Design Review

Design ReviewJessie Holderman

Beth MadsenAdam Oster

AgendaProject learningSpecificationsAxiomatic designComparisonsProposed designsQuestions

Source: http://www.wallingfordvt.com/planning_&_zoning.htm

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

Project LearningToured Blue Water’s facilitiesInterviewed operatorTalked with external wastewater plant engineerObserved/Analyzed current loading procedureResearch on media transport systems

Source: http://www.smart-kit.com/scategory/study-skills/

Opportunity StatementDevelop an easy to use, safe, cost-effective method to

charge the pilot filters.

Problem StatementA problem in the current loading process of the

pilot filters is creating a safety hazard to workers, costing Blue Water excessive money, and time.

Current loading procedureSand arrives on-site, on trailer

Sand is moved next to the filter

Filter is primed with water.

Operator loads sand into top of filter.

Forklift/Crane lifts operator and sand

Operator climbs ladderwith buckets of sand

Specifications

Axiomatic DesignAxiomatic design is a process used to create functional

requirements from customer needs, develop these into design parameters, and then determine process variables.

Vertical ScrewPros ConsWill move the sand to the

height neededCan move sand at 300 SCFM

Cost- $15,000 for a carbon steel vertical screw

Difficult to set up and moveCan be a safety issueHigh maintenance costRequires a large space to

operate

Source: http://www.martinsprocket.com

Air liftPros ConsSafe to operateLight weightCost effectiveLow maintenanceBlue Water uses technology

System requires that the lift be 50% submerged

Transfer rate is slower than desired

Must be close to filter

Venturi System

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

Venturi SystemPros ConsMaterial does not come into

contact with moving partsVery efficientLow maintenance cost Uncomplicated designEasily removes sand from filter

Need large volume of waterRequires high pressure water

pump

Positive Displacement Pump Pros ConsLow maintenanceLow costVersatile Can be air poweredHigh flow rate

Wear in hosesSand must be in a slurry

Source: http://www.process-controls.com/John_Brooks_Company/diaphragmpumps.htm

Dynamic pump systemPros ConsLow costVersatileEasy to useHigh flow rates

Wear due to slurry on moving parts

Wear in hosesSand must be in a slurry

Source: http://www.heavypump.com/Productshow.asp?ArticleID=17

Venturi System

Component Cost

Pump $600

Venturi Nozzle $100

Fittings $50

Slurry Hose $200

Fabrication Materials

$50

Total $1,000

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

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

Component PricePump $ 800

Slurry Hose $ 200Fittings $ 50

Fabrication Materials

$ 50

Total $ 1,100

Dynamic SystemGas-operated impeller pumpFlow rate of 158 gpm, with head of 95 ftEstimated time to charge CF3: < 2 min

Component PricePump $ 500

Slurry Hose $ 200Fittings $ 50

Fabrication Materials

$ 50

Total $ 800

Future WorkCalculate specifications for each componentFind vendors and detailed costsCreate fabrication drawingsFabricate components or order componentsTest completed system

Questions

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