P14417: B9 Plastics - Particle Filter System Design

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P14417: B9 Plastics - Particle Filter System Design Dan Anderson / Thomas Heberle / Perry Hosmer / Karina Roundtree / Kelly Stover October 1, 2013

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P14417: B9 Plastics - Particle Filter System Design. Dan Anderson / Thomas Heberle / Perry Hosmer / Karina Roundtree / Kelly Stover October 1, 2013. Agenda. Recap: Background Info. & Requirements System Analysis Functional Decomposition Concept Analysis Concept Selection - PowerPoint PPT Presentation

Transcript of P14417: B9 Plastics - Particle Filter System Design

Page 1: P14417: B9 Plastics -  Particle Filter System Design

P14417: B9 Plastics - Particle FilterSystem Design

Dan Anderson / Thomas Heberle / Perry Hosmer / Karina Roundtree / Kelly Stover

October 1, 2013

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Agenda• Recap: Background Info. & Requirements• System Analysis

– Functional Decomposition– Concept Analysis

• Concept Selection– System Architecture– Engineering Analysis– Risk Assessment– Test Plan

• Next Steps

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Background Information & Requirements

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Problem Statement

Current State:

• In order to use the Better Water Maker (BWM) users must first pour the water through a cloth before being treated.

Desired State:

• The device should clear particles from water to allow the BWM to operate more effectively.

• The device should be simple to use and operable by both women and children.Project Goals:

• Analyze the design selected by P13418

• Improve the effectiveness of the Better Water MakerNotable Constraints:

• Must be usable by both women and children

• Only locally available materials may be consumed

• Must not negatively impact the smell and taste of water

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Customer Requirements Rev. 3 9/6/13Rank: 9 high,3 med,1 low

Category Customer Req. # Importance Description Comment/Status

Constraints CR1 3 Flow rate must be at least 1 lpm

Ease of Use CR2 9 Easy to Clean/Recharge Ease of Use CR3 3 Lightweight for transport. Ease of Use CR4 3 Has a minimal start-up period. Ease of Use CR5 9 Operates using energy available naturally (gravity, human power, etc.) Economics CR6 9 Filter is Inexpensive Economics CR7 9 Usable by a family of 5, for 2-5 years w/out full replacement

Economics CR8 9 Requires no consumables for operation, except for very cheap & locally available materials (salt, soap, sand, etc.)

Functionality CR9 9 Improves UV Transmission Functionality CR10 9 Removes Particles (turbidity/total suspended solids) Functionality CR11 3 Does not negatively affect the taste of the water Safety CR12 9 Safe to use. (No hazardous releases)

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Engineering RequirementsRev. 3 9/6/13

Category Customer Requirement Function Metrics Direction Units Marginal Target

ConstraintsFlowrate Meet flow rate constraint

Amt of water per min. ^ lpm (Liters per Minute) 1 2Ease of Use Easy to Clean/Recharge Easy to prepare for use Time to clean v Minutes 10 5Ease of Use Lightweight for transport. Minimize weight of filter Weight in LBs v LBs (Pounds) 10 5Ease of Use Has a minimal start-up period. Minimize start-up Time to begin filtering v s (seconds) 30 10

Ease of Use Operates using energy available naturally (gravity, human power, etc.) Doesn't need power source Binary (Yes/No) - - - No

Economics Filter is Inexpensive Minimize cost of filter Total cost to produce v $ (dollars) 25 20

Economics Usable by a family of 5, for 2-5 years w/out full replacement Maximize durability of filter Mean Time To Failure ^ hrs (hours) 365 912.5

Economics Requires no consumables for operation, except for very cheap & locally available materials (salt, soap, sand, etc.) Minimize cost to maintain Annual cost to operate v $ (dollars) 2 0

FunctionalityRemoves Particles (turbidity/total suspended solids), improves UV TRANSMISSION Turbidity is decreased Binary (Yes/No) - - - Yes

FunctionalityRemoves Particles (turbidity/total suspended solids), improves UV TRANSMISSION total suspended solids decreased

amt of total suspended solids v mg/L (milligrams per liter) 20 0

Functionality Does not negatively affect the taste of the water No negative taste of waterPercent of people who say water tastes bad - % 5 0

Safety Safe to use. (No hazardous releases) Doesn't produce hazardous release Binary (Yes/No) - - - No

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House of Quality Engineering Requirements

Needs Priority

Turbidity is decreased

Total suspended solids decreased

Minimize cost of filter

Maximize durability of filter

Minimize cost to maintain

No negative taste of water

Doesn't produce hazardous release

Meet flowrate constraint

Easy to prepare for use

Minimize weight of filter

Minimize start-up

Doesn't need power source

Flowrate must be at least 1 lpm 3 x Easy to Clean/Recharge 9 x Lightweight for transport. 3 x x Has a minimal start-up period. 3 x Operates using energy available naturally (gravity, human power, etc.) 9 x x

Filter is Inexpensive 9 x Usable by a family of 5, for 2-5 years w/out full replacement 9 x Requires no consumables for operation, except for very cheap & locally available materials (salt, soap, sand, etc.) 9

x x

Improves UV Transmission 9 x x Removes Particles (turbidity/total suspended solids) 9 x x Does not negatively affect the taste of the water 3 x

Safe to use. (No hazardous releases) 9 x

Measure Binary

(Yes/No)

mg/L (millig

rams per

liter)

$ (dollars)

hrs (hou

rs)

$ (dollars

) %Binary

(Yes/No)

lpm (Liters

per Minute

)Minut

es

LBs (Poun

ds)

s (secon

ds)

