Autors: Milkov N., Punov, P. B., Evtimov T., Descombes G., Podevin P.
Title: Energy and exergy analysis of an automotive direct injection diesel engine
Keywords: energy, exergy, internal combustion engine, numerical simula

Abstract: The article presents a numerical analysis of energy balance of an automotive diesel engine and exergy analysis of exhaust gas and cooling systems. A model of the engine was built in advanced simulation code AVL Boost. In order to validate the model a comparison between estimated and real engine effective power was conducted at full load. Energy balance revealed a maximum engine efficiency of 42.1% at full load and 2000rpm. The highest quantity of lost energy contains the exhaust gas. The maximum estimated exhaust gas enthalpy is 108kW at 4000rpm. At the same operating point the cooling enthalpy is twice lower – 55kW. At the engine speed lower than 2000rpm the lost energy in exhaust gas and cooling system has the same quantity. The exergy analysis revealed that waste heat recovery potential in exhaust gas is much higher than cooling system. The results obtained in this study will be further used in a Rankine-Hirn waste heat recovery system development.

References

  1. R. Daccord, J.Melis, T.Kientz, A. Dermedru, R. Pireyre, N. Brisseau and E. Fonteneau, Exhaust Heat Recovery with Rankine pistone expander, ICE Powertrain Electrification & Energy Recovery, Rueil-Malmaison, 2013, France
  2. V. Dolz, R. Novella, A. García, J. Sánchez, HD Diesel engine equipped with a bottoming Rankine cycle as a waste heat recovery system. Part 1: Study and analysis of the waste heat energy, Appl. Therm. Eng., 2012, 36, 269-278.
  3. J.R. Serrano, V. Dolz, R. Novella, A. García, HD Diesel engine equipped with a bottoming Rankine cycle as a waste heat recovery system. Part 2: Evaluation of alternative solutions, Appl. Therm. Eng., 2012, 36, 279-287.
  4. P. Leduc and P. Smague, Rankine System for Heat Recovery: an Interesting Way to Reduce Fuel Consumption, ICE Powertrain Electrification & Energy Recovery, Rueil-Malmaison, 2013, France.
  5. A. Boretti, Recovery of exhaust and coolant heat with R245fa organic Rankine cycles in a hybrid passenger car with a naturally aspirated gasoline engine, Appl. Therm. Eng., 2012, 36, 73-77.
  6. P. Mago, L. Chamra, Exergy analysis of a combined engine-organic Rankine cycle configuration, Part A Journal of Power and Energy 2008, 222(12):761–70.
  7. E. Barrieu, J. Hergott, A. Rossi, Power from Wasted Heat: Challenges and Opportunities of Rankine Based Systems for Passenger Vehicles, Rueil-Malmaison, 2013, France.
  8. Yang, K.; Zhang, H.; Song, S.; Yang, F.; Liu, H.; Zhao, G.; Zhang, J.; Yao, B. Effects of Degree of Superheat on the Running Performance of an Organic Rankine Cycle (ORC) Waste Heat Recovery System for Diesel Engines under Various Operating Conditions. Energies 2014, 7, 2123-2145.
  9. M. He, X. Zhang, K. Zeng, K. Gao, A combined thermodynamic cycle used for waste heat recovery of internal combustion engine, China, 2011.
  10. P. Punov, S. Lacour, C. Perilhon, P. Podevin, Possibilities of waste heat recovery on tractor engines, Proceedings of Scientific conference BulTrans-2013, Sofia Bulgaria, 2013, 7-15.

Issue

Scientific Conference BulTrans-2014, pp. 149-154, 2014, Bulgaria, ISSN 1313-955X

Full text of the publication

Вид: публикация в национален форум с межд. уч., публикация в реферирано издание