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Detailed Design Review

Detailed Design Review. P13651 – MPI Wax Melter. Agenda. Change from design review System Architecture/subsystems Feasibility Test plan Risk assessment BOM MSD II Plan. Refined Project Goal. Revised Project Goal Processes water-soluble waxes, that only come in flake form

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Detailed Design Review

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  1. Detailed Design Review P13651 – MPI Wax Melter

  2. Agenda • Change from design review • System Architecture/subsystems • Feasibility • Test plan • Risk assessment • BOM • MSD II Plan

  3. Refined Project Goal • Revised Project Goal • Processes water-soluble waxes, that only come in flake form • Provide enough wax to keep up with a max reservoir speed of 50 lb/hr • Process at most 2 gallons of wax at a time

  4. System Architecture Accept wax Hold wax Melt wax Transport wax

  5. Mechanical Components

  6. Hopper

  7. Chute

  8. Stirrer

  9. Tank

  10. Electrical Components

  11. Electrical Block Diagram

  12. Control Logic

  13. Timing Diagram

  14. Motor Specs

  15. Feasibility Analysis

  16. Feasibility: Hopper Hopper > hand-fed solid wax • Reduce operator intervention • Increase processing speed • Better control feed into reactor

  17. Wax Properties • KC 4088D properties: Thermal conductivity – 0.685 W/mK Thermal Diffusivity - 0.360 mm2/s Specific Heat - 1.908 MJ/m3K • Thermal analysis: • Porous material model: Wax analogy • Ratio of specific heats = 1 • Thermal Conductivity = .211 W/(m*K) • Density = 950 kg/m3 • Heat capacity = 2.3 J/(kg*K) • Liquid material model: • Ratio of specific heats = 1 • Thermal Conductivity = .16 W/(m*K) • Density = 860 kg/m3 • Heat capacity = 2.5 J/(kg*K)

  18. Feasibility: Heat Transfer • Thermal analysis done to determine the temperature of the system during operation Start-up time: Evaluate the time to reach steady state with solid wax

  19. 1 sec 10 sec 30 sec 60 sec

  20. Time to Steady State

  21. Feasibility: Transport Wax • Linear actuated trapdoor vs. actuated valve • Reduce chances of wax solidifying inside the valve • Communicates with reservoir • Model flow rate out of reservoir: 50 lbs/hour

  22. Test Plan

  23. Bill of Materials: Mechanical

  24. Bill of Materials: Electrical

  25. Risk Assessment: Mitigated Risks

  26. Future Risks

  27. MSD II Schedule

  28. Design Question • Method for attaching blades to the stirrer shaft • Are there any concerns with the maximum height of the machine?

  29. Questions

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