Investigating the Heat Transfer Characteristics of Fin-prolonged Heat Exchanger for Waste Heat Recovery

Waste heat recovery technologies from engine exhaust are promising solutions for increasing energy efficiency, reducing fuel consumption, and decreasing greenhouse gas emissions. Heat exchangers play a crucial role in waste heat recovery from engine exhaust. In this study, a numerical simulation was carried out to investigate the performance of counter shell and tube heat exchanger with and without inner fin geometry. A CFD analysis showed that the addition of inner fins in heat exchanger improved the heat transfer performance of heat exchanger. Further, the use of GO/water nanofluid is effective to reduce the exhaust air temperature and increase the overall effectiveness of heat exchanger.