Modeling of a hybrid electric heavy duty vehicle to assess energy recovery using a thermoelectric generator

This study presents a new approach to minimize the amount of NOx emitted by diesel engines of Heavy-Duty Vehicles during low engine regimes and low gases temperature conditions. We propose the addition of an electric Exhaust Gas Heater (EGH) to make the SCR system inject the urea solution at low engine regimes. The second part of this study focuses on the viability to use an Automotive Thermoelectric Generator (ATEG) to generate the energy required by the EGH and thus avoiding the need to consume electrical energy from the vehicle’s system. This EGHATEG system is designed to be energetically closed, so there is no extra consumption of fuel. Experimental results show that NOx emissions reduce up to 80% when an EGH is added to a standard diesel-powered Euro VI Heavy Duty truck configuration. Simulations show that an ATEG installed downstream of the aftertreatment system can produce the energy required by the EGH. This system can improve SCR efficiency up to 55% during low engine regimes.

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THERMOELECTRIC GENERATOR FOR ENERGY RECOVERY FROM THE EXHAUST GASES OF HEAVY-DUTY VEHICLES

Proceeding of Proceedings of CHT-17 ICHMT International Symposium on Advances in Computational Heat Transfer May 28-June 1, 2017, Napoli, Italy ◽

10.1615/ichmt.2017.260 ◽

2017 ◽

Author(s):

Pedro Coelho

Keyword(s):

Energy Recovery ◽

Thermoelectric Generator ◽

Heavy Duty ◽

Exhaust Gases ◽

Heavy Duty Vehicles

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Nox emissions reduction analysis in a diesel Euro VI Heavy Duty vehicle using a thermoelectric generator and an exhaust heater

Fuel ◽

10.1016/j.fuel.2021.121029 ◽

2021 ◽

Vol 301 ◽

pp. 121029

Author(s):

J. Ximinis ◽

A. Massaguer ◽

T. Pujol ◽

E. Massaguer

Keyword(s):

Thermoelectric Generator ◽

Emissions Reduction ◽

Nox Emissions ◽

Heavy Duty ◽

Heavy Duty Vehicle

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Dynamic Modeling of Heavy-Duty Hybrid Electric Vehicles

Volume 16: Transportation Systems ◽

10.1115/imece2007-41923 ◽

2007 ◽

Cited By ~ 4

Author(s):

Lorenzo Serrao ◽

Christopher J. Hubert ◽

Giorgio Rizzoni

Keyword(s):

Dynamic Performance ◽

Management Strategies ◽

Heavy Duty ◽

Virtual Test ◽

Heavy Duty Vehicle ◽

Engine Cylinder ◽

Hybrid Electric ◽

Hybrid Electric Powertrain ◽

Dynamics Models ◽

Electric Powertrains

The paper presents a dynamic model of a hybrid electric powertrain for a heavy-duty vehicle. The model involves all powertrain components and considers purely longitudinal vehicle dynamics; time constants of 0.05 – 5 seconds are taken into account, thus neglecting high frequency phenomena (NVH, engine cylinder-to-cylinder motion). Integration with handling dynamics models, characterized by the same frequency range, is possible but not discussed here. The simulator is an accurate virtual test bench for energy management strategies applied to hybrid electric powertrains, capable of predicting both fuel consumption and dynamic performance. The accuracy in both metrics is demonstrated by comparison with experimental data collected on a conventional heavy-duty refuse truck and a prototype of a series hybrid electric version of the same vehicle.

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Energy Efficient Thermoelectric Generator-Powered Localized Air-Conditioning System Applied in a Heavy-Duty Vehicle

Journal of Energy Resources Technology ◽

10.1115/1.4039607 ◽

2018 ◽

Vol 140 (7) ◽

Cited By ~ 4

Author(s):

Yuan Ran ◽

Yadong Deng ◽

Tao Hu ◽

Chuqi Su ◽

Xun Liu

Keyword(s):

Fuel Economy ◽

Energy Efficient ◽

Air Conditioning ◽

Thermoelectric Generator ◽

High Efficiency ◽

Simulation Analysis ◽

Heavy Duty ◽

Efficient Technology ◽

Air Conditioning System ◽

Heavy Duty Vehicle

Thermoelectric technology applied in vehicle has become significantly essential due to the global energy crisis and the environmental protection issues. A novelty energy efficient technology called localized air-conditioning (LAC) powered by thermoelectric generator (TEG), i.e., TEG-powered LAC, is proposed in order to better utilize the generated power of TEG, only then will the fuel economy improvement be achieved. This system which has little impact on the original automotive electrical system is basically comprised of LAC, TEG, converter, and battery. The TEG can directly convert thermal energy to electrical energy to power the novelty energy-efficient air-conditioning system called LAC. The submodels of LAC and TEG are built and integrated into a heavy-duty vehicle to quantitatively assess its performance by simulation analysis. The results indicate that the novelty TEG-powered LAC system can work normally with high efficiency and improve the fuel economy by 3.7%. Therefore, this system resolves the problem of proper use of the TEG's power and provides a fully new perspective to substitute the mechanical loads to engine with electrical loads powered by TEG to improve the fuel economy with much more practicality and rationality.

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