Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Design and Performance Evaluation of Dimpled EGR Cooler

딤플형 EGR 냉각기의 설계 및 성능평가

  • Seo, Young-Ho (Dept. of Aerospace Engineering, Pusan Nat'l Univ.) ;
  • Lee, Hyun-Min (Dept. of Aerospace Engineering, Pusan Nat'l Univ.) ;
  • Heo, Seong-Chan (Dept. of Aerospace Engineering, Pusan Nat'l Univ.) ;
  • Ku, Tae-Wan (Dept. of Aerospace Engineering, Pusan Nat'l Univ.) ;
  • Song, Woo-Jin (Institute for Research & Industry Cooperation, Pusan Nat'l Univ.) ;
  • Kang, Beom-Soo (Dept. of Aerospace Engineering, Pusan Nat'l Univ.) ;
  • Kim, Jeong (Dept. of Aerospace Engineering, Pusan Nat'l Univ.)
  • 서영호 (부산대학교 항공우주공학과) ;
  • 이현민 (부산대학교 항공우주공학과) ;
  • 허성찬 (부산대학교 항공우주공학과) ;
  • 구태완 (부산대학교 항공우주공학과) ;
  • 송우진 (부산대학교 부품소재산학협력연구소) ;
  • 강범수 (부산대학교 항공우주공학과) ;
  • 김정 (부산대학교 항공우주공학과)
  • Published : 2010.03.01
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Abstract

A conventional EGR cooler, which is used in an EGR system of an automobile diesel engine, has a low heat-exchange efficiency. To maximize the heat transfer between the exhaust gas and coolant, dimples are formed on the surface of heat exchange tubes. When designing the dimpled EGR cooler, the net heat transfer areas in the conventional and dimpled tube-type EGR coolers are compared. Structural integrity evaluations are also performed by combining finite element analysis with a homogenization method. Subsequently, the process of manufacturing the dimpled tube, i.e., the formation of dimples, edge bending, center v-notch bending, compression, and plasma welding, is established and carried out. Thus, the dimpled EGR cooler is developed, and its performance is verified.

본 논문은 자동차 디젤엔진의 EGR 시스템에 사용되는 EGR 냉각기의 열교환 효율에 관한 것으로 배기가스의 냉각수 사이의 열교환을 촉진시키기 위한 방법으로 딤플형 EGR 냉각기를 설계 및 그 성능을 평가하였다. 개발초기 단계에서 딤플형 EGR 냉각기의 성능을 평가하기 위하여 기존 스파이럴 타입의 EGR 냉각기와 딤플형 EGR 냉각기의 전열면적을 비교하였으며, 균질화 기법을 이용한 유한요소해석을 통하여 딤플형 EGR 냉각기의 구조 건전성을 평가하였다. 또한, 딤플형 열교환 튜브의 생산공정-딤플성형, edge bending, center v-notch bending, 압착, 플라즈마 용접-을 체계화하였다. 최종적으로 본 연구를 통하여 딤플형 EGR 냉각기를 개발하였으며, 그 성능을 검증하였다.

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References

  1. Seo, Y. H., Heo, S. C., Ku, T. W., Song, W. J., Kim, J. and Kang, B. S., 2008, “Study on Heat Exchanger Efficiency of EGR Cooler with Dimpled Rectangular Tube Shape for Application of Diesel Engine,” Trans. of the KSME(B), Vol. 32, No. 10, pp. 769-775.
  2. Lee, H. M., Heo, S. C., Ku, T. W., Kang, B. S. and Kim, J., 2009, “Finite Element Analysis and Validation for Dimpled Tube Type Intercooler Using Homogenization Method,” Trans. of the KSME(A), Vol. 33, No. 2, pp. 153-161. https://doi.org/10.3795/KSME-A.2009.33.2.153
  3. Seo, Y. H., Heo, S. C., Kwon, Y. S., Ku, T. W., Kim, J. and Kang, B. S., 2008, “A Study on Thermal and Modal Characteristics for EGR System with Dimpled Rectangular Tube,” Trans. of the KSPE, Vol. 25, No. 3, pp. 115-125.
  4. Cheng, C. H., Cheung, C. S., Chan, T. L., Lee, S. C. and Yao, C. D, 2008, “Experimental Investigation on the Performance, Gaseous and Particulate Emissions of a Methanol Fumigated Diesel Engine,” Sci. Total Environ., Vol. 389, pp. 115-124. https://doi.org/10.1016/j.scitotenv.2007.08.041
  5. Abu-Hamdeh, N. H., 2003, “Effect of Cooling the Recirculated Exhaust Gases on Diesel Engine Emissions, Energy Conv. Manag., Vol. 44, pp. 3113-3124. https://doi.org/10.1016/S0196-8904(03)00077-3
  6. Bajpai, S., Sahoo, P. K. and Das, L. M., 2009, “Feasibility of Blending Karanja Vegetable Oil in Petro-diesel and Utilization in a Direct Injection Diesel Engine,” Fuel, Vol. 88, pp. 705-711. https://doi.org/10.1016/j.fuel.2008.09.011
  7. Karabektas, M., 2009, “The Effects of Turbocharger on the Performance and Exhaust Emissions of a Diesel Engine Fuelled with Biodiesel,” Renew. Energy, Vol. 34, pp. 989-993. https://doi.org/10.1016/j.renene.2008.08.010
  8. Zheng, M., Reader, G. and Gary Hawley, J., 2004, “Diesel Engine Exhaust Gas Recirculation A Review on Advanced and Novel Concepts,” Energy Conv. Manag., Vol. 45, pp. 883-900. https://doi.org/10.1016/S0196-8904(03)00194-8
  9. Maiboom, A., Tauzia, X. and Hetet, J., 2008, “Experimental Study of Various Effects of Exhaust Gas Recirculation (EGR) on Combustion and Emissions of an Automotive Direct Injection Diesel Engine,” Energy, Vol. 33, pp. 22-34. https://doi.org/10.1016/j.energy.2007.08.010
  10. Park, S. K., Kim, J., Chang, Y. C. and Kang, B. S., 2001, “Analysis of the Deformation of a Perforated Sheet under Thermal and Tension Load Using Finite Element Method, J. Mater. Process. Technol., Vol. 113, pp. 761-765. https://doi.org/10.1016/S0924-0136(01)00696-3
  11. Huyse, L. and Maes, M. A., 2001, “Random Field Modeling of Elastic Properties Using Homogenization, J .Eng. Mech., Vol. 127, pp. 27-36. https://doi.org/10.1061/(ASCE)0733-9399(2001)127:1(27)
  12. Sakata, S., Ashida, F., Kojima, T. and Zako, M., 2008, “Three-Dimensional Stochastic Analysis Using a Perturbation Based Homogenization Method for Elastic Properties of Composite Material Considering Microscopic Uncertainty, Int. J. SolidsStruct., Vol. 45, pp. 894-907. https://doi.org/10.1016/j.ijsolstr.2007.09.008
  13. Heo, S. C., Seo, Y. H., Ku, T. W., Song, W. J., Kim, J. and Kang, B. S., 2007, “Finite Element Analysis and Formability Evaluation for Dimple Forming with Thin Sheet Metal,” Trans. Mater. Process., Vol. 16, No. 8, pp. 621-628. https://doi.org/10.5228/KSPP.2007.16.8.621