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The Ferret

The Ferret. Turbidity Terminators Shubha Bhar Lindsay Ellis Morgan Rog Melanie Tan. 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

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The Ferret

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  1. The Ferret Turbidity Terminators Shubha Bhar Lindsay Ellis Morgan Rog Melanie Tan

  2. 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

  3. Our Design • What’s Different? • Rigid, straight tube • Contractible flexible tube • Centered weight • No String • Calculated Parameters: • Orifice size: 0.8 mm • Headloss: 10 cm Q = KAo(2gΔh)1/2

  4. Schematic • User pours water in top bucket • As water flows through rigid tube, flexible tube contracts • Water collects in bottom bucket at a constant flow

  5. Concerns • Finding contractible tubing • Not using a string • Orifice Clogging • Orifice Size • Upward force of Ferret Tube • Tilting/Balancing the weight • Waterproofing

  6. Building Our Device Materials: • 5 gallon bucket • small bucket • 3/8’’ PVC piping • Ferret Tunnel • Epoxy • Aquarium Sealant • Putty • Duct Tape Roll

  7. Building Problems • Waterproofing the Ferret Tunnel • Orifice Size, K value

  8. Testing for Leaks: 1st Trial Trial Time: 30 minutes

  9. Testing the Flow: 2nd Trial Over a period of 2.5 hours

  10. Testing the Flow: 3rd Trial Over a period of 5 hours

  11. Testing the Flow: Turbidity Trial Over a period of 8 hours

  12. 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

  13. Recommendations • Clear bucket, easier maintenance • Better waterproofing • Precise Orifice • Use of automatic draining valve

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