Experimental Investigation of Triple Tube Heat Exchanger for Waste Heat Recovery from IC Engine Exhaust Gas

The study of this project communicates an experimental investigation on single cylinder diesel engine exhaust gas heat recovery using a triple concentric tube heat exchanger. The energy available in the exit stream of many energy conversion devices goes as waste, it is not utilized properly. In the present work, the triple tube heat exchanger consist of three tube in various diameters are connected to concentric method. Hot gas and cold fluids are enters in opposite direction. It is also observed that, the fluid counter flow pattern gave better performance compared to other flow pattern types. Hot gas flow in the intermediate tube and cold fluid flow in both inner and outer tubes. It is found that, while increasing the load and speed, the heat transfer rate of the heat exchanger increased. These fluids are regulated as turbulent flow in all inside of the tubes. This type flow is to increase the effectiveness of heat transfer rate with compact size. This arrangement is especially used to reduce the distance of tube length and to increase the heat transfer rate. The performance parameter pertaining to the heat exchanger such as amount of heat recovered, heat lost and energy saved are evaluated, electrical energy saved also reported.