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A Numerical Study of a Newly Developed of Savonius Wind Turbine Style on Increasing the Performance of Savonius Wind Rotor
Youssef Kassem,
Hüseyin Çamur
Issue:
Volume 3, Issue 6, December 2017
Pages:
115-120
Received:
5 October 2017
Accepted:
19 October 2017
Published:
23 November 2017
Abstract: In the present study, a new model of Savonius wind turbine has been designed to increase the low performance of the Savonius wind rotor, a type of vertical-axis wind rotor, and the effect of wind speed on the static rotor performance has been analyzed numerically using solid-work flow simulation (SWFS). SWFS is based on the Reynolds Averaged Navier-Stokes (RANS) equations with the standard k-ε turbulence model. These equations were solved by a finite volume discretization method. Further, the effects of rotor geometries and end plate on static torque are also discussed. In order to clarify the new designed of the rotor, static torque was measured with various blade sizes and end plate shape. From the study, found that the use of both upper and lower end plats significantly increase the torque by 40% compared with no end plates. Additionally, it was also observed that the torque of rotors increases proportionally to blade size and end plate shapes. Moreover, the results showed that model 2 has produced more torque compared to other models.
Abstract: In the present study, a new model of Savonius wind turbine has been designed to increase the low performance of the Savonius wind rotor, a type of vertical-axis wind rotor, and the effect of wind speed on the static rotor performance has been analyzed numerically using solid-work flow simulation (SWFS). SWFS is based on the Reynolds Averaged Navier...
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Design, Simulation and Stability Analysis of Wind-PV-Diesel Hybrid Power System Using ETAP
Md Saleh Ebn Sharif,
Md Monower Zahid Khan,
Md Moniruzzaman,
Anamika Bose
Issue:
Volume 3, Issue 6, December 2017
Pages:
121-130
Received:
13 October 2017
Accepted:
3 November 2017
Published:
25 November 2017
Abstract: Nowadays, the hybrid power system is getting popular because of its advantage of renewable integration to the traditional power grid. In this paper, a review of the hybrid power system is presented and detailed analysis of steady state & transient stability is performed. For detailed analysis, IEEE 9 bus system has been adopted and modified for this study. The proposed isolated hybrid system consists of the wind turbine, solar PV array, energy storage system, a backup diesel generator and battery bank to study the system analysis. The hybrid wind-solar electric power system was modeled in ETAP software. The variation in power angle of the system after a three-phase fault is studied. The whole system also is studied and simulated for different case studies and combination of some outages to study the impact of disturbance in system stability.
Abstract: Nowadays, the hybrid power system is getting popular because of its advantage of renewable integration to the traditional power grid. In this paper, a review of the hybrid power system is presented and detailed analysis of steady state & transient stability is performed. For detailed analysis, IEEE 9 bus system has been adopted and modified for thi...
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Experimental Determination of Effect of Total Solid (TS) and Volatile Solid (VS) on Biogas Yield
Ejiroghene Kelly Orhorhoro,
Patrick Okechukwu Ebunilo,
Godwin Ejuvwedia Sadjere
Issue:
Volume 3, Issue 6, December 2017
Pages:
131-135
Received:
16 October 2017
Accepted:
3 November 2017
Published:
25 November 2017
Abstract: In this research work, eight different samples of substrates with varying percentage total solid (TS) and volatile solid (VS) were used. The samples which comprises mainly of water hyacinth, waste water (i.e., from ice fish cold room, septic tanks, and abattoir), pig dung, cow dung, corn cobs, potato peels, pineapple peels, rice left over, yam peels, cassava peels, orange peels, sweet potato peels, garri left over, plantain peels, beans waste, banana peels and vegetables, etc., were co-digested. In each of the samples, 10kg of substrates were used and the experiment was conducted within mesophilic temperature range of 36°C-37°C, pH range of 6.9-7.4 and hydraulic retention time (HRT) of thirty-three (33) days. It was observed that the quantity of biogas yield from these substrates increase with increasing percentage volatile solid and decrease with decreasing percentage volatile solid concentration below and above the optimum value of 91.1% (2.88kg) volatile solids which gave the maximum amount of biogas yield for the samples of substrates to be 1.01kg (23.6%), 2.01kg (60.75%), 2.55kg (84.72%), 2.41kg (68.0%), 2.35kg (67.67%), 1.85kg (59.23%), 1.45kg (25.39%). Furthermore, the results obtained reveal that bio-digesters should be run at 10.16% total solids, since optimum cumulative biogas generation is achieved at this %TS concentration.
