to other TEG models, the tuning and validation process of the proposed model is more complete. Experiments are done on both a TEM test rig and a heavy-duty diesel engine, which is equipped with a prototype TEG on the exhaust gas recirculation (EGR) path. Simulations of steady-state operating points as well as the response to typical engine cycle test show good agreement with experimental data. A TEG installed upstream of the after-treatment system in a heavy-duty truck has been modelled to predict the temperatures and power output in a dynamic driving cycle. The simulation results of temperatures show the model can be used as a basis to develop a control system for dynamic operation to ensure safety operation of TEG and efficient operation of the after-treatment system. A comparison of power output of the systems under different scenarios underlines the importance of integration of TEM with HXRs. Based on the simulation results, around 20% average power output increase can be expected by optimizing the thermal contact conductance and the heat transfer coefficient of hot side HXR.
Description: This paper is published as Open Access by Elsevier under the CC BY 4.0 licence.
Sponsor: This work was supported by UK Engineering and Physical Sciences Research Council (EPSRC) [Grant No. EP/K026658/1].
Version: Published
DOI: 10.1016/j.apenergy.2017.11.004
URI: https://dspace.lboro.ac.uk/2134/27430
Publisher Link: https://doi.org/10.1016/j.apenergy.2017.11.004
ISSN: 0306-2619
Appears in Collections:Published Articles (Aeronautical and Automotive Engineering)

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