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Smoking Machine W15 DDR Review

Smoking Machine W15 DDR Review. By: Chris Boise Eric Cawley Matt Cross Megan Guarnieri -Cleary Jose Paredes Gideon Oladunjoye. Agenda. Model Update Chimney Movement Actuator Precision Cart Selection Tubing Selection Particle Deposition Computer Update VI Modification

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Smoking Machine W15 DDR Review

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  1. Smoking Machine W15 DDR Review By: Chris Boise Eric Cawley Matt Cross Megan Guarnieri-Cleary Jose Paredes Gideon Oladunjoye Team 14054

  2. Agenda • Model Update • Chimney Movement • Actuator Precision • Cart Selection • Tubing Selection • Particle Deposition • Computer Update • VI Modification • Pump Comparison • Pump Characteristics • EcoFlo • Mainstream Feedback Loop • Ventilation • Impinger • IR Sensors • Electrical System Schematic • Dual H-Bridge • Thermocouple Conditioning • Ignition Coil • Lighting Fixture • Industry Comparison • BOM • Risk Assessment • Test Plan • MSD II Review • Follow Up Team • Schedule • Remaining Items Team 14054

  3. Model Update Incorporation of electronic cigarettes 3 modular design components Lung Cast Cambridge Filter 2ndImpinger Team 14054

  4. Chimney/impinger Movement 10” stroke mini track actuator Mounting bracket and clamps required Team 14054

  5. Actuator Precision 2 actuators in design Controlled by rotating a power screw Built in limit switches (hard) 1” - 2” per second Reverse polarity for travel direction 0” - .250” stopping range Limit - time increment of LabVIEW Delay time of about 4 seconds Team 14054

  6. Cart Selection Rubbermaid: RCP4520-88BEI $159.96 L= 36” W= 24” H= 33” Distance Between shelves= 28” Max weight- 500lb Team 14054

  7. Tubing Selection Best tubing choice? All tubing is 3/8 OD, 1/4 ID Team 14054

  8. Particle Deposition • Sedimentation • Particles settle due to gravity • Diffusion • Deposition due to random particle movement • Impaction • Deposition due to particle collisions with walls or objects • Neglected impaction • Straight tubing Team 14054

  9. Particle Deposition • Assumptions • Incompressible flow • Sea level with standard atmosphere • Continuous fluid • Particles are modeled as spheres • Constant and uniform velocity • 2-dimensional analysis • Ideal flow • Constant properties Team 14054

  10. Particle Deposition Team 14054

  11. Particle Deposition Team 14054

  12. Particle Deposition Team 14054

  13. Particle Deposition Team 14054

  14. Particle Deposition Team 14054

  15. Particle Deposition Team 14054

  16. Particle Deposition • Sedimentation • When ε = 0.01 • 2 % of particles have settled • Between 0-1µm • Highest ε = 0.009 • Negligible deposition due to sedimentation • Diffusion • When Δ = 0.0001 • 2 % of particles have settled • Our results are all below 4.0E-5 • Negligible deposition due to diffusion Team 14054

  17. Computer Computer Found by ME department Well Suited to run latest version of LabVIEW Windows 7, 256 MB RAM, 382 MB of disk space FREE!!! Team 14054

  18. VI Modification Team 14054

  19. VI Modification Team 14054

  20. VI Modification Team 14054

  21. VI Modification Team 14054

  22. Mechanics of Piston Vs. Worm Screw Pump Team 14054

  23. Piston Vs. Worm Screw Pump • ISO standard. • Servo controlled. • Creates a smoother puffing profile. • Sinusoidal puffing profile with constant motor speed. • DC step motor controlled. • Theoretically more accurate puffing profile. • Steady state puffing profile with constant motor speed.

  24. Servo Vs. Step Motor Team 14054

  25. Cost of Servo Motors • “A typical Techno servo gantry system sells for about $2,700 more than a stepper system.” • “[servo motors] tend to be10% to 30% more expensive than similar stepper systems. Brushless servo motor systems tend to be 50% to 100% more.” http://www.techno-isel.com/Tic/H834/PDF/H834P041.pdf Browsing online cost range: $250-$5,000.

