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Design Review

Design Review. Jessie Holderman Beth Madsen Adam Oster. Agenda. Project learning Specifications Axiomatic design Comparisons Proposed designs Questions. Source: http://www.wallingfordvt.com/planning_&_zoning.htm. http://seniordesign.engr.uidaho.edu/first_semester/process.html.

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Design Review

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  1. Design Review Jessie Holderman Beth Madsen Adam Oster

  2. Agenda • Project learning • Specifications • Axiomatic design • Comparisons • Proposed designs • Questions Source: http://www.wallingfordvt.com/planning_&_zoning.htm

  3. http://seniordesign.engr.uidaho.edu/first_semester/process.htmlhttp://seniordesign.engr.uidaho.edu/first_semester/process.html

  4. Project Learning • Toured Blue Water’s facilities • Interviewed operator • Talked with external wastewater plant engineer • Observed/Analyzed current loading procedure • Research on media transport systems Source: http://www.smart-kit.com/scategory/study-skills/

  5. Opportunity Statement Problem Statement Develop an easy to use, safe, cost-effective method to charge the pilot filters. A problem in the current loading process of the pilot filters is creating a safety hazard to workers, costing Blue Water excessive money, and time.

  6. Current loading procedure Sand arrives on-site, on trailer Sand is moved next to the filter Filter is primed with water. Forklift/Crane lifts operator and sand Operator loads sandinto top of filter. Operator climbs ladder with buckets of sand

  7. Specifications

  8. Axiomatic Design Axiomatic design is a process used to create functional requirements from customer needs, develop these into design parameters, and then determine process variables.

  9. Vertical Screw Pros Cons • Will move the sand to the height needed • Can move sand at 300 SCFM • Cost- $15,000 for a carbon steel vertical screw • Difficult to set up and move • Can be a safety issue • High maintenance cost • Requires a large space to operate Source: http://www.martinsprocket.com

  10. Air lift Pros Cons • Safe to operate • Light weight • Cost effective • Low maintenance • Blue Water uses technology • System requires that the lift be 50% submerged • Transfer rate is slower than desired • Must be close to filter

  11. Venturi System http://www.penberthy-online.com/literature/jets/DIM%20-%201701.pdf

  12. Venturi System Pros Cons • Material does not come into contact with moving parts • Very efficient • Low maintenance cost • Uncomplicated design • Easily removes sand from filter • Need large volume of water • Requires high pressure water pump

  13. Positive Displacement Pump Pros Cons • Low maintenance • Low cost • Versatile • Can be air powered • High flow rate • Wear in hoses • Sand must be in a slurry Source: http://www.process-controls.com/John_Brooks_Company/diaphragmpumps.htm

  14. Dynamic pump system Pros Cons • Low cost • Versatile • Easy to use • High flow rates • Wear due to slurry on moving parts • Wear in hoses • Sand must be in a slurry Source: http://www.heavypump.com/Productshow.asp?ArticleID=17

  15. Venturi System • Flow rate of 6.9 gpm, with 10 gpm water needed to achieve this • Estimated time to charge CF3: 44 min

  16. Positive Displacement System • Air–operated double diaphragm pump • Flow rate over 4 gpm with heads of 30 ft • Estimated time to charge CF3: 75 min

  17. Dynamic System • Gas-operated impeller pump • Flow rate of 158 gpm, with head of 95 ft • Estimated time to charge CF3: < 2 min

  18. Future Work • Calculate specifications for each component • Find vendors and detailed costs • Create fabrication drawings • Fabricate components or order components • Test completed system

  19. Questions Source: http://www.co.sanmateo.ca.us/smc/department/dpw/home/0,,5562541_5562587,00.html

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