A study of the fouling characteristics of EGR coolers in diesel engines
详细信息 查看全文
- 作者：Joon Lee (1)
Kyoungdoug Min (2) - 关键词：EGR cooler ; Fouling ; Particulate matter (PM) ; Heat exchange efficiency ; Nitrogen oxides (NOx)
- 刊名：Journal of Mechanical Science and Technology
- 出版年：2014
- 出版时间：August 2014
- 年：2014
- 卷：28
- 期：8
- 页码：3395-3401
- 全文大小：1,898 KB
- 参考文献：1. T.Q. Vinh, S. Watanabe, T. Furuhata and M. Arai, Fundamental study of NOx removal from diesel exhaust gas by dielectric barrier discharge reactor, / Journal of Mechanical Science and Technology, 26 (6) (2012) 1921鈥?928. CrossRef
2. Y.H. Sung, G.S. Jung and M.T. Lim, Delay of ignition in early direct-injected PCCI engine combustion using fuelevaporative cooling and cooled EGR, / Journal of Mechanical Science and Technology, 25 (6) (2011) 1409鈥?414. CrossRef
3. L. Chanary, H. Angstorm, L Anderrson, B. Palm and L. Ostling, CFD optimization of an EGR cooler for heavy duty diesel engine, / SAE 2001-01-1755 (2001).
4. J.W. Lee, K.E. Hong, S.M. Choi, S.E. Yu, H.M. Choi and K.D. Min, Comparison of the effects of multiple injection strategy on the emissions between moderate and heavy EGR rate conditions: part 1-pilot injections, / Journal of Mechanical Science and Technology, 27 (4) (2013) 1135鈥?141. CrossRef
5. H.M. Choi, J.W. Lee, K.E. Hong, S.G. Lee, S.M. Choi, S. E. Yu and K.D. Min, Comparison of the effects of multiple injection strategy on the emissions between moderate and heavy EGR rate conditions: part 2-pilot injections, / Journal of Mechanical Science and Technology, 27 (7) (2013) 2217. 2223. CrossRef
6. J.W. Lee, S.M. Choi, S.H. Shin, H.M. Choi and K.D. Min, Experimental analysis of emission reduction by the split injection strategy using close post injection with a double-row nozzle in heavy EGR conditions, / Journal of Mechanical Science and Technology, 26 (4) (2012) 1265鈥?274. CrossRef
7. C.S. Sluder, J. Storey, S. Lewes, D. Styles, J. Giuliano and J. Hoard, Hydrocarbons and particulate matter in EGR cooler deposits: Effects of gas flow rate, coolant temperature, and oxidation catalyst, / SAE 2008-01-2467 (2008).
8. R. Zhang, F. Charles, D. Ewing, J.S. Chang and J.S. Cotton, Effect of diesel soot deposition on the performance of exhaust gas recirculation cooling devices, / SAE 2004-01-0122 (2004). CrossRef
9. J.W. Girard, L.D. Gratz, J.H. Johnson, S.T. Bagley and D. G. Leddy, A study of the character and deposition rates of sulfur species in the EGR cooling system of a heavy-duty diesel engine, / SAE 1999-01-3566 (1999). CrossRef
10. J. Hoard, M. Abarham, D. Styles, J.M. Giuliano, C.S. Sluder and John M.E. Storey, Diesel EGR cooler fouling. / SAE 2008-01-2475 (2008). CrossRef
11. S.M. Min, D.Y. Chung, K.S. Hong, K.S. Lee, S.H. Song and K.M. Chun, Evaluation of SOF effect on EGR cooler fouling in light duty diesel engine, / Annual Conference of KSAE (2010) 2010.B0024.
12. K.S. Hong, J.S. Park and K.S. Lee, Experimental evaluationof SOF effects on EGR cooler fouling under various flow conditions, / International Journal of Automotive Technology, 12 (6) (2011) 813鈥?20. CrossRef
13. S.K. Sung, S.H. Suh and D.W. Kim, Characteristics of cooling water fouling in a heat exchange system, / Journal of Mechanical Science and Technology, 22 (8) (2008) 1568. 1575. CrossRef
14. C.H. Sohn, Heat transfer analysis of EGR cooler with different tube shape, / Transaction of KSAE, 1 (5) (2007) 112鈥?17.
15. H.S. Heo, J.P. Won and K.S. park, Evaluation of thermal fluids characteristics for EGR cooler with spiral type, / Transaction of KSAE, 11 (6) (2003) 44鈥?0. - 作者单位：Joon Lee (1)
Kyoungdoug Min (2)
1. School of Mechanical Engineering, Hoseo University, 165, Sechul-ri, Baebang-myun, Asan-si, 336-795, Korea
2. School of Mechanical and Aerospace Engineering, Seoul National University, Gwanak-Gu, Seoul, 151-744, Korea - ISSN：1976-3824
文摘
Diesel emission regulations have recently become more severe. An important goal in diesel engine research is the development of methods to reduce the emissions of NOx and PM (particulate matter). Cooled EGR (exhaust gas recirculation) system has been widely used to reduce the NOx and PM emissions of light-duty diesel engines. In this study, numerical analyses, rig tests and engine tests were performed to assess how changes in internal shape characteristics can improve the heat exchange efficiencies of EGR coolers. The heat exchange efficiencies of EGR coolers have been numerically and experimentally measured during a fouling process. The results show that the second type of oval EGR cooler tested (oval #2) exhibited better heat exchange efficiency than either the first type of oval EGR cooler was tested (oval #1) or the shell and tube cooler examined. The turbulence generated in exhaust gas flows by the wavy-finned design of the oval EGR coolers facilitated PM desorption that allows these coolers to self-purify. With respect to the two similar oval EGR coolers, the cooler with fin pitch 4 mm has better efficiency than the cooler with fin pitch 6 mm due to differences in the heat transfer areas of these coolers. Both CFD analyses involving extreme conditions of engine operation and engine fouling tests involving conditions experienced during vehicular operation indicate that the two oval coolers differed by less than 4% with respect to both initial heat transfer efficiency and heat transfer efficiency after a 78-hour fouling test.