Abstract
Abstract: This paper presents a dynamic model of an organic Rankine cycle (ORC) for exhaust heat recovery (EHR) in automotive applications. EHR converts the thermal energy of the exhaust gas into mechanical power. Dynamic components like evaporator, condenser, etc. are modeled based on physical conservation laws given as partial differential equations (PDE). The system involves two parallel evaporators coupled via an open t-piece which is handled numerically efficiently by introduction of algebraic constraints. An integral method improves the evaluation of the fluid properties which partly contain discontinuities. They can have negative effects on accuracy and simulation performance if evaluated inappropriately. The model is implemented by signal-based programming suitable for simulation in Matlab/Simulink. This enables convenient software-in-the-loop (SIL) engineering since many control unit producers provide rapid prototype programming via Matlab/Simulink. A simplified model is proposed for the increase of robustness and simulation performance or for application of controller design methods. Simulation shows both the entire ORC system compared measurements from a Daimler prototype truck, and comparison between complex and simplified model.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
