solar pv water pumping for small-scale farmers in · pdf file12.03.2011 ·...

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Solar PV Water Pumping for Small-Scale Farmers in Uganda

Monika RammeltRWSN Forum, 2nd December 2011

RWSN Forum, 2nd December 2011: Photovoltaic Pumping Systems in Rural Water Supply

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Background

Cooperation of GIZ Financial Sector Development and EnergyProgramme in order to pilot a loan product for solar PV basedirrigation

GIZ Energy Programme financed solar PV pump and supported thepilot farm with technical expertise

Advanced training on solar PV water pumping targeting solar technicians


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Water source: Surface pond with constant ground water inflow (95 m distance to tank)

Drip irrigation system for vegetable production (1/4 acre field) supplied by Ugandan company incl:Water tank (1,000 l)Drip irrigation tubesSeedlingsFertilizers and pesticides

Solar PV water pump (Shurflo Surface Pump, 120 Wp) distributedand installed by Ugandan company

Pilot Scheme in Kalongo, Agago District


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Installation of pilot scheme


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Installation of pump


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Harvest


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Price in UGX Price in EUR

Drip irrigation system incl. installation

2,450,000 700

Seedlings, fertilizer etc. 1,423,000 400

Solar PV water pump incl. installation

5,124,370 1,450

Additional (optional) costs (stand for water tank, transport etc.)

1,520,000 430

Total 10,517,370 2,980

Costing


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Outcome

Crop Number of planted seedlings

Number of seedlings that survived

Survival rate

Profit in UGX

Cabbage

Tomatoes type I

Tomatoes type II

Onions

1601

797

180

2432

1572

732

141

1687

98%

91%

78%

70%

Summe

280,000/=

886,000/=

483,000/=

267,000/=

1,916,000/=


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Potential for savings of cost

Local production of seedlings (saves transport costs)Alternative fertilizers and pesticides (organic methods)Manual water pump

Pricein UGX

Irrigation system incl. installation 2,450,000

Seedlings, fertilizers etc. 300,000Manual water pump 500,000Additional costs (stand for water tank, transport, etc.) 300,000

Total 3,550,000

Cost savings of up to 7 mio UGX possible


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Performance of pump on pilot farm

Pilot duration 112 days, of which 44 days without rain, of which pump functioned without problems on 36 days (4 days with failure)

Pump needs 1 h to fill tank, manual pumps can pump up to 4,000 l/h

Problems experienced:

• Pump suction clocked (quality of water source)

• Angles in pipe systems caused leakages

• Insufficient after-sales serve (distance Kampala to pilot site too

high)


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General observations

Only 1 pump model for small-scale farmers readily available on Ugandan market – Shurflo DC booster pump; other pumps can beordered in Uganda against extra charge

Shurflo is a diaphragma pumpand hence susceptible to problemswith dirty and muddy water

The Shurflo motor (DC motor with brushes) is suitable for shortpumping intervals rather than continuous daily pumping

Lack of trained technicians capable of maintaining and repairing solar PV pumping systems

Unavailability of spare parts in project region

Theft protection (pole mounting) keeps panels out of reach forcleaning


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1-week training for solar technicians on solar PV water pumping in Northern Uganda in Dec 2010

Basics (physics, PV, hydraulics, water sources)

Design and installation of pump and irrigation system

Field visit to pilot site

Operation and maintenance

Market overview on available productsin UG

Advanced training for solar technicians


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Thank you.

Monika RammeltGIZ Energy Programme UgandaAdvisor Rural Electrification

Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) GmbH

Office A312, Amber House, Kampala RoadP.O. Box 10346Kampala, Uganda

T +256 772 746 387F +256 414 234 165M [email protected] http://www.giz.de


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Solar water pumping in Northern Uganda

Ministry of Energy and Mineral developmentWafula wilson – Principal Energy [email protected]. 0772867054


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Solar water pumping in former IDP camps

These IDP camps were setup in northern Uganda during the Kony war.Due to need for water, various NGOs, and donors provided water facilities using solar technology and diesel powerThere are 73 water pumping systems of which 35 system are powered by solar PV and 38 systems are powered by diesel.All the diesel engines are still functioning but they are not used due to high costs of diesel fuel, remote places and low income of the rural population.The districts prefer to convert the diesel systems to solar


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Findings on the SWP systems

Ten solar water pumping systems were working some with missing/faulty components like water tapes, control gates, broken pipes, and regulators. Three solar water pumping systems were trouble shoot during the field trip.There are no active water boards in all the solar water pumping systems which have resulted in failure of small components and increase in systems component stealing.Four solar water pumping systems components are stored at police posts, army barracks, and sub County after recovery from theft.


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Solar water pumping systems that are not working have minor faults like sunken water levels, failed/stolen regulators, failed water pumps, open water taps, dirty solar modules, and lack of active water boards.Simple analysis of the visited solar modules have an array of 16,KWattpeak and the current estimated market value stands at 192,420,000/= (One hundred Ninety Two Million, Four Hundred Twenty Thousand Uganda shillings) excluding other components. (USD 80,000)During the visit the team also noticed failed five solar water heating systems due to failed solar water pumping systems.There is willingness from the Water and Sanitation Development Facility – North and Gulu Water Department to work with the Ministry to rectify the systems.


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The inspected solar water pumping systems in the former IDP camps are categorized in 3 groups asbelowGroup Number Status Requirement Recommendation

1 18 systems working systems or not working

Replacement of recovered solar panels, water taps, connection gates, damaged distribution pipes, lowering of water pumps, trouble shooting, and community mobilization

Repair the systems by the Ministry through GIZ/PREEEP project as no major procurement of Equipments is required and will handle in house

2 7 system Not working due to stolen / failed component

Need to replace one major component due theft, technical failed, or removed components.

Need procurement of Equipments which can be handled after group I systems

3 10 systems Dismantled systems

Need relocation, replacement of more than one major component or whole system

Need further study after rectification of the Group I and II systems


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Summary of the SWP systems


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Challenges of Solar Water Pumping Systems in former IDP camps

Theft and vandalismLack of collective responsibilityLack of technical capacity for service and maintenanceLack of financial contribution of communitiesLack of income generating activities attached to the SWPSLimited end-user training and sensitizations


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Failed solar water pumping systems one at Barr primary schoole with the solar modules atored at the sub County and one with broken water tank at Pajure health unitwith the


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Conclusion

Solar water pumping is the viable and sustainable way of supplying safe water to the rural communitiesNeed for support from governments, donors, and NGOs to support rural communitiesTechnical trainings at various levels is also required

solar pv water pumping for small-scale farmers in · pdf file12.03.2011 ·...

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