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Drinking Water Supply System using Solar Power . Renata Bakousseva Hessa Darwish Hall Sun. Table of Contents. Introduction Energy Alternatives Concentrated Solar Power (CSP) Wind Power Solar Power System Design Hydraulic System Design Financials Future Considerations . Introduction.
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Drinking Water Supply System using Solar Power RenataBakousseva Hessa Darwish Hall Sun
Table of Contents • Introduction • Energy Alternatives • Concentrated Solar Power (CSP) • Wind Power • Solar Power System Design • Hydraulic System Design • Financials • Future Considerations
Introduction • 884 million people in the world live without access to clean water • 1.2 million children die each year as a result of water related diseases such as diarrhea, malaria, and trachoma
The Two Systems • Apatut, the Philippines • 150 households • ~750 inhabitants • 300 mi. north of Manila
The Two Systems • Las Delicias, El Salvador • 470 households • ~3,000 inhabitants • 25 mi. from San Salvador
Problem Identification Provide sustainable, affordable, reliable power source
Power Tower The mirror reflects solar power onto a collector within the power tower. The power tower then sends the molten fluid through the Rankine cycle which generates electricity
Parabolic Trough • Sunlight hits the collectors which reflect the heat onto the absorber tubes • The transfer fluid collects the heat and transfers it to a Rankinesystem
Solar Dish Engine • The sunlight rays collect on the reflector which focuses the collected heat on the receiver • The receiver then transfers the heat onto the engine, a Stirling heat engine that converts the heat power into mechanical work
Solar Panels • BestSun New Energy Co., Ltd • Monocrystalline Silicon Cells
Current design- Las Delicias VFD PV modules 394’
New Design, Las Delicias New tank (20,000 gal) 2 new booster pumps 1 new submersible pump
System - Pump performance curves: Las Delicias, El Salvador; submersible pump BestEfficiencyRange
Financial Assumptions • Revenue Assumptions • Productivity Gain • Cost Assumptions • $.69/Watt for panels • $.38/Watt for other/indirect • .3% maintenance costs
Financial Results • Philanthropic Project • 20 year life span • Government viewpoint • Discount rate = return on debt = 1.6% • Las Delicias, El Salvador • NPV = $413,000 • IRR = 36% • Apatut, the Philippines • NPV = $78,000 • IRR = 41%
Conclusion • Photovoltaic power supply • Low maintenance costs • Efficient hydraulic system • Economic benefits of clean water
Thank You! • Professor Leonard A. Fabiano • Professor Sean P. Holleran • Adam A. Brostow • Engineers Without Borders • Consultants
Tank Sizing Stresses on a curve Stresses on a rectangle Hoop Stresses, unconstrained and constrained.
Tank Sizing Sizing Based on Maximum Tank Volume, operated from pumps
Pump Scheduling • Extreme Scenarios • Daylight Pumping only (9 hrs) • No batteries • Wasted energy • Continuous pumping (22 hrs) • Maximum storage • Iterative method • Utilize excess from daylight only scenario