The Experts below are selected from a list of 15732 Experts worldwide ranked by ideXlab platform
Ibrahim Dincer - One of the best experts on this subject based on the ideXlab platform.
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Performance assessment of a Thermoelectric Generator applied to exhaust waste heat recovery
Applied Thermal Engineering, 2017Co-Authors: Murat Emre Demir, Ibrahim DincerAbstract:In this study, we propose a novel system for recovering waste heat of the automobile by means of a system based Thermoelectric Generator. The waste heat recovery (WHR) system is designed to be located after the exhaust manifold of the automobile for recovering and using the recovered heat, and it consists of a shell and tube heat exchanger whose pipes are covered with Thermoelectric materials. The exhaust gas of the automobile supplies the heat for the Thermoelectric Generator (TEG), and the incoming air from the front grill maintains the temperature difference for the TEG. Three different Perovskite-type oxide combined Thermoelectric materials (CaMn0.98Nb0.02O3, La1.98Sr0.02CuO4and GdCo0.95Ni0.05O3) are selected, considered and analyzed numerically. The variations of material properties, efficiency and power generated with respect to temperature and position are presented. The overall heat to electricity conversion efficiency of the TEG system is introduced by dimensionless quantities. The overall energy and exergy efficiencies of the heat recovery system are correlated and presented.
Shuzhong Wang - One of the best experts on this subject based on the ideXlab platform.
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experimental study on low temperature waste heat Thermoelectric Generator
Journal of Power Sources, 2009Co-Authors: Jianlin Yu, Shuzhong WangAbstract:In order to further studies on Thermoelectric generation, an experimental Thermoelectric Generator unit incorporating the commercially available Thermoelectric modules with the parallel-plate heat exchanger has been constructed. The experiments are carried out to examine the influences of the main operating conditions, the hot and cold fluid inlet temperatures, flow rates and the load resistance, on the power output and conversion efficiency. The two operation parameters such as the hot fluid inlet temperature and flow rate are found to significantly affect the maximum power output and conversion efficiency. A comparison of the experimental results with those from the previously published numerical model is also presented. The meaningful results obtained here may serve as a good guide for further improving the numerical model and conducting a system level optimization study in the next step. Also, the present study shows the promising potential of using this kind of Thermoelectric Generator for low-temperature waste heat recovery.
Jianlin Yu - One of the best experts on this subject based on the ideXlab platform.
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experimental study on low temperature waste heat Thermoelectric Generator
Journal of Power Sources, 2009Co-Authors: Jianlin Yu, Shuzhong WangAbstract:In order to further studies on Thermoelectric generation, an experimental Thermoelectric Generator unit incorporating the commercially available Thermoelectric modules with the parallel-plate heat exchanger has been constructed. The experiments are carried out to examine the influences of the main operating conditions, the hot and cold fluid inlet temperatures, flow rates and the load resistance, on the power output and conversion efficiency. The two operation parameters such as the hot fluid inlet temperature and flow rate are found to significantly affect the maximum power output and conversion efficiency. A comparison of the experimental results with those from the previously published numerical model is also presented. The meaningful results obtained here may serve as a good guide for further improving the numerical model and conducting a system level optimization study in the next step. Also, the present study shows the promising potential of using this kind of Thermoelectric Generator for low-temperature waste heat recovery.
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a numerical model for Thermoelectric Generator with the parallel plate heat exchanger
Journal of Power Sources, 2007Co-Authors: Jianlin Yu, Hua ZhaoAbstract:This paper presents a numerical model to predict the performance of Thermoelectric Generator with the parallel-plate heat exchanger. The model is based on an elemental approach and exhibits its feature in analyzing the temperature change in a Thermoelectric Generator and concomitantly its performance under operation conditions. The numerical simulated examples are demonstrated for the Thermoelectric Generator of parallel flow type and counter flow type in this paper. Simulation results show that the variations in temperature of the fluids in the Thermoelectric Generator are linear. The numerical model developed in this paper may be also applied to further optimization study for Thermoelectric Generator.
