solar water pumping in nepal
Post on 23-Feb-2016
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Solar water pumping in Nepal
Dublin Energy Lab
Fintan McLoughlin
Overview scholarship programme
DIT FoundationAwarded 3 month scholarship
Renewable WorldBased in Kathmandu, Nepal
RE ProjectsSolar, Wind, Biogas, Hydro
Three main challenges…
Poverty60% households live on < $2 a day
EnvironmentOnly adequate rainfall for 3
months a year
InfrastructureOnly 40% have access to electricity
So why solar pumping ???
MethodsManual, treadle, gravity fed, electricity, liquid fuels, renewable
CostsUpfront capital, operating
OtherLabour intensive, site specific, reliable supply to electricity
Factors
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)
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
Solar pumping locations
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
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)
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)
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
Questions ?
Email:fintan.mcloughlin@dit.ie
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
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