Due to increased traffic and new technologies developed to improve road safety, a new vehicle driving technique is being studied. The vehicles’ platooning driving method has as objective to minimize the aerodynamic drag and therefore the fuel consumption. The aim of this study is to evaluate the distance between platoon traveling vehicles and to propose an optimal travel distance. The CFD evaluation is performed for two categories of vehicles at a given velocity and distance between them for two cases: in the first simulation scenario, a tractor-trailer is represented, followed by a SUV positioned at a given distance from the rear of the vehicle combination; in the second simulation, two tractor-trailers at the same boundary condition as for the first case are simulated. The vehicles models are made by using a CAD modelling environment, respecting the overall dimensions of an existing vehicle. The numerical evaluation of a distance between vehicle models is performed using the CFD method based on the Navier-Stokes equations averaging. The last part of the paper presents the interpretation of CDF simulation results, establishing the recommended travel distance between vehicles and conclusions of this study.
In the last years the price of energy from conventional fuels increased and in the same time the price of agricultural products decreased. The farmer’s interest for energy production from agricultural source increased. For this reason the vegetable waste, the agricultural secondary products, the primary agricultural products like rape or sun flowers, animals manure and not in the last time short rotation crop become possible renewable energy sources for farmers. In this paper is presented the Romania’s potential of main energetic crops and the conversion technology to obtain renewable energy for cover energetic needs in agricultural farms.
In the paper is presented a study regarding the bio-energetic potential of agricultural crops and the evaluation possibilities of agricultural wastes for energetic proposes. In the study is analyzed, from technical and economical point of view, the phases of energy from solid biomass conversion. The authors proposed an agricultural farm for the evaluation of energetic potential of agricultural solid biomass as a fuel.
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