By: Eng. Jimmy Collins Omona

Transcription

1 By: Eng. Jimmy Collins Omona M.Sc.Hydro-mechanical Eng. Moscow University Russia. Hydro-mechanical Engineer /Consultant With Hydropower Development Unit UEGCL/MEMD UGANDA

2 Small Hydro power in Uganda Current Projects and Future Prospects.(Focus on the Potential of Hydro Power in the Mount Elgon Region, Uganda)

3 Why Small Hydros The need to provide affordable power to remote communities. The need to provide clean and reliable power to remote areas where: Grid extension is not feasible in the short term High cost of T-Line extension Low consumer demand and density in rural areas Large Hydros require huge investment capital

4 Technically, Small hydros are: Less complex (in equipment sophistication and design) Less demanding/stringent in design specifications, O & M by not very highly qualified personnel Possibility of local fabrication of parts ( Mini, micro &pico)

5 Continued Less impacts on environment due to small structures Less depth of developmental studies Stimulate demand growth enabling future grid connection When grid connected, help improve system reliability and stability Possibility of community ownership

6 On going and just completed IPP Small Hydro Power Plant Projects in Uganda. No Project Name/Location IPP Discharge Qm 3 /s Power (MW) Comments 1 Bugoye Tronde 13 Commissioned Nyagak/West Nile WENERECO 3.4 Under Construction due for commissioning in Nov Isasha/Rukungiri Eco Power(U) Ltd 6.6 Construction is on going 4 Buseruka/Hoima Hydromax Ltd. 9 Civil works for power house, intake,tail race exit nearing completion. Electromechanical equipment delivery and installation in progress. 5 Kikagati/Isingiro Kikagati Power Ltd. 6 Mpanga/Kamwenge Africa EMS Mpanga Ltd. 7 Maziba 2.3 2x x A new project to replace an old 1 MW power plant that is now obsolete. 18 Civil works for power house, intake,tail race exit including 90m tunneling in advanced stages. T Line funded by MEMD - contract awarded Upgrading to MW Flow of Qd 4.11 m 3 /sec at 40% exceedance

7 Nyagak 1 MHPP County District Total number of HH River name Kween Nebbi 284,468 (1.2m people) Nyagak net Head m 60 Design flow Qd m 3 /s 3 P(el) kw 3500 Implementation cost UGX US$ Economic rate of return on total investment Financial rate of return on community contribution 12% 62% The 3.5 MW Nyakk 1 is due to be commissioned in November Feasibility Studies and design for Nyagak 2 & 3 with capacities of 5 and 2.5 MW respectively and located 3 and 7 Km further downstream on the same river is on going. The power generated ( ~ 11 MW) will supply consumers in the West Nile region through an isolated grid that is to be connected to the National grid. The MHPP will then play an important role in the system stability and reliability.

8 Small Hydro Power Potential in Uganda 1. Mount Elgon Region Potential MW. 2. Mount Ruwenzori. Region Potential > 100 MW 3. South West Uganda. Region Potential >75 MW 4. West Nile Region. Potential > 15 MW

9 Small and Micro Hydro Power Potential Sites in the Mount Elgon area Desk study using1: 50,000 scale or better Contour Map Identify potential rivers and sites. Visit identified sites, collect data and information Apply Screening Criteria on each potential site. Rank the potential sites to come up with best sites. Further investigate at Pre Feasibility or Feasibility Level.

10 Screened Sites (Micro and MW sites) 1. In red, Top 10 ranked Micro Hydro sites of up to 300kW. 2. In Blue Top 6 ranked Small Hydro sites > 1.5 MW

11 Assessment of the Technical attractiveness of a MHP project A MHP Site is more likely to be technically attractive if one or several of the following criteria are fulfilled. 1. Pressure or geodetic head is > 40m 2. Plant gradient (layout)>10% 3. Firm flow -dry season generation> est. demand 4.Technical difficulty 5. Distance to consumer center 6. Consumer density > 30 connections

12 General Screening Criteria used in Small Hydro Projects The criteria given below are normally used. Weights can vary depending on; Relative importance attached to each. The purpose of the project Ownership of the project etc. Criteria weighting factor A. Technical 30% B. Socio-economic 30% C. Socio-cultural 20% D. Environmental 20% TOTAL 100%

