Numerical characterization under uncertainties of a piston expander for exhaust heat recovery on heavy commercial vehicles

1st International Seminar on Non-Ideal Compressible-Fluid Dynamics for Propulsion & Power

物理学;力学

Congedo, P.M.^1 ; Melis, J.^2 ; Daccord, R.^2

INRIA Bordeaux Sud-Ouest, 200 Rue de la Vieille Tour, Talence

33405, France^1

EXOES, 6 Avenue de la Grande Lande, Gradignan

33170, France^2

关键词: Bottoming rankine cycles;    Exhaust heat recovery;    Exhaust temperature;    Heavy commercial vehicle;    Numerical characterization;    Quantities of interests;    Sources of uncertainty;    Uncertainty quantifications;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/821/1/012012/pdf
DOI  :  10.1088/1742-6596/821/1/012012

学科分类：力学，机械学

来源: IOP

【 摘 要 】

While nearly 30 percent of the fuel energy is lost as waste heat in the form of hot exhaust gases, exhaust heat recovery promises one of the biggest fuel economy potential regarding the technologies available in the next decade. Applied to heavy commercial vehicles (HCVs), buses or off road vehicles, a bottoming Rankine Cycle (RC) on exhaust heat shows a great potential in recovering the exhaust gases energy, even for part loads. The objective of this paper is to illustrates the interest in assessing the uncertainty of this kind of systems for getting a robust prediction of the associated numerical model. In particular, the focus here is on the simulation of a piston expander for exhaust heat recovery. Uncertainties associated to the experimental measurements are propagated through the numerical code by means of uncertainty quantification techniques. Several sources of uncertainties are taken into account at the same time, thus yielding various indications concerning the most predominant parameters, and their influence on several quantities of interest, such as the mechanical power, the mass flow and the exhaust temperature.