biofuels are playing important role in recent decades as substitutes for petro diesel. biodiesel derived from vegetable oils are found to give comparable performance and emission characteristics. in this paper a comparative study has been done between two fuels combinations i.e. jatropha and castor. the biodiesel was prepared from neat oils and blends of biodiesel (up till 20%) were prepared wi...

The calculating method for fuel consumption (FC) was put forward and calibrated and the characteristics of the fuel consumption on intersections were analyzed based on 18 groups of vehicular operating data which were acquired from the test experiment of a single vehicle along the urban arterial roads in Harbin, China. The results obtained show that 50.36% of the fuel consumption for the test ve...

Petrol powered traffic has replaced domestic heating and industry as the main causes for urban air pollution (Colvile, Hutchinson, Mindell, & Warren, 2001). Automobile combustion engines are responsible for the better part of a city’s CO2 and NOX pollutants. The amount of pollutants emitted by a vehicle largely depends on fuel consumption: the more fuel the vehicle consumes, the higher its emis...

The aim of this study is to optimize performance functions of turbofan engines considering the off-design model of turbofan engine as well as employing multi-objective genetic algorithm. The design variables including high-pressure compressor pressure ratio, low-pressure compressor pressure ratio, fan pressure ratio and bypass ratio are calculated in such a way that the corresponding functions ...

In this paper, the energy diagnostic of tractor performance consists in evaluating (fuel consumption per hectare—dm3 ha?1) for a given agricultural operation and combining it with working capacity, also called productivity (area productivity—ha h?1). One methods solving problem is identification functioning process machine unit. A model unit was developed, considering rear linkage system implem...

In this work, we considered the problem of optimizing crowd during aircraft delays before landing. Having examined statistics, can conclude that there was a constant increase in passenger traffic from 2013 to 2018. But also due growth traffic, percentage flights with is increasing. The most accounted for small "popular" airports (In Ukraine, 75 percent all Boryspil and Zhuliany). Although since...

A systematic methodology is developed for choosing the optimum ratio trajectory of a continuously variable transmission in a passenger vehicle. The optimum CVT ratio schedule is formulated as a constrained optimization problem with maximum fuel economy as the objective function and driveability concerns and physical limitations included as the constraints. The key notion to achieving good drive...

The potential of Palm Methyl Esters (PME) as an alternative fuel for gas turbines is investigated using a swirl burner. The main air flow is preheated to 623 K and a swirling spray flame is established at atmospheric pressure. The spray combustion characteristics of PME are compared to diesel and Jet-A1 fuel under the same burner power output of 6 kW. Investigation of the fuel atomizing charact...

In this work arrival traffic following a continuous descent approach profile into the Hartsfield-Jackson Atlanta International Airport was simulated based on actual recorded traffic data. The fuel burn for the simulated traffic was estimated using the Base of Aircraft Data (BADA) Thrust Specific Fuel Consumption model and compared to a baseline simulation of the as-flown trajectories, where the...