Effect of the Sequence of the Thermoelectric Generator and the Three-Way Catalytic Converter on Exhaust Gas Conversion Efficiency

Su, Chuqi; Tong, Naiqiang; Xu, Yabo; Shan, Chen; Liu, Xun

doi:10.1007/s11664-012-2454-2

Cited by 17 publications

(6 citation statements)

References 5 publications

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“…The commercial computational fluid dynamics (CFD) software ANSYS-CFX ® was used, since it has the capability to correctly simulate the heat transfer between fluid flows and solid parts. Several researchers have applied this software to successfully predict heat transfer problems involving both fluid and solids (e.g., [26]).…”

Section: Simulation Set Upmentioning

confidence: 99%

Power and Fuel Economy of a Radial Automotive Thermoelectric Generator: Experimental and Numerical Studies

et al. 2018

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Recent developments of high performance thermoelectric (TE) materials have increased the interest of using this technology to directly convert waste heat into electricity. In the automotive sector, many automotive thermoelectric generators (ATEGs) designs use TE modules (TEMs) with high hot side temperatures to cope with high engine load regimes. Here, we develop a new concept of a radial ATEG that is specifically designed to work with low temperature TEMs, which enables the use of Pb-free modules and reduces the thermal stress of the device. A prototype is built and tested at different regimes in an engine test bench. A numerical model of the ATEG is developed and validated. The consequences of modifying (1) the exchange area between the heat absorber and the exhaust gases and (2) the effective figure of merit of TEMs on the electrical output power and fuel economy are investigated by means of simulations. Results indicate that the maximum fuel economy (1.3%) is not attained at the point of maximum output power (228 W). In terms of fuel economy, the back pressure at the exhaust penalizes high mass flow regimes. We use a dimensionless parameter to analyze the potential of the ATEG for reducing fuel consumption.

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Section: Simulation Set Upmentioning

confidence: 99%

Power and Fuel Economy of a Radial Automotive Thermoelectric Generator: Experimental and Numerical Studies

et al. 2018

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“…1 generally includes heat exchanger, cooling unit, thermoelectric modules, and clamping and fixed device. It is concluded that the layout with the front three-way catalytic converter has an advantage over the other layout mode under current conditions [12]. Thermoelectric modules containing a large number of n-type and p-type semiconductors, arranged in couples, are clamped with sufficient compressive force between a heat exchanger connected to the exhaust pipe and cooling water tank in an exhaustbased TEG like a sandwich by clamping and fixed device.…”

Section: Simulation Model Of the Heat Exchangersmentioning

confidence: 99%

Thermoelectric generator heat performance study about improved fin structures

Wang¹,

Ma²

2018

Therm sci

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This paper involves an exhaust gas waste heat recovery system for vehicles, which uses thermoelectric modules and a heat exchanger to produce electric power. Based on summarizing the latest research of vehicle exhaust thermoelectric generator, it presents two new fin structures for the cylindrical heat exchanger in a thermoelectric generator system. It mainly studies the thermal performance of two kinds of 3-D cylindrical heat exchanger models including spiral-fin heat exchanger with variable pitch in a CFD simulation environment. In terms of interface temperature and thermal uniformity and based on an evaluation method of the temperature uniformity for the heat exchangers, the thermal characteristics of heat exchangers with different pitch angle of the twisted fins, pitch of spiral fin, fin thickness, and fin height are discussed. Two new fin structures are feasible to enhance the heat transfer performance of heat exchanger.

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“…Back Pressure. Considered the increased back pressure will add load to engine, the working condition that the rotation speed of engine from 1000r/min to 3000r/min is simulated [6], the pressure drops in the three different cases of layouts presented above are given in Fig.9, Fig.10 and Fig.11, respectively. It reveals that the exhaust flows quicker as the rotation speed of engine increases, and its back pressure rises accordingly.…”

Section: Simulation and Analysismentioning

confidence: 99%

Study on the Compatibility between Heat Exchanger used in Automobile Exhaust Thermoelectric Generator and Engine

Quan¹,

Zhou²,

Huang³

2016

dteees

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Abstract.To enhance the compatibility between heat exchanger used in automobile exhaust thermoelectric generator (AETEG) and internal combustion engine, three different kinds of layouts among heat exchanger, muffle and catalytic converter are designed, and the effects on the temperature uniformity and temperature distribution of heat exchanger, the back pressure of engine are also analyzed respectively. The simulated results reveal that the sequential layout of three-way catalytic converter-heat exchanger-automotive exhaust muffle is the best choice, for it ensures the smallest back drops of engine, considerable temperature uniformity and relatively higher temperature distribution of heat exchanger on the same occasion, which improves the performance degradation of engine during the exhaust thermoelectric generation and provides guiding reference for the optimization of AETEG.

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Effect of the Sequence of the Thermoelectric Generator and the Three-Way Catalytic Converter on Exhaust Gas Conversion Efficiency

Cited by 17 publications

References 5 publications

Power and Fuel Economy of a Radial Automotive Thermoelectric Generator: Experimental and Numerical Studies

Power and Fuel Economy of a Radial Automotive Thermoelectric Generator: Experimental and Numerical Studies

Thermoelectric generator heat performance study about improved fin structures

Study on the Compatibility between Heat Exchanger used in Automobile Exhaust Thermoelectric Generator and Engine

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