Assessment of solar and wind energy resources in Ethiopia. II. Wind energy

Mulugetta, Yacob; Drake, Frances

doi:10.1016/s0038-092x(96)00074-6

Cited by 46 publications

(19 citation statements)

References 5 publications

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“…have high resource potential (Mulugeta and Drake, 1996;SWERA, 2007;Hydrochina, 2012). ISSN: 2220-184X The highlands of the Northern part near or along the escarpment of the rift valley are considered to be the areas with high potential for wind energy utilization.…”

Section: Recent Wind Energy Resource Studies Indicate That the Northementioning

confidence: 99%

Performance of Wind Pump Prototype

Kahsay¹,

Kiros²,

Abdelkadir³

et al. 2015

mejs

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A wind pump prototype with 3.6 m rotor diameter, 19 m hub height above ground and 0.22 mm reciprocating pump stroke has been developed at the Department of Mechanical Engineering, Mekelle University. The prototype was designed and manufactured locally. Theoretical model based on combined efficiency of the rotor and the reciprocating pump was used to estimate the performance of the wind pump. One year wind speed data collected at 10 m height was extrapolated to the wind pump hub height using wind shear coefficient. The model assumed balanced rotor power and reciprocating pump, hence did not consider the effect of pump size. The theoretical model estimated the average daily discharge to be around 50 m 3 and 30 m 3 at 8 m and 12 m head, respectively. The prototype was tested with the same pump stroke but two different size pumps at two different heads. The pumps were with internal diameter of 55 and 70 mm and the test heads were at 8 and 12 m. Measurement of the flow rate, rotational speed and wind speed were made every 10 minutes during the test period. The data collected were analyzed to find the performance of the wind pump at the two test heads and two pump sizes. The flow rate data was plotted against binned wind speed data to determine the linear fit function. The linear fit function was then used to estimate the flow rate at any wind speed. With the 55 mm pump the measured average daily discharge was 20 and 19 m 3 at 8 m and 12 m head, respectively. With the 70 mm pump the measured average daily discharge was 41 m 3 and 30 m 3 at 8 m and 12 m head, respectively.

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Section: Recent Wind Energy Resource Studies Indicate That the Northementioning

confidence: 99%

Performance of Wind Pump Prototype

Kahsay¹,

Kiros²,

Abdelkadir³

et al. 2015

mejs

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show abstract

“…In order to solve this problem, we applied a method described by Mulugetta and Drake (1996) in which a Weibull distribution is fit to the observed wind speed data that are higher than 0 m/s, while calms are considered separately [9].…”

Section: Producibility Of the Turbinementioning

confidence: 99%

Wind Turbines to Power Telecommunication Systems: A Case Study in Sicily

Messineo¹

2011

TOREJ

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Abstract:The ever increasing problems related to air pollution and the difficulties for power lines to reach inaccessible areas are pushing to find new solutions for powering telecommunications equipments (TLC). The renewable energy systems, although relatively expensive, have the required characteristics. The purpose of this work is to find a solution based on a low power wind turbine to serve a real telecommunication site located near Palermo, the main city of Sicily (Italy).

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“…The total annual solar radiation reaching the territory is of the order of over 200 million ton of oil equivalent (toe)/year, over 12-fold the total annual energy consumption in the region (Mulugetta, 1995). Although there are significant temporal and spatial variations in the distribution of wind energy across Ethiopia, the total wind resource potential still amounts to 42 million toe/year which also exceeds gross energy consumption by about 2.5-fold (Mulugetta and Drake, 1996). Thus, there is ample evidence to indicate that Ethiopia is reasonably well positioned in resource terms and can conceivably move toward energy self-sufficiency given far-sighted investment and strategic planning.…”

Section: Sustainable Energy Within the Ethiopian Contextmentioning

confidence: 99%

Renewable Energy Technology and Implementation Mechanisms for Ethiopia

Mulugetta

2007

Energy Sources, Part B: Economics, Planning, and Policy

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The importance of providing modern energy services to rural areas cannot be overemphasized if the country is in a position to meet its Millennium Development Goals. This paper argues that the country has missed scores of opportunities in the past decades to grapple with its current energy predicament as it squandered resources on urban biased development program. The vision of linking highly dispersed rural communities to the grid has all but failed and the realization has now set in that the country needs to embark on new and imaginative policies that take seriously the centrality of energy to poverty reduction. This includes taking a closer look of what energy resources and technological options are available that would deliver increased access to modern energy services. Renewable energy technologies are central to this equation. This paper reviews the potential for expanding renewable energy use by exploring the country's resource base and the potential strategic options that are available to policy makers.

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Assessment of solar and wind energy resources in Ethiopia. II. Wind energy

Cited by 46 publications

References 5 publications

Performance of Wind Pump Prototype

Performance of Wind Pump Prototype

Wind Turbines to Power Telecommunication Systems: A Case Study in Sicily

Renewable Energy Technology and Implementation Mechanisms for Ethiopia

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