Papers by Itoje Harrison John
Onoroh Francis, Chukuneke Jeremiah Lekwuwa, Itoje Harrison John
Energy is a social and economic necessity of any country. These energy services are essential for... more Energy is a social and economic necessity of any country. These energy services are essential for economic growth and improved living standards for the increasing population. Nigeria generates a lot of residues from the oil palm industries and these residues can be used as an alternative energy source. This paper presents a laboratory analyses carried out on oil palm fruit residues, particularly Empty fruit bunch EFB, Palm kernel shell PKS, and Palm kernel fibre PK. Moisture content and Calorific value of the residues were determined for energy utilisation. The moisture content for the palm kernel shell is 6%, fibre is 14% and empty fruit bunch is 29%. The calorific value of the palm kernel shell is 23,604.71kJ/kg; fibre is 14,511.96kJ/kg and empty fruit bunch is 17,854.807kJ/kg. From the result, oil palm residues could serve as an alternative energy source that could significantly and sustainably contribute to the Nigeria energy mix.
Waterpumping Windmills (Unpublished doctoral thesis).
Small Wind and Hydrokinetic Turbines, 2021
Journal of Physics: Conference Series, 2020
Windmills for water pumping typically operate at low speed and high torque owing to their multi-b... more Windmills for water pumping typically operate at low speed and high torque owing to their multi-bladed nature. This, however, complicates the rotor aerodynamic behavior due to the mutual interaction between adjacent blades and low Reynolds number, Re, operation. While studies on their aerodynamic performance indicate that increasing blade number, N, and airfoil type are critical analysis and design parameters, its low Re behavior with cambered airfoils appears complicated and is still poorly understood. Accordingly, the performance of a windmill model of diameter 0.68 m with 3 ≤ N ≤ 24 identical blades was investigated in two open jet wind tunnels, with different test section sizes: one with high blockage of 36.3 % and the other with a negligible blockage of 4.5 %, for comparison with Blade Element Theory (BET) predictions of thrust, torque, and power. It was found that BET is accurate except at low tip speed ratios, λ where it under-predicts the torque primarily because of the high...
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Papers by Itoje Harrison John