13 A: Technical Factors Rating / Screening Summary weight A. Technical A1 Technical Simplicity 20% A2 Available Hydro Potential vs. Demand 20% A3 Plant Gradient 15% A4 Geological Risks 15% A5 Distance from Powerhouse to Load Centre 15% A6 Consumer Density 15% subtotal 30%

14 B: Socio- Economic factors B. Socio-economic B1 Specific Cost of Hydropower Plant 30% B2 Absence of Alternative Power Supply 30% B3 Productive End Use of Electricity 20% B4 Poverty Reduction Impact 20% subtotal 30%

15 C: Socio cultural factors C. Socio-cultural C1 Existing Community Structure 20% C2 Technical Know-how & Experience 15% C3 Management Know-how & Experience 15% C4 Necessity of Resettlement 15% C5 Community Support 20% C6 Accessibility of Community 15% subtotal 20%

16 Environmental factors D. Environmental D1 Environmental Impacts 35% D2 Protection of Natural Resources 30% D3 Potential Water Use Conflicts 35% subtotal 20%

17 Selected sites of 150 kw for Pre- FS Overview: Salient features of MHP sites Name of Site Upper Ngenge Sono Bukwa Lower Ririma Binyiny / Tabok District Kapchorwa Manafwa Bukwa Manafwa Kapchorwa Total number of HH , Peak demand (115%) geodetic Head (WL/WL) kw m gross Head (FB-PH) m net Head m Design flow Qd l/s P(el) kw Potential annual power kwh/a 423, , , , ,947 Implementation cost UGX 461,458, ,983,000 1,115,309, ,367, ,938,000 EUR 201, , , , ,000 EUR/kW 3,782 3,496 5,853 4,591 3,918 EUR/HH

18 Overview: Salient features of MHP sites Name of Site Upper Muyembe Kaporon / Kere Siti River Buluganya TC Upper Bukalasi District Sironko Kapchorwa Kapchorwa Sironko Bududa Total number of HH Peak demand (115%) kw geodetic Head (WL/WL) m gross Head (FB-PH) m net Head m Design flow Qd l/s P(el) kw Potential annual power kwh/a 435, , , , ,813 Implementation cost UGX 593,451, ,166, ,510, ,607, ,968,000 EUR 258, , , , ,000 EUR/kW 4,984 3,003 3,357 5,316 3,637 EUR/HH

19 Future of Small Hydro Power Projects/ Prospects Renewable energy source available for exploitation Currently only a small portion has been or is being developed. Establishment of ERA to ensure easy and speedy acquisition of permits Issuing of one permit per developer at a time ensures that developers do not hold onto sites that they do not develop

20 Upper Muyembe County District Bulambul i Sironko Total number of HH 365 River name Muyembe net Head m 62.0 Design flow Qd l/s 130 P(el) kw 52 Implementation cost UGX 593,451, 000 EUR 258,000 EUR/kW 4,984 Gamago PS Mbigi/Muyembe River Chebenet PS Economic rate of return on total investment EUR/HH % Financial rate of return on community contribution 65% Kikuyo TC

21 07 Kaporon / Kere River. County District Kween Kapchorwa Total number of HH 762 River name Kere net Head m Design flow Qd l/s 90 P(el) kw 122 Implementation cost US$ 449,755 Two load centres within 1.5 km distance Grid about 20km away EUR 365,000 US$/kW US$/HH 590 Economic rate of return on total investment Financial rate of return on community contribution 21% 75%

22 08 Siti River County District Kween Kapchorwa Total number of HH 935 River name Siti river has various poentials ranging from a few hyndred kws upstream of the road bridge, to about 15 MW further down stream. The site in this ToR has an intake near and upstream of the the road bridge just outside the Game Park. This provides options for type of development: Isolated grid for village demand or development of MW capacity for grid connection Siti net Head m 62.0 Design flow Qd l/s 300 P(el) kw 119 Implementation cost UGX 922,510,00 0 Economic rate of return on total investment Financial rate of return on community contribution US$ 494,114 US$/kW 4136 US$/HH % 64%

23 Why bother with Small Isolated grid Hydro Power? Fig xx : Carrying 50kg of maize for milling is normal for women Social Responsibility (Govt) Economic Business Opportunity (IPPs) Environmental

24 THE END