Fuel economy analysis under a WLTP cycle on a mid-size vehicle equipped with a thermoelectric energy recovery system

Massaguer, E.; Massaguer, A.; Pujol, Toni; Comamala, M.; Montoro, Lino; González, José Ramón Perán

doi:10.1016/j.energy.2019.05.004

Cited by 42 publications

(30 citation statements)

References 28 publications

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“…The worldwide harmonised light vehicle test procedure (WLTP) is adopted to test the converter. The WLTP consists of low speed, medium speed, high speed and extra-high speed, as shown in Figure 8 [26,27]. The parameters of the fuel cell used in the simulation are shown in Table 3.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…G uo−ui (s) is the transfer function from input to output and G f (s) is the feedforward compensation transfer function. According to Equation (19), the G uo−ui (s) can be obtained as in Equation (27), when the input voltage is 40 V. (27) not adjust the duty cycle to maintain the stability of the output voltage until the output voltage fluctuation is fed back to the control end. Due to the "soft" output characteristic of the fuel cell, the feedforward compensation network should be adopted for the DC-DC converter of fuel cell vehicles.…”

Section: Feedforward Compensation Network and Feedback Control Designmentioning

confidence: 99%

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Research on Composite Control Strategy of Quasi-Z-Source DC–DC Converter for Fuel Cell Vehicles

Zhou

Yang

et al. 2019

Applied Sciences

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The DC–DC converter for fuel cell vehicles requires high gain and wide voltage input range to boost the voltage of the fuel cell. However, with the traditional boost converter, it is difficult to meet the requirements of the fuel cell vehicle power system. Based on a quasi-Z-source network DC–DC converter, this paper proposes a composite controller, which includes a feedforward compensation network and feedback control to meet the control robustness requirement of the fuel cell vehicle power system. The dynamic model of the converter is obtained by using the state space averaging method and the small-signal dynamic modeling method. The input voltage and load disturbance experiments are performed on the DC–DC converter. Moreover, the converter is tested under the worldwide harmonised light vehicle test procedure (WLTP) to validate the effectiveness of the proposed composite controller. The simulation and experiment results show that the proposed composite controller effectively enhances the converter’s ability to resist input and load disturbance, and improves the dynamic response performance of the DC–DC converter for fuel cell vehicles.

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Section: Simulation Resultsmentioning

confidence: 99%

Section: Feedforward Compensation Network and Feedback Control Designmentioning

confidence: 99%

Research on Composite Control Strategy of Quasi-Z-Source DC–DC Converter for Fuel Cell Vehicles

Zhou

Yang

et al. 2019

Applied Sciences

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“…The main goal in this project is the reduction of energy consumption by the engine, by replacing part of the electric power produced by the alternator. On-board electricity production is especially useful given the growing electrical demands for road vehicles [3]. The concept explored by the research group aims at the recovery of the exhaust heat and its direct conversion into electric energy through thermoelectric generators (TEGs).…”

Section: Reason For Thermal Controlmentioning

confidence: 99%

“…Regarding the geometric optimization, the spacing between corrugated tubes was limited by the casting process to a minimum of 2 mm. The pipe spacing affects the total number of corrugated tubes in the exhaust gases, the heat transfer area, the exhaust velocity, and by consequence, the convective heat transfer coefficient and also the pressure drop which may affect negatively the engine power output due the increase of the exhaust-flow resistance [3], [41]. Figure 6 shows an example of the calculations in which the exhaust heat exchanger, including the block with embedded corrugated tubes and heat pipes, the TEG modules and the densely finned cooling plates were analysed for three horizontal rows of corrugated tubes.…”

Section: Thermal Design Optimization and Validationmentioning

confidence: 99%

Compact automotive thermoelectric generator with embedded heat pipes for thermal control

Pacheco

Brito

Vieira

et al. 2020

Energy

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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 bypass 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.

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“…Until August 2017, light vehicles in the European Union (with a reference mass not exceeding 2610 kg) were tested with the standard New European Driving Cycle (NEDC) driving test that included four repeated Urban Driving Cycles (UDCs) and one Extra Urban Driving Cycle (EUDC) [47][48][49][50]. Since September 2017, there has been a new procedure in force in the EU in the area of fuel consumption, carbon dioxide and exhaust emission standards: the Worldwide Harmonized Light-Duty Vehicles Test Procedure (WLTP) EU [51][52][53]. Although the WLTP is also a test carried out under laboratory conditions, it covers situations possibly closest to everyday actual operating conditions.…”

Section: Introductionmentioning

confidence: 99%

A Computer Tool for Modelling CO2 Emissions in Driving Cycles for Spark Ignition Engines Powered by Biofuels

Tucki¹

2021

Energies

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A driving cycle is a record intended to reflect the regular use of a given type of vehicle, presented as a speed profile recorded over a certain period of time. It is used for the assessment of engine pollutant emissions, fuel consumption analysis and environmental certification procedures. Different driving cycles are used, depending on the region of the world. In addition, drive cycles are used by car manufacturers to optimize vehicle drivelines. The basis of the work presented in the manuscript was a developed computer tool using tests on the Toyota Camry LE 2018 chassis dynamometer, the results of the optimization process of neural network structures and the properties of fuels and biofuels. As a result of the work of the computer tool, the consumption of petrol 95, ethanol, methanol, DME, CNG, LPG and CO2 emissions for the vehicle in question were analyzed in the following driving tests: Environmental Protection Agency (EPA US06 and EPA USSC03); Supplemental Federal Test Procedure (SFTP); Highway Fuel Economy Driving Schedule (HWFET); Federal Test Procedure (FTP-75–EPA); New European Driving Cycle (NEDC); Random Cycle Low (×05); Random Cycle High (×95); Mobile Air Conditioning Test Procedure (MAC TP); Common Artemis Driving Cycles (CADC–Artemis); Worldwide Harmonized Light-Duty Vehicle Test Procedure (WLTP).

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Fuel economy analysis under a WLTP cycle on a mid-size vehicle equipped with a thermoelectric energy recovery system

Cited by 42 publications

References 28 publications

Research on Composite Control Strategy of Quasi-Z-Source DC–DC Converter for Fuel Cell Vehicles

Research on Composite Control Strategy of Quasi-Z-Source DC–DC Converter for Fuel Cell Vehicles

Compact automotive thermoelectric generator with embedded heat pipes for thermal control

A Computer Tool for Modelling CO2 Emissions in Driving Cycles for Spark Ignition Engines Powered by Biofuels

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