Two-phase plate-fin heat exchanger modeling for waste heat recovery systems in diesel engines

Two-phase plate-fin heat exchanger modeling for waste heat recovery systems in diesel engines

Feru, E.
de Jager, B.
Willems, F.
Steinbuch, M.

2014

This paper presents the modeling and model validation for a modular two-phase heat exchanger that recovers energy in heavy-duty diesel engines. The model is developed for temperature and vapor quality prediction and for control design of the waste heat recovery system. In the studied waste heat recovery system, energy is recovered from both the exhaust gas recirculation line and the main exhaust line. Due to the similar design of these two heat exchangers, only the exhaust gas recirculation heat exchanger model is presented in this paper. Based on mass and energy conservation principles, the model describes the dynamics of two-phase fluid flow. Compared to other studies, the model is able to capture multiple phase transitions along the fluid flow by combining finite difference approach with moving boundary approaches. The developed model has low computational complexity, which makes it suitable for control design and real-time implementation.To validate the model, experiments are performed on a state-of-the-art Euro-VI heavy-duty diesel engine equipped with the waste heat recovery system. Simulation results show good accuracy, over the complete engine operating range, with average error below 4%. This is demonstrated on transitions between stationary operating points and on a dynamic response to a standard world harmonized transient cycle for both cold-start and hot-start conditions. cop. 2014 Elsevier Ltd.

Fluid Mechanics Chemistry & Energetics
PT - Power Trains
TS - Technical Sciences
Energy
Mobility
Diesel engine
Dynamic model
Heat exchanger
Waste heat recovery
Rankine cycle

http://resolver.tudelft.nl/uuid:62b82b98-79d8-4c8d-a346-19e24295bef3

https://doi.org/10.1016/j.apenergy.2014.07.073

513460

Elsevier Ltd

0306-2619

Applied Energy, 133, 183-196

article