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

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) Problem Definition Customer Needs and Specs Concept Development Concept Selection Feasibility Risks and Risk Assessment Schedule

4. Feedback We are Looking for from This Review Alternative design concepts Feasibility of materials 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 must be made of materials available in Haiti and be easy to use.

6. Customer Needs/Design Specifications Engineering Specification Derived from Customer Need Relative Importance Description Measure of Performance Engineering UnitsMarginal ValueIdeal Value ES1CN2, CN119 Provide heat to waste using solar energy in order to kill pathogens Temperature, Time °F, hours122°F, 1 week ES2CN49 Vent combustive gases in order to prevent explosions and smell Amount of methane inside chamber ppm50,000 Less than 30,000 ES3CN1, CN49 Contain pathogens, do not allow unsafe leakage of untreated wastes Is there leakage? Binary (Yes/No)No ES4CN49 Temperature of the access door (or handle of the access door) Temperature°F120°F Less than 100 °F ES5CN1, CN59 The product must be able to withstand an outdoor environment IEC60529* digit 2 Level 0-8 Binary (Yes/No) ES6CN1, CN53 The product must be able to withstand an outdoor environment Does the product withstand outdoor wind mph20 mph25 mph ES7CN4, CN7, CN83 Customer must be able to easily add, stir (optional) and remove waste Time to add, stir and remove material minutes15 minutes less than 5 minutes ES8 CN12, CN7, CN9, CN11 3Volume of product accommodatedVolumeLiters 1L per person per day* and cover material ES9CN29 Does the entire sample of human waste contain safe pathogen levels? Test for temperature and E. coli (if using manure) See attached table. Refer to Humanure Handbook for more details ES10CN131Shows disinfection has taken place Yes

7. Key Specifications Provide heat to waste Vent combustive gases Contain pathogens Temperature of access door (Safe handling) Environmental durability Safe Easy to use Use local resources Destroy all pathogens Reusable Easy to maintain

8. Functional Analysis

9. Systems Architecture

10. Concept Development: Morph Chart

11. System Concepts 1.Pot on stand, heat from top and bottom 2.Box on stand with drawer, heat from top and bottom 3.Double box on group, heat from top and reflectors 4.Bare minimum option: hole in ground, direct sunlight only 5.Expensive option: box with drawer, solar panels, insulation 6.Complex option: heat exchanger, heated from reflectors and top

12. The Datums Capetown Project – Tin box w/ tray – Pasteurized human waste in 6 hours using direct sunlight CooKit – Cheap (~$25 USD) – Pot in bag sitting on mirrors – Not user friendly

13. Datum 1: Pugh Chart Concepts Selection CriteriaWeightDatum 1123456 Mechanical Simplicity ---+-- Input Simplicity SSS+SS Biproduct Containment SSS--S Feces Containment +S+-SS Heating Simplicity ---S-- Power Output2 +++S++ Time of Completion2 ++++++ Ability to Maintain Temperature SSS-SS Output Simplicity SSS-SS Biproduct Removal S----- Excess Buildup Removal SSSSSS Heat Protection +++-++ Protection from Edges +SS+SS Durability ---+-- Cost ---+-- Sum (+)'s 756755 Sum (S)'s 676367 Sum (-)'s 455665 Net Score 30110 Rank 142264

14. Datum 2: Pugh Chart Concepts Selection CriteriaWeightDatum 2123456 Mechanical Simplicity -SS+SS Input Simplicity SSS+SS Biproduct Containment +++-++ Feces Containment SSS-SS Heating Simplicity -SS+S- Power Output2 +++-++ Time of Completion2 +++-++ Ability to Maintain Temperature SSS-SS Output Simplicity +++S++ Biproduct Removal S-S--- Excess Buildup Removal SSSSSS Heat Protection ++S-++ Protection from Edges S--+-- Durability -SS+SS Cost ---+-- Sum (+)'s 776677 Sum (S)'s 679276 Sum (-)'s 432934 Net Score 344-343 Rank 411614 Average Rank2.5 1.543.54 NET Rank221646

15. Concept Selection Concept 1 Pugh Chart Rating: 2 Concept 2 Pugh Chart Rating: 2 Concept 3 Pugh Chart Rating: 1 Pot raised above ground in a stand – removable. Heated from direct sunlight to top and reflected onto bottom. Removable lid for input/output. Gasses vented. Box raised above ground in a stand Heated from direct sunlight to top and reflected onto bottom. Removable drawer for input/output. Pressure relief valve to eliminate gasses. Box inside of a box Heated from direct sunlight to top and reflected from side flaps. Removable lid and inner box.

16. Feasibility Estimated Mass of Waste to be Heated, m1.134kg Specific heat of Water, Cp4183J/(kgK) Initial Temperature, T initial 25C Time for Pastuerizing [hrs] Final Temp [C] Delta Temp [K] Time to reach Temp [s] Q [J] q [W] 160353600166023.2746.12 1053283600132818.6236.89 2450253600118588.0532.94

17. 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 303 days will meet our needs

18. Risks and Risk Assessment

21. Schedule

22. Schedule Task List

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