  26. Pump • Talked with Dr. Kempski • Devised a simple test to determine Restricting Parameters for dynamic response • A measured mass simulates required force to move syringe • Used to determine time constant response Team 14054

  27. Pump • Sum of forces • Standard form • Vss ; Impedance • Time Constant Team 14054

  28. Pump • Vss found to be 0.00559 m/s • Measured distance off syringe • Time constant Eqn. • F – Fsystem is the same as ‘mg’ from the test • ‘m’ measured to be 0.4137 kg Team 14054

  29. Pump • Time constant Eqn. • Evaluating through, need to estimate carriage weight ‘m’ • Estimated 0.3 kg • Time constant is 0.000413 sec • Under worst case of m=1 kg, τ = 0.00137 sec Team 14054

  30. Pump • Pump specs (NE OEM 570) • Able to reach 45 mL/s • Valid for normal cigarettes • Matched sent flow rates • Unable to test dynamic response (time too reach) flow rates • Looking at E-cig’s • Need to reach ~120 mL/s • Pump DOES NOT MEET REQUIREMENT Team 14054

  31. Resolution of NE-570 Syringe Pump • Syringe sizes: Up to 60 cc, 140 mL partially filled • Motor steps per revolution: 200 • Microstepping: 1/8 to 1 depending on motor speed • Motor to drive screw ratio: 60/15 • Drive screw pitch: 16 rev/in • Advance per step: 3.96875 μm to 31.75 μm depending on motor speed • Syringe diameter: ~37.5 mm Volume per step: (31.75 μm)[1/1000 mm/μm]*pi*((37.5 mm)/2)^2 = 35.07 μL/step = 0.03507 mL/step

  32. EcoFlo • Machines have Wifi and Bluetooth to connect to • Machines can not replace sidestream centrifugal pumps because the flow rate is too high • EcoFlo • 5 – 100 CFM in 1 CFM increments • Replace side stream pump • Only need 3 L/min = 0.1 CFM • Machine is too large to replace • Syringe & centrifugal pump exhale into unit • Machines can easily be used for ventilation

  33. Hose Layout Team 14054

  34. Home Screen Team 14054

  35. Blower Status Screen Note: EcoFlo has 2 blowers. This means that it can draw more air than it is supplying causing a negative pressure chamber. This way smoke does not leak out of chamber.

  36. Sidestream Flow Control Centrifugal pump controlled by flowmeter to 3 L/min. Key Instruments FR4A40BVBN ($95): • Range: 0.4-5 L/min • Accuracy: ±3% of Full Scale = ±0.15 L/min Smaller model available with ±0.25 L/min accuracy. ($75) http://www.keyinstruments.com/standard-products/variable-area-flow-meters/4 flo-rite-series-fr-acrylic-body-flowmeters

  37. Mainstream Flow Feedback Loop Using: P*V = n*R*T Assuming: ṁ1 = ṁ2 Q1 = Q2*[P2*T1/(P1*T2)]

  38. Improving ventilation Vent: Current State Leaks Removal of all smoke Running during testing Team 14054

  39. Improving ventilation Vent: Proposed- Run pump exhaust tubing into the Eco-flo system Eco-flo system will be operation during testing Access doors Team 14054

  40. Improving ventilation Cage: Current State- Lock in design between extruded aluminum and plastic with silicon sealant No Gaskets Not Removable Team 14054

  41. Improving ventilation Cage: Proposed- Same lock in design Use foam gaskets Removable cage Team 14054

  42. Impinger • Impiger most likely filled with methanol for all tests • Impinger may be surrounded by dry ice or liquid nitrogen to motivate particles to condense • Cooling the impinger is not needed for vapor phase, e-cigs. • Other cigarette studies have inserted “a small plug of quartz wool and soda lime glass balls filled to a depth of approximately 6cm. The impingers are held in a polystyrene box filled with sufficient dry-ice to cover the main body of the impinger.” • Notable design challenge: • If a liquid nitrogen bath is needed then a sufficient bath container will be needed

  43. IR Sensor Experiments • Failed to get past IR sensors to work. • Talked with multiple professors with no luck. Question for customer: • Would you like to buy new IR sensors for the automatic termination of the cigarette at its butt or terminate the cigarette after a set number of puffs? • Past IR sensors were bought for $175 but we would recommend researching more robust IR sensors. http://www.eaton.com/Eaton/ProductsServices/Electrical/ProductsandServices/AutomationandControl/SensorsLimitSwitches/PhotoelectricSensors/index.htm

  44. Updated System design Team 14054

  45. Updated System design Team 14054

  46. Updated System design Team 14054

  47. Dual H-Bridge Motor Driver • Eliminates delay present in previous design. • Provides direction controls • 1 driver for 2 actuators as oppose to 4 relays for 2 actuators. Team 14054

  48. Dual H-Bridge Motor Driver • Specifications • Capable of driving 2 motors • Delivering 2 amps per motor • 12 volts • Uses the L298n driver Team 14054

  49. Thermocouple Conditioning • Circuit specifications • Reference Temperature Compensation(using the ADT7320) • High Gain instrumentation amplifier(gain of 100) Team 14054

  50. Ignition Coil Characteristics Team 14054

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