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Session: Session 5D: Heat Exchangers (1)
Session starts: Tuesday 10 September, 16:00
Presentation starts: 16:40
Room: Kallirhoe

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Tianyu Chen (State Key Laboratory of Engines, Tianjin University)
Gequn Shu (State Key Laboratory of Engines, Tianjin University)
Hua Tian (State Key Laboratory of Engines, Tianjin University)
Xiaonan Ma (State Key Laboratory of Engines, Tianjin University)
Tingting Zhao (State Key Laboratory of Engines, Tianjin University)
Hongfei Zhang (State Key Laboratory of Engines, Tianjin University)
Zhao Zhang (State Key Laboratory of Engines, Tianjin University)

Abstract:
Heat exchanger is an important component in ORC waste heat recovery systems (WHRs), and shell and tube heat exchanger is one of the most common heat exchangers. Compared with traditional metal baffle heat exchanger, the heat transfer area of metal-foam baffle heat exchanger (MF-STHE) is enhanced due to the geometry of metal-foam baffles, which results in a significantly increase in heat transfer performance. Properly designed segmental metal foam baffles can reduce pressure loss and enhance heat transfer in MF-STHE. In present investigations, a 3D numerical model of an exhaust heat exchanger using metal-foam segmental baffles is established to optimize its performance. Firstly, the vector distribution is analyzed. Then, some MF-STHE models with various porosity and pore density are simulated under same mass flow rate (1 kg/s) for parametric study. The area goodness factor j/f1/2 is considered as one evaluation factor to reveal the comprehensive performance of different MF-STHEs. The results show that the comprehensive performance of the MF-STHE with ε = 0.71 and PPI = 20 is the optimum one in all MF-STHEs considered in this paper.