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Session: Session 9: Heat exchangers
Session starts: Tuesday 13 October, 08:40
Presentation starts: 09:20
Room: 1B Europe

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Tao Chen ()
Lei Zhang ()
Weilin Zhuge ()
Yangjun Zhang ()

Abstract:
A new Organic Rankine Cycle (ORC) system for vehicle internal combustion engine (ICE) waste heat recovery (WHR) is presented in this paper, which can effectively reduce the influence of exhaust gas fluctuation caused by vehicle driving cycle. An evaporator with heat storage material inside is used in this system to make it possible that the ORC expander working under more stable condition, and the conceptual scheme of the heat-storage ORC system is presented. The dynamic model is established, and a heavy diesel engine exhaust experimental data is used as heat source in the performance simulation. The heat resistance effect and the heat capacity effect are the main effects of heat storage ORC system, and the influence of this two effects are analyzed and discussed, meanwhile, the system designing criteria is presented. Compared with conventional system, the fluctuation of ORC evaporator outlet temperature can be decreased by 50 % and the system overall efficiency can be increased from 6 % to 7 %. Key words: ORC; ICE; heat fluctuation; heat storage material