Transient dynamic modeling and validation of an organic Rankine cycle waste heat recovery system for heavy duty diesel engine applications

Bin Xu, Dhruvang Rathod, Shreyas Kulkarni, Adamu Yebi, Zoran Filipi, Simona Onori and Mark Hoffman

Applied Energy, 2017, vol. 205, issue C, 260-279

Abstract: This paper presents a dynamic organic Rankine cycle waste heat recovery (ORC-WHR) Simulink® model and an engine model for heavy-duty diesel applications. The dynamic, physics-based ORC-WHR system model includes parallel evaporators, flow control valves, a turbine expander, a reservoir, and pumps. The evaporator model contains an enhanced pressure drop model, which calculates pressure drop for each working fluid phase via a linear relation to the axial location inside each phase. The ORC-WHR component models parameters are identified over large range of steady state and transient experimental data, which are collected from an ORC-WHR system on a 13L heavy-duty diesel engine. The component models are integrated into an entire system model and the boundary conditions, inputs and outputs for the individual models are described. A GT-POWER® engine model and its transient validation is presented. The speed and torque profiles of a long-haul, constant speed variable-load heavy-duty cycle are processed through the engine model to produce the exhaust and recirculated exhaust gas transient conditions relevant for the ORC model. The ORC-WHR system then simulated over these highly transient engine conditions. Overall, this paper provides detailed guidelines for ORC-WHR system modeling, model calibration, and component models integration.

Keywords: Waste heat recovery; Organic Rankine cycle; Dynamic finite volume heat exchanger modeling; Heavy duty diesel engine; Transient operation (search for similar items in EconPapers)
Date: 2017
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Citations: View citations in EconPapers (32)

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DOI: 10.1016/j.apenergy.2017.07.038

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