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Micro-Channel Heat Exchanger: An Exhaust Waste Heat Recovery Device
Technical Paper
2018-01-0052
ISSN: 0148-7191, e-ISSN: 2688-3627
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Abstract
Almost one-third of the fuel energy is wasted through the exhaust of a vehicle. An efficient waste heat recovery (WHR) process will undoubtedly lead to improved fuel efficiency and reduced greenhouse gases (GHG) emission. Currently, there are multiple WHR technologies that are being investigated by various entities in the auto industry. One relatively simple device to extract heat energy from the exhaust is a heat exchanger. Heat exchangers are used in some automotive applications to transfer heat from the hot exhaust gas to the colder coolant fluid to raise the coolant temperature. The warmer coolant fluid can be used for several purposes such as; faster heating of the engine’s lubrication oil and transmission fluids during cold starts, and faster cabin heating, which in turn, can potentially improve the overall engine efficiency and reduce exhaust emissions. Currently, in the US market place, hybrid vehicles, such as the Toyota Prius and Chevy Malibu, use heat exchangers as an integral part of their WHR systems. While traditional heat exchangers have been studied and employed in some automotive applications, the use of a micro-channel heat exchanger (MCHX) is a relatively new concept. Especially, in the realm of automobiles, use of micro-channel heat exchanger is unprecedented. As the name suggests, the micro-channel heat exchanger may provide a significant advantage in terms of packaging compared to a traditional heat exchanger when higher thermal performance is desired. However, the MCHX design has to be optimized for a particular application to avoid creating high backpressure in the exhaust system. In this paper, the design and performance of a micro-channel heat exchanger is described for a range of exhaust mass flows and temperatures. Predicted results from two 1-D models developed using the GT SUITE and Excel are compared and validated against preliminary experimental results from a prototype MCHX design. Finally, the thermal performance of the MCHX is compared to other traditional heat exchangers.
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Sahoo, D., Gardner, T., and Whyatt, G., "Micro-Channel Heat Exchanger: An Exhaust Waste Heat Recovery Device," SAE Technical Paper 2018-01-0052, 2018, https://doi.org/10.4271/2018-01-0052.Data Sets - Support Documents
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References
- Webb , R.L. Advances in Modeling Enhanced Heat Transfer Proceedings of Enhanced Heat Transfer Conference Brighton 1994
- Steinke , M.E. and Kandlikar , S.G. Review of Single Phase Heat Transfer Enhancement Technique for Application in Microchannels, Minichannels, and Microdevices Heat and Technology 22 3 11 2004
- Shah , R.K. and Sekulic , D.P. Fundamentals of Heat Exchanger Design NJ Wiley 2003 97 142
- Rohsenow , W.M. , Hartnet , J.P. , and Cho , Y. Handbook of Heat Transfer 3 New York McGraw Hill 17.35
- Khan , M.G. and Fartaj , A. A Review on Microchannel Heat Exchangers and Potential Applications Int. J. Energy Res. 35 553 582 2011
- Shah , R.K. Compact Heat Exchanger Technology and Applications Heat Exchanger Engineering, Volume 2: Compact Heat Exchangers: Techniques of Size Reduction Foumaeny , E.A. Heggs , P.J. , London Elis Horwood 1991
- Luo , L. , Fan , Y. , and Tondeur , D. Heat Exchanger: From Micro- to Multi-Scale Design Optimization International Journal of Energy Research 30 1266 1274 2007
- Conlon , B. , Barth , M. , Hua , C. , Lyons , C. et al. Development of Hybrid-Electric Propulsion System for 2016 Chevrolet Malibu SAE Int. J. Alt. Power. 5 2 259 271 2016 10.4271/2016-01-1169
- Murata , T. , Nakagawa , T. , Nishino , H. , and Matsuura , K. Efficiency Improvement in Exhaust Heat Recirculation System SAE Technical Paper 2016-01-0184 2016 10.4271/2016-01-0184
- Chiou , J.P. Compact Heat Exchangers - History, Tehnological Adanvement and Mechanical Design Problems the Winter Annual Meeting of the American Society of Engineers Chicago 1980
- Shaw , R.K. , McDonald , C.F. , and Howard , C.P. The 24th Annual International Gas Turbine Conference and First Solar Energy Conference San Diego 1979 117 120
- Shah , R.K. and London , A.L. Laminar Flow Forced Convection in Ducts Advances in Heat Transfer Supp. 1 212 1978