In this study, statistical analysis of a long term meteorological data of 10 years have been presented to reveal the potential of wind power as a source of energy generation in the capital of Chad, N’Djamena. The recent ten-year period wind data were collected from the Hassan Djamous International Airport at N’Djamena. The wind characteristics and wind energy potential were analyzed using Weibull distribution function. The results show that the values of the shape parameter k, and scale parameter c, varied over a wide range. The annual highest values of the Weibull shape parameter k, and scale parameter c, were 1.59 and 4.12 m/s respectively. It was also found that higher wind speeds occurred during dry season, i.e. November to July and the lower wind speeds occurred during the wet season, i.e. August to October. The annual average of the most probable wind speed and wind speed carrying maximum energy were respectively 1.86 m/s and 6.48 m/s. Likewise, the wind power density was ranging between 55.96 W/m² and 77.37 W/m² and the corresponding annual energy density values ranged between 490 and 677 kWh/m²/year at 10 m height above ground. The highest wind power potential was found during the summer season which corresponds to the peak demand season of electricity in Chad. However, although the wind potential in this site is promising, it is concluded that it is adequate only for small-scale application.

Aerial crop spraying, also known as crop dusting, is made for aerial application of pesticides or fertilizer. An agricultural aircraft which is converted from an aircraft has been built to combine with the aerial crop spraying for the purpose. In recent years, many studies on the aerial crop spraying were conducted because aerial application is the most economical, large and rapid treatment for the crops. The main objective of this research is to study the airflow of aerial crop spraying system using Computational Fluid Dynamics. This paper is focus on the effect of aircraft speed and nozzle orientation on the distribution of spray droplet at a certain height. Successful and accurate of CFD simulation will improve the quality of spray during the real situation and reduce the spray drift. The spray characteristics and efficiency are determined from the calculated results of CFD. Turbulence Model (k-ɛ Model) is used for the airflow in the fluid domain to achieve a more accurate simulation. Furthermore, spray simulation is done by setting the Flat-fan Atomizer Model of Discrete Phase Model (DPM) at the nozzle exit. The interaction of spray from each flat-fan atomizer can also be observed from the simulation. The evaluation of this study is validation and grid dependency study using field data from industry.

The present work focused on solving two dimensional compressible Euler equation based on cell-cantered finite volume discretization technique with the convective terms appear in the Euler equation were evaluated by using Roe scheme [4]. These methods used for solving the flow past through bump with different setting on their boundary conditions. Six different setting of boundary conditions had been applied; three of them are able to provide a convergent solution, while three others tent to diverge. It is clear the result shows that boundary condition plays an important role in determining the flow solution.

New inventions is relating to the idea of mounting a wind turbine for power generating system in vehicles. This study will investigate on the existing energy conversion and storage systems used in standard vehicle's power system. This study involves with a proposed design of a vehicle's wind turbine system. The energy that has been generated by wind turbine will be stored in the 12 volt battery and will then, be distributed to the entire vehicle for the use of the vehicle components. The optimal design for energy conversion system is created based on the review of the existing energy conversion and storage systems which are used in vehicle's power system. A simulation study using NI Multisim (National Instrument Software) is conducted on the energy conversion and storage system that. The objectives of this study are to convert a mechanical energy from the blade to electrical energy to generate 12V voltage and to store it in a 12 volt battery. The 12V battery voltage will then be supplied to a high voltage system, up to 200V voltage capacity. From the analysis that has been done, the energy from a turbine has the potential to generate power to car system. The wind energy is possible to integrate with other existing and renewable energy. At this stage, the energy gained does not replace the existing one but it can be considered as a new energy source in the future energy development.