Titanium Nanotube Reactor:Systems Design Review P13601Members: Bill Dullea

Garry Clarke Jae Ho Kelly McNabb Mary Medino

10/5/12

Summary

•Commercial Use: Solar Cells Catalysts Batteries Super-Capacitors and Membranes Separation media

•Importance: Synthesized very cost effectively

Benchmark

• Front entrance • Semi-press fit door • Sensors to read temperature • Data acquisition using LabView • Preset holes for electrode

placement • Reaction container made from

plexi-glass • No mixer mechanism for

solution • Purge system with N2 • Solution container is plastic cup

Most Important Needs

•Easy to Use Load/unload electrodes and electrolytes

•Design scales up for larger sample size•Control/Monitor

Temperature Voltage Current

•Maintain relative humidity <15%

Functional Decomposition

Systems Architecture 1

Systems Architecture 2

Specifications

Specification Customer Need Description Range

1 5,9Controling Temp of soluotion with 1 deg C

0-70 deg C

2 7,9 Control and monitor voltage. 0-150 V

3 8,9 Control and monitor current. 100 uA-5A

4 10 Humidty Control <15%

5 6,10,11,14Inert Enivorment with Nitrogen Purge

6 19Easy Use for loading and unloading electrodes

7 1,2,13,20 Large volume plastic beaker 250-500mL

Pugh Diagram

Norm Concept 1 Concept 2 Concept 3 Concept 4

EntranceFront door Top door Front entrance Front door Top door

Locking Mechanismsemi-press fit Slide door Slide door slide door/ clamp press-fit

Gauge/ readingsensors Thermometer sensor sensors thermocouple in plastic

Data aquition LabView LabView LabView LabView LabView

Electrode placementpreset holes slip on slide preset holes slide

Container materialplexi-glass plexi-glass plexi-glass plexi-glass plexi-glass

Solution container material

plastic cup plastic beaker plastic cup plastic beaker plastic cup

Stirring mechanismnone magnetic stirrer percolate agitator sonicator

Inert gasN2 N2 N2 N2 dry air

Pugh AnalysisNorm Concept 1 Concept 2 Concept 3 Concept 4

Sealing type S + + + -Entrance S - S + -Reading Temperature

S + + + +

Container Material

S S S S S

Solution Container Material

S + S + S

inert gas S S S S -stirring mechanism

S + + + +

Maneuverability of electrodes

S - + S +

Risk Assessment KeyLikelihood scale Severity scale

1 - This cause is unlikely to happen 1 - The impact on the project is very minor. We will still meet deliverables on time and within budget, but it will cause extra work

2 - This cause could conceivably happen

2 - The impact on the project is noticeable. We will deliver reduced functionality, go over budget, or fail to meet some of our Engineering Specifications.

3 - This cause is very likely to happen

3 - The impact on the project is severe. We will not be able to deliver, or what we deliver will not meet the customer's needs.

MSD Project Risk Assessment Template

ID Risk Item Effect CauseLikelihood

Severity

Importance Action to Minimize Risk Owner

Describe the risk briefly

What is the effect on any or all of the project deliverables if the cause actually happens?

What are the possible cause(s) of this risk?

    L*SWhat action(s) will you take (and by when) to prevent, reduce the impact of, or transfer the risk of this occurring?

Who is responsible for following through on mitigation?

1Controlling Temperature with set specification

Becomes run away reaction Chiller/ Heater 3 3 9 Once we get specs 10/2/12; test the machine for data by 10/9/12 or 10/11/12 Team Leader

2 User Interface with Labview Acquiring poor data analysis Programming Error 2 3 6 Integrate unit tests 1 at a time by weeks; specification

TBD Chief Programmer

3 Controlling Humidity Changes concentration which ultimately changes the end product result Undesired Reactions 2 3 6 Utilized CaCl as a hydrophilic material to control

excess/ produced water (drierite) Team Leader

4 Run away reaction Materials become scrap Temperature becomes too high/current get high2 2 4 Control Temperature/current of the solution Chief Design Engineer

5 Perculation prevents Ti growth Non uniform TiO2 growth Design set by team used

as a cooling effect 2 2 4 Test design theory with water and N2 gas to get a relative data of solution aggetation 10/9 Bill

6 Building Technique/ Machine Work Lose of building integrity Implementing wrong

Technique 1 3 3 3 point check technique, basically double check work with two different perspective Chief Design Engineer

7 Chiller Specification Designed an inappropriate cooling system to our design

Designing reactor cooling system was not specified by client

3 3 9Acquire client's chiller specifications/ maunel by 10/2/12; modify the design with the new specs by 10/5/12

Garry

8 N2 flow rate difference at extremes

Temperature difference may cause the flow rate to be unrealistic

The extreme solution temperature may change the temperature difference within the crude estmation

2 3 6 Run tests with given chiller/heater to see where the limits are, give the client the new specifications Leader

9 N2 reaction Changing concentrations, affecting nanotube growth and stability Cooling system design 2 1 2 Accept that this may happen but research the amount

of change Team Leader

10 Poor Temperature Readings

Client will disappointed since they won’t know the effects of temperature readings on the nanotube growth

Thermocouples readings/ contaminants

2 1 2Buy proper thermocouples with possible alternative materials

Proprietor

11 Nitric Acid Formation Changes concentration and affect reaction rates, and hinder formation of nanotubes

N2 used as a cooling perculation 1 1 1 Accept that this may happen but research if they

affect the solution Team Leader

Current Design

Preliminary Design

N2

Power Supply

Chiller

Sol

Water Trap

Tchil in Tchil out

Tsol

Flow Valve

Future ScheduleStart Week Task Responsible Resources Start End

Party Date Date

Week 6 Begin labview rough draft TBA TBA TBA TBA

Procure materials list TBA TBA TBA TBA

Evaluate materials TBA TBA TBA TBA

Procure equipment list TBA TBA TBA TBA

Update process flow diagram(PFD) TBA TBA TBA TBA

Update risk assessment TBA TBA TBA TBA

Procure cost of materials TBA TBA TBA TBA

Week 7 Decision of materials TBA TBA TBA TBA

Update risk assessment TBA TBA TBA TBA

Review labview TBA TBA TBA TBA

Week 8 Update risk assessment TBA TBA TBA TBA

Detail Design Review Everyone 10/26/2012 10/26/2012

Plan building technique TBA TBA TBA TBA

Start planning future schedule TBA TBA TBA TBA

Team building exercise TBA TBA TBA TBA

Week 9 Start planning winter transfer to spring TBA TBA TBA TBA

Procure cost of using machine shop TBA TBA TBA TBA

Negociate cost of materials with vendors TBA TBA TBA TBA

Questions????