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The Ferret Turbidity Terminators Shubha Bhar Lindsay Ellis Morgan Rog Melanie Tan
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Project Goals Obtain constant flow rate of 20 L/day Design an inexpensive, practical, and easy to use device Consider effects of turbidity Consider effects of varying flow Determine whether design is sustainable Improve WHO design
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Our Design What’s Different? Rigid, straight tube Contractible flexible tube Centered weight No String Q = KA o (2gΔh) 1/2 Calculated Parameters: Orifice size: 0.8 mm Headloss: 10 cm
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Schematic 1)User pours water in top bucket 2)As water flows through rigid tube, flexible tube contracts 3)Water collects in bottom bucket at a constant flow
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Concerns Finding contractible tubing Not using a string Orifice Clogging Orifice Size Upward force of Ferret Tube Tilting/Balancing the weight Waterproofing
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Building Our Device Materials: 5 gallon bucket small bucket 3/8’’ PVC piping Ferret Tunnel Epoxy Aquarium Sealant Putty Duct Tape Roll
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Building Problems Waterproofing the Ferret Tunnel Orifice Size, K value
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Testing for Leaks: 1 st Trial Trial Time: 30 minutes
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Testing the Flow: 2 nd Trial Over a period of 2.5 hours
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Testing the Flow: 3 rd Trial Over a period of 5 hours
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Testing the Flow: Turbidity Trial Over a period of 8 hours
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Analysis Achieved approximately constant flow rates We didn’t obtain Q= 20 L/day Possible Reasons for Flow Fluctuations Possible Leaks Tilting PVC tube, may have caused friction Upward force of ferret tube
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Recommendations Clear bucket, easier maintenance Better waterproofing Precise Orifice Use of automatic draining valve
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