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http://dx.doi.org/10.5762/KAIS.2018.19.2.15

Thermal Caracteristics of the Automobile Exhaust gas based Heat exchanger with various Exhaust gas Temperature and Mass flow rate  

Kim, Dae-Wan (R&D Division, NTF Tech Co.)
Ekanayake, Gihan (Department of Mechanical Engineering, Dong-A University)
Lee, Moo-Yeon (Department of Mechanical Engineering, Dong-A University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.19, no.2, 2018 , pp. 15-20 More about this Journal
Abstract
The objective of this study is to numerically investigate the thermal characteristics of an automobile exhaust-based heat exchanger for automotive thermoelectric power generation with various exhaust gas mass flow rates and temperatures. The heat exchanger for automotive thermoelectric power generation has a square-type pin installed inside, so the maximum amount of heat can be transferred to the thermoelectric element from the heat energy coming from the automobile exhaust gas. The exhaust gas mass flow rate changed from 0.01, to 0.02, to 0.03 kg/s, and the exhaust gas temperature changed from 400, to 450, to 500, to 550, to $600^{\circ}C$, respectively. A numerical simulation was conducted by using the commercial program ANSYS CFX v17.0. Consequently, the exhaust gas pressure difference between the inlet and the outlet of the heat exchanger is determined according to the flow rate of the exhaust gas. When the mass flow rate of the exhaust gas increased, the pressure difference between the inlet and the outlet of the heat exchanger increased, but the exhaust gas pressure difference between the inlet of the heat exchanger and the outlet did not vary with the exhaust gas temperature. Therefore, in order to obtain the maximum surface temperature from the heat exchanger, the exhaust gas mass flow rate should be lower, and the exhaust gas temperature should be higher.
Keywords
Exhaust gas; Heat exchanger; Mass flow rate; Temperature; Thermoelectric generator;
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Times Cited By KSCI : 2  (Citation Analysis)
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1 C. W. Cho, H. S. Lee, Y. G. Chang, T. K. Lim, J. P. Won and G. S. Lee, "Performance Characteristics of Thermoelectric Generator Modules with Temperature Reduction in Exhausted Gas", Proc. of The Korean Society of Automotive Engineers 2015 Spring Annual Meeting, pp. 285-285, May, 2015.
2 Y. M. Bang, J. H. Seo, M. S. Patil, G. Ekanayake, Y. J. Doh, G. S. Lee J. K. Yeom and M. Y. Lee, "Study on Performance Characteristics in Thermoelectric Module with Variations of Exhaust Gas and Ambient Temperatures", Proc. of The Korean Society of Mechanical Engineers 2017 Spring Annual Meeting, pp. 46-47, May, 2017.
3 C. W. Cho, E. S. Shin, J. C. Jang and H. C. Suh, "Study on Effects of Exhaust Pipe on Temperature at Thermoelectric Generator", Proc. of The Korean Society of Automotive Engineers 2016 Spring Annual Meeting, pp. 260-260, May, 2016.
4 S. G. Park, B. D. In and K. H. Lee, "Performance of Thermoelectric Generator with Various Thermal Conditions of Exhaust Gas from Internal Combustion Engine", Proc. of The Korean Society of Automotive Engineers 2010 Fall Annual Meeting, pp. 456-461, November, 2010.
5 C. H. Kim, H. C. Kim, S. W. Han, H. C. Seo and Y. S. Ko, "Characteristics of Exhaust Pressure According to the Exhaust Pipe Geometric Variation in a Thermoelectric Generation Module", Proc. of The Korean Society of Automotive Engineers 2016 Spring Annual Meeting, pp. 89-90, May, 2016.
6 C. J. Moon, E. H. Cheang, J. M. Lim, S. J. Park, T. G. Kim and Y. G. Kim, "A Study for Thermoelectric Generator System And Caused Low Thermoelectric Power", Proc. of The Korean Solar Energy Society 2008 Spring Annual Meeting, pp. 68-74, April, 2008.
7 B. D. In, S. K. Park and K. H. Lee, "Numerical Study of Thermoelectric Generator with Various Thermal Conditions of Exhaust Gas from Internal Combustion Engine", Proc. of The Korean Society of Automotive Engineers 2011 Spring Annual Meeting, pp. 168-171, May, 2011.
8 G. Ekanayake, M. S. Patil, J. H. Seo, C. P. Cho and M. Y. Lee, "Numerical study on performance characteristics of the automotive exhaust base heat exchanger", Proc. of The Korean Society of Mechanical Engineers 2017 Fall Annual Meeting, pp. 33-34, November, 2017.
9 D. W. Lee, "An Experimental Study on Thermoelectric Generator Performance for Waste Coolant Recovery Systems in Vehicles", Korean Journal of Air-Conditioning and Refrigeration Engineering, vol. 26, no. 7, pp. 329-334, July, 2014. DOI: https://doi.org/10.6110/KJACR.2014.26.7.329   DOI
10 D. W. Lee, "Experimental Study on Thermoelectric Generator Performance for Waste Heat Recovery in Vehicles", Korean Journal of Air-Conditioning and Refrigeration Engineering, vol. 26, no. 6, pp. 329-334, June, 2014. DOI: https://doi.org/10.6110/KJACR.2014.26.6.287   DOI
11 Z. Han and R. D. Reitz, "A temperature wall function formulation for variable-density turbulent flows with application to engine convective heat transfer modeling", Int. J. Heat Mass Transfer. vol. 40, no. 3, pp. 613-25, 1997. DOI: https://doi.org/10.1016/0017-9310(96)00117-2   DOI