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Parabolic Solar Water Distillation

Joel Newmeyer. Parabolic Solar Water Distillation. TEAM MEMBERS. Mark Branner. Andrew Stonebraker. Motivation About 1 billion people do not have access to potable water Make use of the most abundant naturally replenished energy source

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Parabolic Solar Water Distillation

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  1. Joel Newmeyer Parabolic Solar Water Distillation TEAM MEMBERS Mark Branner Andrew Stonebraker Motivation • About 1 billion people do not have access to potable water • Make use of the most abundant naturally replenished energy source • Parabolic reflective troughs are fundamentally simple and effective devices for concentrating and collecting solar energy Overall Goal • Efficiently supply at least 2 gallons of potable water per day • Create a product that will be relatively easy to establish and operate • Purify water from any source • Inexpensive • Provide clean useful drinking water without interfacing with electricity Determining Distiller Geometry • 2.5 ft2 base cross section • 0.75 ft high condensing surface System Overview • Contaminated water enters an absorber tube (Pyrex glass cover, copper heat pipe) oriented at the focus of a parabolic reflective trough. • Heated water exits absorber tube and enters distiller via spray nozzle to increase surface area per droplet to enhance evaporation. • Remaining hot water pools and distiller then allows for further evaporation. • Vapor is condensed on a cooled condensing surface via heat exchanger oriented on the top of the distiller • Heat exchanger uses cool contaminated water flow to cool the condensing surface and preheat the incoming water • Condensed potable water drains out of distiller via gravity into a collection tube Distiller Sectional View Assembly Front view Right view Distiller inlets/outlets Conclusion • After a semester of research and calculations, we have settled on a final design of a solar still, a solar still that will maximize potable water production. Some of our future project goals include: • Refinement and consistency improvements. • i.e. getting a constant film flow of water down the coned heat transfer surface. • Spray nozzle at heat exchanger inlet. • Fabric material or grooves to distribute the water over the surface. • Fabrication and assembly of our design. • Prototype testing/data acquisition. Acknowledgements Sponsor: Akasha Kaur Khalsa Advisor: Dr. Fletcher Miller Special Thanks: Dr. Kee Moon

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