Abstract: In this research work, eight different samples of substrates with varying percentage total solid (TS) and volatile solid (VS) were used. The samples which comprises mainly of water hyacinth, waste water (i.e., from ice fish cold room, septic tanks, and abattoir), pig dung, cow dung, corn cobs, potato peels, pineapple peels, rice left over, yam peel...
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Conceptual Design of a Fish Oil Extracting Machine
Tanko Bako,
John Okanagba Awulu,
Anebi Joseph Garba
Issue:
Volume 3, Issue 6, December 2017
Pages:
136-145
Received:
15 October 2017
Accepted:
31 October 2017
Published:
5 December 2017
Abstract: Oil is extracted from fish and fish by-products by solvent extraction, wet rendering, dry (steam) rendering and wet pressing methods. The method of rendering commonly used in extracting fish oils employs high temperatures, which increase the susceptibility of the extracted oil to thermal degradation. Solvent extraction is not a recommended option for extraction of food-grade fish oils due to the toxic nature of the extraction chemicals. Also, the equipment used for solvent extraction is complex and expensive. Based on this a motorized horizontal screw type fish oil extracting machine is being designed to solve this problem. This machine takes into consideration the dangers, hazards and risks involved in solvent extraction which will be efficient, productive, environmentally friendly, less laborious, easy to use and ergonomic, easy to assemble and disassemble, and most importantly, cost effective in production, maintenance and repairs. The extracting unit consists of an auger with decreasing pitches and a conical choke at the cake exit. The results of the analysis show that the screw press design is safe and the deformations are negligible when the loads are applied.
Abstract: Oil is extracted from fish and fish by-products by solvent extraction, wet rendering, dry (steam) rendering and wet pressing methods. The method of rendering commonly used in extracting fish oils employs high temperatures, which increase the susceptibility of the extracted oil to thermal degradation. Solvent extraction is not a recommended option f...
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Effects of Di-Ethyl-Ether Addition on the Water-Diesel Emulsion Fuel Combustion Pressures and Pressure Rise Rates
Mohamed Y. E. Selim,
Mamdouh T. Ghannam,
Adel MM Hussien
Issue:
Volume 3, Issue 6, December 2017
Pages:
146-152
Received:
16 October 2017
Accepted:
31 October 2017
Published:
26 December 2017
Abstract: An experimental investigation has been carried out to investigate the effects of adding very low viscosity renewable fuel of Di-Ethyl Ether (DEE) to a 30% water-in-diesel emulsion on the diesel engine combustion characteristics. A research engine of Ricardo E-6 has been used throughout the work and the water-diesel emulsion (W/D emulsion) has been prepared to have four weeks of fuel stability. The W/D emulsion then mixed with the low viscosity additive to reduce the viscosity of the W/D emulsion. Diesel engine combustion pressure and other engine parameters, have been collected by data-acquisition systems and the maximum pressure rise rate has been calculated. It has been found that adding the DEE to the W/D emulsion affected its viscosity and affected the combustion as noticed from the combustion pressures and pressure rise rates. Using an additive like the DEE enables the use of W/D emulsion in diesel engine with high amount of water of 30% with acceptable combustion characteristics.
Abstract: An experimental investigation has been carried out to investigate the effects of adding very low viscosity renewable fuel of Di-Ethyl Ether (DEE) to a 30% water-in-diesel emulsion on the diesel engine combustion characteristics. A research engine of Ricardo E-6 has been used throughout the work and the water-diesel emulsion (W/D emulsion) has been ...
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