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High Temperature Waste Pasteurizer

P13411. High Temperature Waste Pasteurizer. Brian Kilger Kyle Cohn Kyle Weston Stephanie Mauro. The Team. Kyle Weston- Team Leader Stephanie Mauro- Thermal Engineer Kyle Cohn- Alternative Energy Engineer Brian Kilger - Materials Engineer. Agenda.

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High Temperature Waste Pasteurizer

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  1. P13411 High Temperature Waste Pasteurizer Brian Kilger Kyle Cohn Kyle Weston Stephanie Mauro

  2. The Team Kyle Weston- Team Leader Stephanie Mauro- Thermal Engineer Kyle Cohn- Alternative Energy Engineer Brian Kilger- Materials Engineer

  3. Agenda • Feedback (expectations and priorities for review) • Review from systems design review • Solar cooker experiment • The selected design and key features • Construction plan • Thermal analysis of the design • Updated risk assessment and project plan going into MSDII

  4. Feedback We are Looking for from This Review • Comments on selected design and material selection • Pros and cons of the proposed test plan • Compatibility of our ideas with Haiti

  5. Problem Statement • The primary objective of this project is to transform human waste into a safe to use fertilizer using renewable energy. The waste pasteurizer will be designed to meet the needs of a Haitian family (3-5 liters) while keeping the cost per unit under $50 USD.

  6. Customer Needs

  7. Engineering Specifications

  8. Functional Decomposition

  9. Systems Architecture

  10. The Simplified Project Scope

  11. Remaining Schedule Task List

  12. The Solar Cooker Experiments • 3 separate experiments • Trial 1: • No Adjustments • Small Stainless Steel Pot • Not Peak Sunlight • Trial 2: • Adjustments • Small Stainless Steel Pot • Not Peak Sunlight • Trial 3: • Adjustments • Large Pot • Peak Sunlight

  13. The Summarized Results

  14. The Summarized Results

  15. The Selected Design • Cylindrical container for waste handling inside another cylindrical container, using air as insulation • Heated from direct sunlight to top and reflected light from side flaps • Removable lid and inner container • Temperature indicator tool sticking through the lid

  16. The Selected Design Fully Assembled Unit • Cross-Sectional View

  17. Test Plan

  18. Bill of Materials

  19. What is a WAPI • Sight dependent • All parts submerged in water • Need to take out and flip over

  20. The Modified WAPI Idea(iPooP) • Touch dependent • No touching parts submerged in waste • Spring loaded so wax won’t stick

  21. Sealing Mechanism Lid design for use with latch Possible Latches Attach larger part to side of outer bucket Pull either from grooved tab attached to lid or screw loop into side of lid and pull down from there. • Grooves cut into tab of same material as lid (acrylic) for latch to grab.

  22. Feasibility • Solar irradiance data was collected from Puerto Rico using the average conditions by day for the past 40 years • Determined how many days the minimum wattage was met for 5 hours • Calculations show that 306 days will meet our needs

  23. Material Properties for Thermal Analysis • Composition of Waste gathered from Appropriate Technology for Water Supply and Sanitation composed by World Bank in December 1980.

  24. Steady State Thermal Analysis Lid • Components of Analysis • Outer bucket • Inner bucket • Air as insulation • Waste • Acrylic Lid • Thermal Loads Applied • Insulated at axis of symmetry • Convection along outer bucket side and bottom • Energy Applied to top surface of lid in W Air Axis of symmetry Waste Air Inner bucket Outer bucket

  25. Results of Thermal Analysis 60W applied to top of lid: 50W applied to top of lid: Waste between 62.35 and 71.17 °C Waste between 69.42and 80.01 °C

  26. Results of Thermal Analysis Continued • Using Concrete as support/stand for inner bucket. • Requires a significant amount more of energy to heat the waste to the desired temperature. • Using kconcrete=0.1 W/mK 75W applied to top of lid: Waste between 60.55 and 71.64°C

  27. Updated Risk Assessment

  28. Updated Risk Assessment

  29. Updated Risk Assessment

  30. Updated Risk Assessment

  31. Updated Risk Assessment

  32. MSD II First Steps • Address any outstanding items from the Project Review • Develop a project plan for MSD II • Purchase necessary materials • Initiate contact with those in charge of testing equipment • Begin assembly

  33. Any Additional Questions? Thank You All for Your Time and Feedback

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