Autors: Punov, P. B., Evtimov, T., Milkov, N., Descombes, G., Podevin, P.
Title: Impact of Rankine cycle WHR on passenger car engine fuel consumption under various operating conditions
Keywords: Diesel engine, Fuel consumption, Waste heat recovery, Rankine cycle, Passenger car, Simulation

Abstract: This study presents a comprehensive analysis of the effect of a waste heat recovery system using the Rankine cycle on passenger car engine fuel consumption. The engine studied here is a 2.0liter direct injection diesel engine developed for a passenger car. The maximum engine output power is 101kW at 4000rpm. An engine computational model built with the advanced simulation code AVL Boost was used to estimate the engine power and exhaust gas parameters. A physical model of the Rankine cycle was also developed. Based on the model, a computational code was developed in Python (x,y). The working fluid parameters were determined with the open-source platform CoolProp. The Rankine cycle simulation was conducted over the engine operating map with water as the working fluid. It was found that there is a 7.57% decrease in the fuel consumption at the engine operating point corresponding to a car speed of 160km/h and a decrease of 1.5% at the point corresponding to a speed of 130km/h.


  1. Daccord, R., et al. Exhaust Heat Recovery with Rankine piston expander. in ICE Powertrain Electrification & Energy Recovery. 2013. Rueil-Malmaison.
  2. Milkov N., Punov, P. B, Evtimov T., Descombes G., Podevin P., 2014,Scientific Conference BulTrans-2014: Energy and exergy analysis of an automotive direct injection diesel engine, Sozopol, Bulgaria, pp. 149-154
  3. Zhang, H.G., E.H. Wang, and B.Y. Fan, A performance analysis of a novel system of a dual loop bottoming organic Rankine cycle (ORC) with a light-duty diesel engine. Applied Energy, 2013. 102(0): p. 1504-1513.
  4. Taylor, A.M.K.P., Science review of internal combustion engines. Energy Policy, 2008. 36(12): p. 4657-4667.
  5. Abusoglu, A. and M. Kanoglu, Exergetic and thermoeconomic analyses of diesel engine powered cogeneration: Part 2 – Application. Applied Thermal Engineering, 2009. 29(2–3): p. 242-249.
  6. Punov, P., et al. Possibilities of waste heat recovery on tractor engines. in BulTrans'13. 2013. Sofia.
  7. Leduc, P. and P. Smague. Rankine System for Heat Recovery: an Interesting Way to Reduce Fuel Consumption. in ICE Powertrain Electrification & Energy Recovery. 2013. Rueil-Malmaison.
  8. Duparchy, A., et al., Heat Recovery for next Generation of Hybrid Vehicles: Simulation and Design of a Rankine Cycle System. World Electric Vehicle Journal, 2009. 3.
  9. Domingues, A., H. Santos, and M. Costa, Analysis of vehicle exhaust waste heat recovery potential using a Rankine cycle. Energy, 2013. 49(0): p. 71-85.
  10. Katsanos, C.O., D.T. Hountalas, and E.G. Pariotis, Thermodynamic analysis of a Rankine cycle applied on a diesel truck engine using steam and organic medium. Energy Conversion and Management, 2012. 60(0): p. 68-76.
  11. Kölsch, B. and J. Radulovic, Utilisation of diesel engine waste heat by Organic Rankine Cycle. Applied Thermal Engineering, 2015. 78(0): p. 437-448.
  12. Wang, E.H., et al., Parametric analysis of a dual-loop ORC system for waste heat recovery of a diesel engine. Applied Thermal Engineering, 2014. 67(1–2): p. 168-178.
  13. Wenzhi, G., et al., Performance evaluation and experiment system for waste heat recovery of diesel engine. Energy, 2013. 55(0): p. 226-235.
  14. Yang, F., et al., Performance analysis of waste heat recovery with a dual loop organic Rankine cycle (ORC) system for diesel engine under various operating conditions. Energy Conversion and Management, 2014. 80(0): p. 243-255.
  15. Barrieu, E., J. Hergott, and A. Rossi. Power from Wasted Heat: Challenges and Opportunities of Rankine Based Systems for Passenger Vehicles. in ICE Powertrain Electrification & Energy Recovery. 2013. Ruiel-Malmaison.
  16. Boretti, A., Recovery of exhaust and coolant heat with R245fa organic Rankine cycles in a hybrid passenger car with a naturally aspirated gasoline engine. Applied Thermal Engineering, 2012. 36(0): p. 73-77.
  17. Punov, P., et al., Numerical study of the waste heat recovery potential of the exhaust gases from a tractor engine. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 2015.
  18. Horst, T.A., et al., Prediction of dynamic Rankine Cycle waste heat recovery performance and fuel saving potential in passenger car applications considering interactions with vehicles’ energy management. Energy Conversion and Management, 2014. 78(0): p. 438-451.
  20. Woschni, G., A Universally Applicable Equation for the Instantaneous Heat Transfer Coefficient in Internal Combustion Engines. SAE 6700931, 1967.
  21. Genta, G. and L. Morello, The Automotive Chassis: Volume 2: System Design. 2008: Springer.
  22. Millo, F., L. Rolando, and M. Andreata, Numerical Simulation for Vehicle Powertrain Development. Numerical Analysis - Theory and Application. 2011.
  23. Glavatskaya, Y., et al., Reciprocating Expander for an Exhaust Heat Recovery Rankine Cycle for a Passenger Car Application. Energies, 2012. 5(6): p. 1751-1765.
  26. Hountalas, D.T., et al., Improvement of bottoming cycle efficiency and heat rejection for HD truck applications by utilization of EGR and CAC heat. Energy Conversion and Management, 2012. 53(1): p. 19-32.


The 28th international conference on Efficiency, Cost, Optimization, Simulation and Environmental impact of energy systems - ECOS 2015, pp. 1-13, 2015, France,

Copyright ECOS 2015

Full text of the publication

Цитирания (Citation/s):
1. Punov, P., Milkov, N., Danel, Q., Perilhon, C., Podevin, P., Evtimov, T., Optimization of automotive Rankine cycle waste heat recovery under various engine operating condition, (2017), AIP Conference Proceedings, 1814, art. no. 020074 - 2017 - в издания, индексирани в Scopus или Web of Science

Вид: публикация в международен форум, публикация в реферирано издание, индексирана в Scopus