Binary (Yes/N

o)

Sum of (Priority) 18 18 12 9 9 3 9 3 18 3 12 9

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System Analysis

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Functional Decomposition

Remove UV absorbing particles

from water

Clean / recharge

filterAccess water

Collect water

Introduce water and

filter

Separate water and particles

Generate different

forces on the particles and

the water

Convert energy to work to separate particles

Isolate and contain

filtered water

Restrict cross-

contamination (barrier)

Clean / recharge

filter

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Morphological AnalysisClean / recharge filter

Rinse with “clean” water

Brush Soap

Collect water Bucket Gerry can Bag CanteenIntroduce water and filter

Pour / push water through filter

Push filter through water

Pull filter from bottom of water

Generate different forces on particles and water

“French-press”

Chemical process (large particles stick together and sink)

“Colander” style

Mesh filter at top

Pump (pull water from source, push through spigot)

Centrifuge

Magnet draws filter through water to adjust diameter

Vortex pushes particles down, pump clean water out

Energy to separate

Gravitational Electromagnetic

Electrical Human Power

Mechanical

Chemical

Restrict Cross-contamination

Filter is barrier

Physically move water to different container

Scoop out particles

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Concept Generation

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Pugh AnalysisCriteria French

PressLid with Diffuser

Spring Aided French Press

MagNet Pump Chemical

Treatment Colander Centrifuge

Adjustable Datum + + + + + + +

Cheap Production Datum S - - - - + -

Durability Datum + S + + S + +

Ease of Use Datum + + - + + + -

Flow rate Datum - S S + - - -

Weight Datum + S - - + + -

Size Datum + S + - + + +

Easy to clean Datum - - S - + S -

Cross-contamination

Datum + S S + + + +

Hazard Datum + S S - - s S

Easy to repair Datum S - - - + - -

Replacement parts Datum S - - - - S S

Transportation Datum + S + S + + S

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MagNet

• Pros– Adjustable diameter– Reduced user

intervention– Self Aligning

• Cons– Expensive– Difficult to repair

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Springs

• Proso Good flow rate

• Conso Complexo Bulky

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Colander

• Pros– Simple– Large mesh area

• Cons– Not as durable as other

ideas

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Lid

• Proso Easy to useo Compacto Simple

• Conso Lift water to pour

ino Have to take apart

to clean

Selected Concept!

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System Architecture

Diffuser Plate

Mesh Filter(s)

FastenersVertical

Positioning Device

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Engineering Analysis

• Diffuser Plate– Thickness– Necessary hole size

• Mesh Filter(s)– Mesh size– Flow rate– Multiple filters

• Fasteners– Easily disassembled for

cleaning

• Vertical Positioning Device– Volume of water to be

filtered• Materials• Contents of water• Amount of water to be

filtered at a time

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Risk AssessmentID Risk Item Effect Cause Liklihoo

dSeverity

Importance

Mitigation

1 Concentration of Stress

Damage to filter within 2 years

Repeated use of filter

2 3 6Spread load about the edge of filter

2 Leakage

UV Absorbing particles reach "cleaned" water

Not a tight seal

1 1 1

Use rubber gasket, clamped down tightly

Stress on clamp /fastener

3 2 6Calculate necessary force rating

3 Filter may be too tall

Not enough room for "clean" water

Planning issues, imprecise calculations

1 1 1

Calculate necessary height ASAP, test for fill amount

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Risk AssessmentID Risk

Item Effect Cause Liklihood

Severity

Importance

Mitigation

4 Corrosion

Water tastes bad, equipment fails

Improper cleaning, interaction of materials with water

1 3 3

Use materials which won't corrode, provided clear cleaning instruction

5

Flow rate does not meet requirement

Not meeting customer needs

Insufficient area of filter/diffuser, filter isn't porous enough

2 3 6

Increase surface area of filter, find more porous materials

6 Cleaning is difficult

Users may not clean properly or often enough

Difficult to take apart, reassemble

3 3 9

Supply cleaning instruction, minimize number of parts, minimize disassembly/assembly time, visual cues

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Risk AssessmentID Risk

Item Effect Cause Liklihood Severity

Importance

Mitigation

7

Costs more that $25/unit

Product may not be used

Materials selection, construction

3 3 9 Design to be low cost

8 Weight is too much

Too heavy for women and children

Materials selection 1 3 3

Ergonomic study, design to allow women and children to use

9 Incorrect usage

Filter could break, water not cleaned

Not intuitive, poor instructions

1 3 3

Use visuals whenever possible, minimize text, poka-yoke

10

Stability issues with bucket

Bucket tips, breaks, etc

Poor structural design, unlevel surface

2 1 2

Proper attachments, Instructions include level

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Test Plan

• Mesh Layers (Flow rate)o Compensate for water build up

• Diffuser Plateo Force of water

• Fastening Equipmento Stress Test

• Lip Levelo Forces due to weight of water

• Handleso Structural integrity

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Next Steps

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Milestones Ahead

Subsystem Design ReviewPresent & Demonstrate POC 10/24/2013

Proof of ConceptAnalysis, Simulations & Prototyping of Critical Subsystems. 10/20/2013

Next Level DecompositionIdentify Subsystems & Determine Specs. 10/12/2013

Critical Subsystems & InterfacesDemonstrate feasibility in greater detail. 10/8/2013

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Looking Forward

• Immediate Next Stepso Use feedback from SDR to revisit areas as necessaryo Engineering Analysis Taskso Determine specific methods/equations for test plan.o Identify Critical Subsystems & associated

Specifications

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Questions / Comments