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Three-dimensional numerical simulations using FLUENT were performed to model the airflow over the supermileage vehicle. The purpose of the study was to design the shape of the body shell of the vehicle, powered from a self-developed electronic fuel injected 50 cc four stroke engine, to achieve low drag. The methodology focuses on an inside-out approach of optimization of body shape through computation of aerodynamic forces on a low mass vehicle. The experimental measurements were carried out to validate the results obtained from the computational model using a 1:5 scale model of the vehicle body shell in a low speed wind tunnel. Numerical solutions of pressure distribution, drag and down force are reported and compared with experimental data. The results shows a considerable reduction in drag and negative lift in the computational model, leading to improved fuel economy in comparison to Supermileage 2005 vehicle's design.

Lot of waste heat in the temperature range 350-400°C is available from I.C. engine exhaust. The same can be utilized for the operation of a triple effect absorption system which requires heat from a high temperature heat source. In this paper, the energy and exergy analysis of series flow triple effect water-lithium bromide absorption systems is presented assuming engine exhaust as a heat source. A computational model has been developed for the parametric investigation of the system. The analysis involves the determination of effects of generator and absorber temperatures on the energetic and exergetic performance of the system. The performance parameters computed are coefficient of performance, exergetic efficiency and the cooling capacity.