Dongping Zhang - One of the best experts on this subject based on the ideXlab platform.
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low cost flexible thin film Thermoelectric Generator on zinc based Thermoelectric materials
Applied Physics Letters, 2015Co-Authors: Ping Fan, Zhuanghao Zheng, Qingyun Lin, Jingting Luo, Guangxing Liang, Xingming Cai, Dongping ZhangAbstract:The high cost and complex production technique restrict the use of the conventional Thermoelectric Generators. In this work, we demonstrate a promising flexible thin film Thermoelectric Generator using the N-type Al-doped ZnO and P-type Zn-Sb based thin film. By using the cost-effective zinc based Thermoelectric materials and flexible substrate, we greatly reduce the cost production of thin film Thermoelectric Generator. The maximum output power of our device with 10 couples is 246.3 μW when the temperature difference is 180 K. The maximum output power of the flexible thin film Thermoelectric Generator produced per couple and per unit temperature difference was 0.14 μW per K-couple, which is about several times that of other thin film reported. The thin film Thermoelectric Generator with low cost and excellent output power was fabricated on flexible substrate, which is can be made into various shapes for micro- and nano-energy application.
S C Kaushik - One of the best experts on this subject based on the ideXlab platform.
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Performance Analysis and Optimization of Concentrating Solar Thermoelectric Generator
Journal of Electronic Materials, 2018Co-Authors: Randeep Lamba, Sushmera Manikandan, S C KaushikAbstract:A thermodynamic model for a concentrating solar Thermoelectric Generator considering the Thomson effect combined with Fourier heat conduction, Peltier, and Joule heating has been developed and optimized in MATLAB environment. The temperatures at the hot and cold junctions of the Thermoelectric Generator were evaluated by solving the energy balance equations at both junctions. The effects of the solar concentration ratio, input electrical current, number of thermocouples, and electrical load resistance ratio on the power output and energy and exergy efficiencies of the system were studied. Optimization studies were carried out for the STEG system, and the optimum number of thermocouples, concentration ratio, and resistance ratio determined. The results showed that the optimum values of these parameters are different for conditions of maximum power output and maximum energy and exergy efficiency. The optimum values of the concentration ratio and load resistance ratio for maximum energy efficiency of 5.85% and maximum exergy efficiency of 6.29% were found to be 180 and 1.3, respectively, with corresponding power output of 4.213 W. Furthermore, at higher concentration ratio (C = 600), the optimum number of thermocouples was found to be 101 for maximum power output of 13.75 W, maximum energy efficiency of 5.73%, and maximum exergy efficiency of 6.16%. Moreover, the optimum number of thermocouple was the same for conditions of maximum power output and energy and exergy efficiency. The results of this study may provide insight for design of actual concentrated solar Thermoelectric Generator systems.
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Energy and exergy analysis of solar heat pipe based annular Thermoelectric Generator system
Solar Energy, 2016Co-Authors: Sushmera Manikandan, S C KaushikAbstract:In this paper, the energy and exergy analysis of the solar annular Thermoelectric Generator (SATEG) considering Thomson effect in conjunction with Peltier, Joule and Fourier heat conduction have been introduced. Unlike the flat plate Thermoelectric Generator, the cross section area of an annular Thermoelectric Generator increase along the radial direction. Therefore, the annular Thermoelectric Generator possess higher total heat transfer area when compared with flat plate Thermoelectric Generator. The solar radiation absorbed by the solar heat pipe is given as the energy input to the SATEG. This system has the advantage of providing electrical power output and hot water output. The results of this study show that the power output and overall exergy efficiency of the SATEG are 1.92 W and 5.02% respectively and are 0.52% and 0.40% higher than that of solar flat plate Thermoelectric Generator (SFTEG). SATEG system has advantage of better thermal insulation, improved heat transfer characteristics, easy installation and maintenance when compared with the solar flat plate Thermoelectric Generator because of its cylindrical structure. This study will be helpful in designing of actual solar annular Thermoelectric generation systems.
