A Review on Solar Tracking System: A Technique of Solar Power Output Enhancement
Jamilu Ya’u Muhammad,
Mohammed Tajudeen Jimoh,
Ibrahim Baba Kyari,
Mohammed Abdullahi Gele,
Ibrahim Musa
Issue:
Volume 4, Issue 1, March 2019
Pages:
1-11
Received:
23 November 2018
Accepted:
17 December 2018
Published:
31 January 2019
Abstract: The renewable energy is a source of energy that does not deplete with time, because of this most of the research focused on this source of energy. Solar energy is among the renewable energy that is free in nature and clean from pollution, but harnessing this energy has limitation due to some environmental conditions. To solve this problem, solar tracking is used. This paper intended to review different solar tracking system that increases the solar power output. The result revealed the solar system with tracking is more efficient compared to that fixed solar system. Furthermore, dual axis tracking system is also more efficient than single axis tracking system due to the fact that dual axis tracking system have ability to track the solar irradiant on both axes. Finally, it is not recommended to use solar trackers with small PV arrays because of the energy consumption of the driving systems, which vary from 2% to 3% of the energy increase delivered by the solar trackers.
Abstract: The renewable energy is a source of energy that does not deplete with time, because of this most of the research focused on this source of energy. Solar energy is among the renewable energy that is free in nature and clean from pollution, but harnessing this energy has limitation due to some environmental conditions. To solve this problem, solar tr...
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Nashe Dam Fail and Risk Analysis
Motuma Shiferaw Regasa,
Asie Kemal Jabir
Issue:
Volume 4, Issue 1, March 2019
Pages:
12-27
Received:
19 December 2018
Accepted:
25 January 2019
Published:
14 March 2019
Abstract: Nashe earth fill dam was constructed for the aim multi-purpose use (hydroelectric power and irrigation). While the construction of this dam many peoples around Dam were immigrated from their residential to another places including to the town. This research focused on the dam fail analysis by considering overtopping and piping failure mode. The input data were collected from Min. of Water and Energy, Federal Democratic Republic of Ethiopia (FDRE). The dam breach parameters were determined by applying the principle with Von Thun and Gillette. In dam break analysis the first step is model setup by using three dimensions (x, y and Z) of the downstream. By applying overtopping model, the peak discharge 8761.23m3/sec was obtained, which was more than 7.33 times the probable maximum flood and by applying piping mode, the peak discharge was obtained is 8620.85 m3/sec which was more than 7.21 times the probable maximum food at the nearby location of the dam. This indicates that, the peak outflow development during raining season was greater than inflow discharge flood (IDF) used as upper boundary condition for breach parameters. So it was summarized that high peak outflow and risk were developed to downstream by overtopping mode as compare by piping mode during occurrence of dam breach. As from the sensitivity analysis it was concluded, the effect of breach time on discharge is more sounded than the water level increase. This Dam Break modeling results obtained by studies could be used as flood mappings to assist the societies/communities for future planning developments in the flood prone areas/zones in advance.
Abstract: Nashe earth fill dam was constructed for the aim multi-purpose use (hydroelectric power and irrigation). While the construction of this dam many peoples around Dam were immigrated from their residential to another places including to the town. This research focused on the dam fail analysis by considering overtopping and piping failure mode. The inp...
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