Finding Potential Sites for Small-Scale Hydro Power in Uganda: a ...

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By using a smaller area it is possible to visualize more details e.g. roads and administrativeunits. A shaded relief image of elevation set as background emphasizes the geographicalsurroundings of the potential sites, which facilitate the understanding of their position inreality.5.2.4 Evaluation of Potential SitesWhen performing the evaluation our goal was to evaluate 25 sites, but we were only ableto visit 14 of them. All sites are marked as red dots in Figure 5.12 below. The result ofour evaluation showed that all visited sites met the requirements of 20-meter head over adistance of 100 meters and showed noticeable traces from streams and rivers. Howeverthere were only three sites containing a permanent flow, which strongly contradict theinput data, where all these rivers should be permanent. The sites where a permanent flowexist are sites 2, 19 and 25 in Figure 5.12Figure 5.12 Evaluation sites in the study area.54
To determine the electrical power potential of site 19, in vicinity of the village Nyambarein Nyamabare parish, the following steps were made:To calculate the electrical power we first need to calculate cross-sectional area, flow andhead. This is done by using equations 4.3, 4.4 and 4.2.o Area:2(0.3 m ⋅ 0.5 m)/2 = 0.075 mo Flow:230.075 m ⋅ (1m/s ⋅ 0.65) = 0.04875 m /sWhere 0.65 is a correction factor for a small slow clear streamo Net head:ο100 m ⋅ sin 15 = 25.9 m25.9 m – 25% = 19.4 mWhere 25 % equals the loss of power due to penstock friction.By using equation 3.1 we then calculated the hydraulic power.o Hydraulic power:19.4 m ⋅ (0.04875 ⋅1000)l/s ⋅ 9.81 = 9283 WAs stated in section 3.1.2, there is a power loss of 35% in the turbine when the hydraulicpower is converted to mechanical power. There is also a loss of power when convertingto electrical power. As in the example in section 3.1.2, we have calculated with agenerator efficiency of 80 %, which gives the site at Nyambare the potential electricalpower of 4.8kW.o Mechanical power:9283 x 0.65 = 6034 Wo Electrical power:6034 x 0.8 = 4827 W or 4.8kWThe same calculations as above have been applied on the sites 2 and 25 to estimate theirelectrical power potential. Site 2 near the village Nyamatembe in Kacherere parish has anelectrical power output of 1.9 kW and site 25 near the village Rusiza in Busengo parish,48.4 kW. Information about all evaluated sites is attached as Appendix 9.5.55
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Seminar series nr 121Finding Potent
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AbstractOver 2 billion people, most
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AcknowledgmentsFirst of all, we wou
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5 Result ..........................
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For the specific case of Uganda, a
Page 17 and 18: 2 Study AreaThe main reason for us
Page 19 and 20: In the 1960’s Uganda was one of t
Page 21 and 22: 2.1.3 TopographyMost of Uganda is s
Page 23: Figure 2.4 The highest volcano in K
Page 26 and 27: e able to manually write the data,
Page 28 and 29: Depending on the appearance of the
Page 30 and 31: o Then the water flows from the for
Page 32 and 33: and generator is 65% and 80% effici
Page 34 and 35: Table 3.2 Capacity and production o
Page 36 and 37: Table 3.5 Small-scale hydropower ca
Page 38 and 39: technology was supplied to an area
Page 40 and 41: component to all of these issues, g
Page 42 and 43: The Rural Electrification project t
Page 44 and 45: The closer the interviewer is to th
Page 46 and 47: Over this area we bought the follow
Page 48 and 49: The primary erosive force determini
Page 50 and 51: There are a set of tolerances used
Page 52 and 53: ivers are seasonal, since the hydro
Page 54 and 55: (a) (b) (c)Figure 4.8 An example sh
Page 56 and 57: 4.2.6 Post Processing of Output Dat
Page 58 and 59: A = ( b ⋅ h)2(4.3)Where A equals
Page 60 and 61: elinquish because of too expensive
Page 62 and 63: The first step when performing the
Page 64 and 65: more obvious in their geographic co
Page 68 and 69: 5.3 Summary of Resultso The general
Page 70 and 71: projects are supposed to be finance
Page 72 and 73: Sinks are a reoccurring problem whe
Page 74 and 75: UTM Zone 36N projection. The study
Page 76 and 77: As described in chapter 3.3.3 all r
Page 78 and 79: and if good financing possibilities
Page 80 and 81: Hutchinson M. F., Dowling T. I., 19
Page 83 and 84: 9 Appendix9.1 Interview: Rural Elec
Page 85 and 86: 9.3 Digital DataAll data layers are
Page 87 and 88: Frame creationThis is made in order
Page 89 and 90: time2=clock;%starts timer on clock
Page 91 and 92: next(1,2)=(y-1);cell_height=(highes
Page 93 and 94: endendif height>=20;%if the accumul
Page 95: Site 16 (147486,78619)Site 20 (1560
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