Waste heat recovery of a diesel engine using a thermoelectric generator equipped with customized thermoelectric modules

Kim, Tae Young; Negash, Assmelash; Cho, Gyubaek

doi:10.1016/j.enconman.2016.07.013

Cited by 135 publications

(48 citation statements)

References 24 publications

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“…When several TEMs are electrically connected in series (N denotes the number), the overall open-circuit voltage (denoted U oc ) and internal resistance (denoted R) are given in Equations (3) and (4), respectively, and the practical output power (denoted P out ) is calculated in Equation (5) when external load resistance (denoted R L ) is connected to its overall output port. Basic circuit theory demonstrated that the output power of the TEMs (denoted P max ) reaches their maximum value when the external load resistance is equal to their inner resistance [31], P max can be calculated using Equation (6). The maximum power of five TEMs in series of each vertical row and six TEMs in series of each horizontal row is shown in Figure 5 (the engine revolution is 3200 r/min, the clamping pressure is 300 kg/m 2 , and the coolant flow rate is 9.27 L/min).…”

Section: Influence Of Temperature Uniformitymentioning

confidence: 99%

Performance Investigation of an Exhaust Thermoelectric Generator for Military SUV Application

et al. 2018

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Abstract:To analyze the thermoelectric power generation for sports utility vehicle (SUV) application, a novel thermoelectric generator (TEG) based on low-temperature Bi 2 Te 3 thermoelectric modules (TEMs) and a chaos-shaped brass heat exchanger is constructed. The temperature distribution of the TEG is analyzed based on an experimental setup, and the temperature uniformity optimization method is performed by chipping peak off and filling valley is taken to validate the improved output power. An automobile exhaust thermoelectric generator (AETEG) using four TEGs connected thermally in parallel and electrically in series is assembled into a prototype military SUV, its temperature distribution, output voltage, output power, system efficiency, inner resistance, and backpressure is analyzed, and several important influencing factors such as vehicle speed, clamping pressure, engine coolant flow rate, and ambient temperature on its output performance are tested. Experimental results demonstrate that higher vehicle speed, larger clamping pressure, faster engine coolant flow rate and lower ambient temperature can enhance the overall output performance, but the ambient temperature and coolant flow rate are less significant. The maximum output power of AETEG is 646.26 W, the corresponding conversion efficiency is 1.03%, and the increased backpressure changes from 1681 Pa to 1807 Pa when the highest vehicle speed is 125 km/h.

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Section: Influence Of Temperature Uniformitymentioning

confidence: 99%

Performance Investigation of an Exhaust Thermoelectric Generator for Military SUV Application

et al. 2018

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“…As a result, it does not cause the exhaust pressure to reverse inside the exhaust pipe, and there will be a large area for heat transfer, which improves the performance of the heat transmission. Tae Young Kim [17] studied the efficiency of the heat released with recycled exhaust gas. The experiment used 40 thermoelectric generators equipped with a large diesel engine, and operated with the engine at a rotation cycle of 1000, 1500, and 2000 rpm.…”

Section: Exhaust Gas Heat Recovery Technologymentioning

confidence: 99%

Design and Optimization of an Integrated Turbo-Generator and Thermoelectric Generator for Vehicle Exhaust Electrical Energy Recovery

et al. 2019

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The performance of turbo-generators significantly depends on the design of the power turbine. In addition, the thermoelectric generator can convert waste heat into another source of energy. This research aims to design and optimize an integrated turbo-generator and thermoelectric generator for diesel engines. The goal is to generate electricity from the vehicle exhaust gas. Electrical energy is derived from generators using the flow, pressure, and temperature of exhaust gases from combustion engines and heat-waste. In the case of turbo-generators and thermoelectric generators, the system automatically adjusts the power provided by an inverter. Typically, vehicle exhausts are discarded to the environment. Hence, the proposed conversion to electrical energy will reduce the alternator charging system. This work focuses on design optimization of a turbo-generator and thermoelectric generator for 2500 cc. diesel engines, due to their widespread usage. The concept, however, can also be applied to gasoline engines. Moreover, this model is designed for a hybrid vehicle. Charging during running will save time at the charging station. The optimization by variable van angles of 40°, 50°, 62°, 70°, and 80° shows that the best output power is 62°, which is identical to that calculated. The maximum power outputted from the designed prototype was 1262 watts when operating with an exhaust mass flow rate of 0.1024 kg/s at 3400 rpm (high performance of the engine). This research aims to reduce fuel consumption and reduce pollution from the exhaust, especially for hybrid vehicles.

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“…Moreover, the cold side of the TEM may cooled by a refrigerant or air. The preliminary work focused on the design optimization of TEG system [14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Analysis of an automotive thermoelectric generator on a gasoline engine

et al. 2020

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This study determined the heat, flow, and electrical power values of and automotive thermoelectric generation system integrated in the exhaust system of an internal combustion gasoline engine. The combustion analyses of the engine integrated with and without automotive thermoelectric generation were carried out. The 20 thermoelectric modules were placed on the rectangular structure which was made of the aluminum 6061 material. The thermoelectric modules were electrically connected to each other in series. The gasoline engine was operated at full load at 1250, 1750, and 2250 rpm, and the electrical energy generated by the automotive thermoelectric generation system was calculated. At the same time, the heat and flow analyses of the automotive thermoelectric generation system were performed using the ANSYS FLUENT commercial software.

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Waste heat recovery of a diesel engine using a thermoelectric generator equipped with customized thermoelectric modules

Cited by 135 publications

References 24 publications

Performance Investigation of an Exhaust Thermoelectric Generator for Military SUV Application

Performance Investigation of an Exhaust Thermoelectric Generator for Military SUV Application

Design and Optimization of an Integrated Turbo-Generator and Thermoelectric Generator for Vehicle Exhaust Electrical Energy Recovery

Analysis of an automotive thermoelectric generator on a gasoline engine

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