Rankine Cycle for Waste Heat Recovery of IC Engines
Date Published: 2009-04-20
Paper Number:2009-01-0174
DOI: 10.4271/2009-01-0174
Citation:
Ringler, J., Seifert, M., Guyotot, V., and Hübner, W., "Rankine Cycle for Waste Heat Recovery of IC Engines," SAE Int. J. Engines 2(1):67-76, 2009, doi:10.4271/2009-01-0174.
This paper deals with an analysis of the potential of the Rankine cycle as an additional power generation process, which uses the waste heat of a car engine. A review of different heat recovery technologies leads to the identification of the steam process as a favorable solution for automotive applications.
Two basic configurations (exhaust gas only; exhaust gas plus coolant) are selected from numerous illustrated Rankine cycle layouts for a detailed evaluation of heat recovery based on a four-cylinder internal combustion engine (ICE). Furthermore, the impact of different working fluids is studied. A parametric analysis of the efficiency of two selected systems is accomplished with the Dymola simulation tool, followed by a direct comparison between both configurations for different engine technologies and vehicle speeds.
Finally, test bench measurements of the applied engine coupled with a heat recovery device are carried out. It can be demonstrated that waste heat recovery can produce an additional power output of about 10% at typical highway cruising speeds.
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