solar water pumping in nepal
DESCRIPTION
Solar water pumping in Nepal. Fintan McLoughlin. Dublin Energy Lab. Overview scholarship programme. DIT Foundation Awarded 3 month scholarship Renewable World Based in Kathmandu, Nepal RE Projects Solar, Wind, Biogas, Hydro. Three main challenges…. Poverty - PowerPoint PPT PresentationTRANSCRIPT
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Solar water pumping in Nepal
Dublin Energy Lab
Fintan McLoughlin
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Overview scholarship programme
DIT FoundationAwarded 3 month scholarship
Renewable WorldBased in Kathmandu, Nepal
RE ProjectsSolar, Wind, Biogas, Hydro
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Three main challenges…
Poverty60% households live on < $2 a day
EnvironmentOnly adequate rainfall for 3
months a year
InfrastructureOnly 40% have access to electricity
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So why solar pumping ???
MethodsManual, treadle, gravity fed, electricity, liquid fuels, renewable
CostsUpfront capital, operating
OtherLabour intensive, site specific, reliable supply to electricity
Factors
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Solar water pumping
House
Water pump
Community storage tank
Water tap stand
Source storage tank
Transmission pipe
Distribution pipe
Low voltage electricity cable
Control drive
Solar panels (3.5 – 4.5kW)
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and how does it work?
Solar PV & control driveConverts DC to AC electricity to pump
Autonomous systemControlled via radiation sensor
Variable frequencyDrive maintains continuous operation in low solar radiation conditions
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Solar pumping locations
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Predicted water demand
No. of householdsEach household allocated 45 litres/person per day
Community sizeEach village anticipated to grow annually 1.73% over 20 year period
OtherAdditional allocation of water made if school nearby, increased poverty or extreme local environment
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Estimated water demand
Instantaneous measurementPumped water flow rate measured three times under similar conditions and average taken (bucket and stick approach)
Parameters recordedSolar irradiance (Watt/m2), temperature, VOC, ISC, etc
Estimated operationSystem assumed to operate 6.5 hours per day and comparison made between locations (based on lowest solar irradiance region)
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Performance by location…
*
*based on Sunco Systems (SENEPAL) software
Kavre Sirubari Lamdanda Gulmi Kaski -
5,000.0
10,000.0
15,000.0
20,000.0
25,000.0
30,000.0
Predicted water demand Expected water supply Estimated water supply
Volu
me
of w
ater
pum
ped
(lite
rs/d
ay)
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Conclusions
Alternative methodSolar pumping provides good alternative method for water collection in remote environments
Poverty reductionSupplements income, education participation, improved livelihoods
Capital costsUpfront capital costs are still high but decreasing
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Costs
Costs
$/Wp$/litre
pumped$/per
person
$/per metre
lift
Kavre 6.23 1.05 62.12 280.45
Sirubari 4.10 0.78 92.74 227.85Lamdand
a 3.56 0.84 36.38 313.87
Gulmi 5.44 1.31 145.65 317.78
Kaski 3.37 0.64 62.52 192.24