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Using a PV system to power an emergency water disinfection system Curt Elmore, Associate Professor...
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![Page 1: Using a PV system to power an emergency water disinfection system Curt Elmore, Associate Professor of Geological Engineering Mariesa Crow, Director of.](https://reader035.fdocuments.net/reader035/viewer/2022070410/56649ead5503460f94bb5186/html5/thumbnails/1.jpg)
Using a PV system to power an emergency water disinfection
system
Curt Elmore, Associate Professor of Geological Engineering
Mariesa Crow, Director of the Energy Research and Development Center
Matt Vitello, Graduate Student
University of Missouri Energy SummitColumbia, Missouri
April 23, 2009
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!Emergency!
• Critical commodities– Drinking water– Electricity– Transportation
(import) of supplies
• On-site treatment is the solution?
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Drinking water treatment technologies
• Principal concern = ubiquitous contamination– Fecal pathogens
• Chlorination• Ozonation• Reverse Osmosis• Ultraviolet light• Others
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Timing is everything
• Crystal ball needed?– Shelf-life = critical concern!
• Chemicals• Fuel• Energy storage
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UV = good candidate!
• Infinite shelf life• Commercial systems available• NSF/ANSI certified• No harmful residuals• May also treat some pesticides,
solvents, and explosive compounds
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UV has some downsides …
• No residual• Energy intensive• Mercury in lamp
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Pros > Cons
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Renewable Energy System
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Objectives• Mobile – go to surface water sources• Is self-powered by wind turbine & photovoltaic cells• Supplemental power from portable electrical generator• Can be towed by a standard pickup truck• Can be set up & operated with little training• Can be placed in storage for extended time periods• Low-maintenance, no significant consumable supplies• Affordable for municipal and regional civic entities that
are tasked with addressing civil emergencies• Has on-board test equipment to validate disinfection
function
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Concept
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Reality
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Performance
• Wind turbine redundant– Complexity– Cost– Weight– Safety– Personnel– Lightening– Visibility– Greater area of deployment
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Performance
• Pumping/flowrate was the limiting factor– Proactive Environmental Products, Monsoon
Model PRO10597: 48VDC:24VDC
• 4 min @ 3.6 gpm• Additional pumps/PV required for
pretreatment
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Performance
• Treatment averaged 2.4 gpm• UV system operates for 19 min• Continuous UV operation possible if sunny• Single charge = 19 min of UV operation
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Performance
• Disinfection met coliform standards for “natural” water
• Disinfection met coliform standards for spiked water
• Coliscan MF for colony enumeration• IDEXX Colilert for presence/absence• Other parameters OK
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What would a production system look like?
• Use external pumps (think fire tankers)• Larger elevated charge tanks• Throughput goal = 10 gpm– Single UCAP charge (19 min)– 2 L/day– 360 people
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Production Cost < $40K
• On-going work– Energy management– Uncertainty analysis– Commercialization
• Questions?