Author : Anurag Shanu 1
Date of Publication :18th May 2017
Abstract: This paper presents a feasibility study of an organic Rankine Cycle (ORC) technology waste heat recovery system for heavy duty trucks. The new features are: I the plant configuration proposed and ii) the feasibility study that covers the entire preliminary plant workflow, including the optimization of the thermodynamic cycle and the preliminary size of the components, and the dynamic modeling and development of a PI control system. The design ORC turbo generator is a fluid with a maximum rating of approximately 5 kW, corresponding to the truck cruise speed and the diesel power generation of 85 km h−1 and 100 kW, respectively. This turbo generator uses hexamethyl isyl disiloxane (MM) as a work-fluid. In terms of dynamic performance, an advanced control system is required due to a higher response time of the ORC unit compared to that of the Diesel engine. In particular, the simulation of a PI-based control system shows that thermal deterioration of the working fluid cannot be avoided if the engine is continuously running at high power levels. The case study reveals the importance of the dynamic performance and control design study already in the early design phase for automotive ORC applications.
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