THERMAL SCIENCE

International Scientific Journal

Thermal Science - Online First

Authors of this Paper

External Links

online first only

CFD simulation of heat transfer performance of exhaust gas recirculation coolers for heavy-duty diesel engines

ABSTRACT
In order to estimate the performance of exhaust gas recirculation coolers two factors were considered: The cooling efficiency and pressure drop. For that, three models of EGR coolers intended to heavy-duty Diesel engines were chosen and studied by numerical simulations. The CFD software FLUENT was used to solve the governing equations. Temperature dependant physical properties of the recycled exhaust gas were incorporated via the "User Defined Functions(UDF)" feature of FLUENT. The inlet temperature of the exhaust gas is set to 523.15 K and the inlet mass flow rate changes from 0.07 up to 0.2 kg/s. The computed performance results were compared to existing experimental measurements. The comparison of the computed results for the three models allowed to distinguish the EGR cooler model consisting of 19 tubes with helical baffles as having the best performance in terms of cooling efficiency and pressure drop.
KEYWORDS
PAPER SUBMITTED: 2016-08-30
PAPER REVISED: 2016-12-14
PAPER ACCEPTED: 2016-12-25
PUBLISHED ONLINE: 2017-01-14
DOI REFERENCE: https://doi.org/10.2298/TSCI160830317H
REFERENCES
  1. J. B. Heywood. Internal Combustion Engine Fundamentals, McGraw-Hill, Inc, 1988.
  2. Zheng, M., et al, Diesel engine exhaust gas recirculation- a review on advanced and novel concept, Energy Conversion and Management, 45 (2004), pp. 883-900
  3. Pierpont, D A., et al, Reducing particulate and NOx using multiple injections and EGR in a D. I. diesel, SAE Technical Paper, 950217, 1995
  4. Charnay, L., et al, CFD Optimization of an EGR Cooler for Heavy-Duty Diesel Engines, SAE Technical Paper, 2001-01-1755, 2001
  5. Park, S.,et al, Heat Exchange Efficiency Characteristics of EGR Cooler with Stack-Type or Shell &Tube-Type, SAE Technical Paper, 2007-01-3446, 2007
  6. Master, B. I., et al, Fouling Mitigation Using Helixchanger Heat Exchangers: Proceedings of the ECI Conference on Heat Exchanger Fouling and Cleaning, Santa Fe, USA, 2003, pp. 317-322
  7. Sunil, S.S., et al, Performance Improvement in Single phase Tubular Heat Exchanger using continuous Helical Baffles, International Journal of engineering Research and Applications, pp. 1141-1149, 2012.
  8. Huang, Y.q., et al, Numerical simulation and optimization design of the EGR cooler in vehicle, Journal of Zhejiang University Science, 9 (2008), pp. 1270-1276
  9. Park, S., et al, Effects of the Internal Shape of EGR Cooler on Heat Exchanger Efficiencies, SAE Technical Paper, 2007-01-1252, 2007
  10. ANSYS Inc. Fluent User Guide and Fluent Theory Guide, version 13.0, 2010.
  11. Yaws, C.L., Transport Properties of Chemicals and Hydrocarbons: Viscosity, Thermal Conductivity, and Diffusivity of C1 to C100 Organics and Ac to Zr Inorganics, William Andrew Inc., USA, 2009
  12. Kee, R.J., et al, The CHEMKIN thermodynamic database, Sandia National Laboratories, Technical Report SAND87-8215, 1987, www.detchem.com/mechanisms/04_CH4_H2O_O2_Rh_Thormann2009/td_CH4_H2O_O2_Rh_2009
  13. Asad, U., Zheng, M., Exhaust gas recirculation for advanced diesel combustion cycles, Applied Energy, 123 (2014) , issue C, pages 242-252, 2014
  14. Incropera, F.P., et al, Fundamentals of Heat and Mass Transfer, John Wiley & Sons, Inc, USA, 2007.
  15. Purandarea, P.S., et al, Experimental investigation on heat transfer and pressure drop of conical coil heat exchanger with parameters tube diameter, fluid flow rates and cone angle. Thermal science, First Issue 00, Pages 137-137, 2014.
  16. Karuppa raj, R.T., Ganne, S., Shell side numerical analysis of a shell and tube heat exchanger considering the effects of baffle inclination angle on fluid flow. Thermal science, Vol. 16, No. 4, pp. 1165-1174, 2012.
  17. Kalaiselvam, S., et al, Study of heat transfer and pressure drop characteristics of air heat exchanger using PCM for free cooling applications. Thermal science, Vol. 20, No. 5, pp. 1543-1554, 2016.
  18. Zimparov, V.D., et al, Performance evaluation of tube-in-tube heat exchangers with heat transfer enhancement in the annulus. Thermal science, Vol. 10, 0354-9836, issue 1, pages 45-56, 2006.