ABSTRACT
This work develops a heat transfer model of a thermoelectric generator to explore the coupled relationship between high temperature exhaust flows, structure, and the external cooling air. The coupled heat transfer results showed that the fins reached a uniform high temperature, for the rated speed, the average temperature is 474 K. The coupled design scheme of the thermoelectric generator tested by installing it in a 4-cylinder turbocharged Diesel engine exhaust system. Comparison of the test and simulation results showed that as engine speed in-creased, the inlet and outlet exhaust temperatures of the thermoelectric generator exhibited a parabolic trend increase. The cooling water outlet temperature and the top, middle, and bottom fin temperatures increased linearly, and the coupled model was verified. From idle speed to rated speed, the top, middle, and bottom fin temperatures increased from 458 K to 476 K, 417 K to 463 K, and 406 K to 449 K, respectively; the cooling water outlet temperature increased from 293.6 K to approximately 303 K. Hence, the thermoelectric components installed in fins can experience temperature differences of over 100 K, the heat transfer efficiency can increase which ensures consistent output performance of the thermoelectric generator based on coupled design between the heat exchanger and thermoelectric modules array column.
KEYWORDS
PAPER SUBMITTED: 2018-11-12
PAPER REVISED: 2019-07-24
PAPER ACCEPTED: 2019-08-04
PUBLISHED ONLINE: 2019-09-15
THERMAL SCIENCE YEAR
2020, VOLUME
24, ISSUE
Issue 1, PAGES [281 - 292]
- Chuang Y, Chau KT. Thermoelectric automotive waste heat energy recovery using maximum power point tracking. Energy Convers Manage 2009;50:1506-12.
- Zhang Zheng, et al. Structure of High-Power Density Thermoelectric Generator Used for Automobile
- Riffat SB, Ma X. Thermoelectrics: a review of present and potential applications. Appl Therm Eng 2003;23:913-35.
- Zhang Zheng, et al.Machine-Thermal Coupling Stresses Analysis of the Fin-Type Structural Thermoelectric Generator
- Zhang Y, et al. Hightemperature and high-power-density nanostructured thermoelectric generator for automotive waste heat recovery. Energy Convers Manage 2015;105:946-50.
- Liu X, et al. Performance analysis of a waste heat recovery thermoelectric generation system for automotive application. Energy Convers Manage 2015;90:121-7.
- Hsiao Y Y, et al. A mathematic model of thermoelectric module with applications on waste heat recovery from automobile engine
- Xiao Guoquan. Investigation of Fluid-Solid Conjugate Heat Transfers for a Sedan Exhaust System
- Hendricks, T. J. Thermal system interactions in optimizing advanced thermoelectric energy recovery systems. Energy Resour. Technol., 2007, 129(3), 223-231.
- Shtern,M.Yu.Current Trends in Improving the Efficiency of Thermoelectric Generators. Proceedings of the 2019 IEEE Conference of Russian Young Researchers in Electrical and Electronic Engineering, ElConRus 2019, p 1914-1919
- Lazard, Myriam. Heat transfer in thermoelectricity: Modeling, optimization and design. Proceedings of the 7th IASME/WSEAS International Conference on Heat Transfer, Thermal Engineering and Environment, HTE '09, p: 129-134
- Georges Descombes*, Serge Boudigues. Modelling of waste heat recovery for combined heat and power applications. Applied Thermal Engineering 2009, 29:2610-2616
- Min Chen, Lasse A. Rosendahl, Thomas Condra.A three-dimensional numerical model of thermoelectric generators in fluid power systems. International Journal of Heat and Mass Transfer，2011，54：345-55
- Ren De-peng, et al.Complete numerical simulation of thethermoelectric coupling in a thermoelectric generator
- Deng Ya-dong，Fan Tao． Arrangement of TEG device and thermoelectric module
- DU Qun-gui, JIANG Xin-qiang, ZHANG Xiao-dan, GAO Jun-ling.Influence of Structure Parameters on Performance of the Thermoelectric Module
- Zhang Zheng, et al.Modeling and Numerical Analysis of Internal Enhanced Direct Thermoelectric Conversion System
- Zhang Zheng，Zheng Ding. Numerical Research on Heat Transfer Characteristics of the Intensified Thermoelectric System for Exhaust. Proceedings of 4th international conference on Intelligent Computation Technology and Automation (ICICTA2011), 862-5
- Weng CC, Huang MJ. A simulation study of automotive waste heat recovery using a thermoelectric power generator. Int J Therm Sci 2013;71:302-9.
- Hsiao YY, et al. A mathematic model of thermoelectric module with applications on waste heat recovery from automobile engine. Energy 2010;35:1447-54.
- Deng YD, et al. Thermal optimization of the heat exchanger in an automotive exhaust-based thermoelectric generator. J Electron Mater 2013;42:1634-40.
- He W, et al. Effects of heat transfer characteristics between fluid channels and thermoelectric modules on optimal thermoelectric performance. Energy Convers Manage 2016;113:201-8.
- Tian H, et al. Comparison and parameter optimization of a segmented thermoelectric generator by using the high temperature exhaust of a diesel engine. Energy 2015;84:121-30.
- Royale A, Simic M. Research in vehicles with thermal energy recovery systems. Procedia Comput Sci 2015;60:1443-52.
- Jing-Hui Meng, et al. Performance investigation and design optimization of a thermoelectric generator applied in automobile exhaust waste heat recovery. Energy Convers Manage 2016;120:71-80
