high temperature waste pasteurizer
DESCRIPTION
P13411. High Temperature Waste Pasteurizer. Brian Kilger Kyle Cohn Kyle Weston Stephanie Mauro. Parabolic curve. The Team. Kyle Weston- Team Leader Stephanie Mauro- Thermal Engineer Kyle Cohn- Alternative Energy Engineer Brian Kilger - Materials Engineer. Agenda. - PowerPoint PPT PresentationTRANSCRIPT
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High Temperature Waste Pasteurizer
Brian KilgerKyle Cohn
Kyle WestonStephanie Mauro
Parabolic curve
P13411
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The Team
Kyle Weston- Team Leader
Stephanie Mauro- Thermal Engineer
Kyle Cohn- Alternative Energy Engineer
Brian Kilger- Materials Engineer
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Agenda
• Feedback (expectations and priorities for review)• Problem Definition• Customer Needs and Specs• Concept Development• Concept Selection• Feasibility• Risks and Risk Assessment• Schedule
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Feedback We are Looking for from This Review
• Alternative design concepts
• Feasibility of materials
• Compatibility of our ideas with Haiti
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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.
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Customer Needs/Design SpecificationsEngineering Specification
Derived from Customer Need
Relative Importance Description Measure of
Performance Engineering Units Marginal Value Ideal Value
ES1 CN2, CN11 9 Provide heat to waste using solar energy in order to kill pathogens
Temperature, Time °F, hours 122°F, 1 week
ES2 CN4 9 Vent combustive gases in order to prevent explosions and smell
Amount of methane inside chamber
ppm 50,000 Less than 30,000
ES3 CN1, CN4 9 Contain pathogens, do not allow unsafe leakage of untreated wastes
Is there leakage? Binary (Yes/No) No No
ES4 CN4 9 Temperature of the access door (or handle of the access door) Temperature °F 120°F Less than 100
°F
ES5 CN1, CN5 9 The product must be able to withstand an outdoor environment IEC60529* digit
2 Level 0-8Binary (Yes/No)
ES6 CN1, CN5 3 The product must be able to withstand an outdoor environment
Does the product withstand outdoor wind
mph 20 mph 25 mph
ES7 CN4, CN7, CN8 3Customer must be able to easily add, stir (optional) and remove waste
Time to add, stir and remove material
minutes 15 minutes less than 5 minutes
ES8 CN12, CN7, CN9, CN11 3 Volume of product accommodated Volume Liters
1L per person per day* and cover material
ES9 CN2 9Does 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
ES10 CN13 1 Shows disinfection has taken place Yes
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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
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Functional Analysis
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Systems Architecture
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Concept Development: Morph Chart
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System Concepts
1. Pot on stand, heat from top and bottom2. Box on stand with drawer, heat from top and bottom3. Double box on group, heat from top and reflectors 4. Bare minimum option: hole in ground, direct sunlight
only5. Expensive option: box with drawer, solar panels,
insulation6. Complex option: heat exchanger, heated from
reflectors and top
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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
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Datum 1: Pugh Chart ConceptsSelection Criteria Weight Datum 1 1 2 3 4 5 6Mechanical Simplicity - - - + - -Input Simplicity S S S + S SBiproduct Containment S S S - - SFeces Containment + S + - S SHeating Simplicity - - - S - -Power Output 2 + + + S + +Time of Completion 2 + + + + + +Ability to Maintain Temperature S S S - S SOutput Simplicity S S S - S SBiproduct Removal S - - - - -Excess Buildup Removal S S S S S SHeat Protection + + + - + +Protection from Edges + S S + S SDurability - - - + - -Cost - - - + - -Sum (+)'s 7 5 6 7 5 5Sum (S)'s 6 7 6 3 6 7Sum (-)'s 4 5 5 6 6 5Net Score 3 0 1 1 -1 0Rank 1 4 2 2 6 4
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Datum 2: Pugh Chart ConceptsSelection Criteria Weight Datum 2 1 2 3 4 5 6Mechanical Simplicity - S S + S SInput Simplicity S S S + S SBiproduct Containment + + + - + +Feces Containment S S S - S SHeating Simplicity - S S + S -Power Output 2 + + + - + +Time of Completion 2 + + + - + +Ability to Maintain Temperature S S S - S SOutput Simplicity + + + S + +Biproduct Removal S - S - - -Excess Buildup Removal S S S S S SHeat Protection + + S - + +Protection from Edges S - - + - -Durability - S S + S SCost - - - + - -Sum (+)'s 7 7 6 6 7 7Sum (S)'s 6 7 9 2 7 6Sum (-)'s 4 3 2 9 3 4Net Score 3 4 4 -3 4 3Rank 4 1 1 6 1 4
Average Rank 2.5 2.5 1.5 4 3.5 4NET Rank 2 2 1 6 4 6
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Concept SelectionConcept 1
Pugh Chart Rating: 2Concept 2
Pugh Chart Rating: 2Concept 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.
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Feasibility [J]
[W]
Estimated Mass of Waste to be Heated, m 1.134 kgSpecific heat of Water, Cp 4183 J/(kgK)Initial Temperature, Tinitial 25 C
Time for Pastuerizing
[hrs]Final Temp
[C]Delta
Temp [K]Time to reach
Temp [s]Q[J]
q[W]
1 60 35 3600 166023.27 46.12
10 53 28 3600 132818.62 36.89
24 50 25 3600 118588.05 32.94
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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
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Risks and Risk Assessment
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Risks and Risk Assessment
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Risks and Risk Assessment
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Schedule
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Schedule Task List
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Any Additional Questions?
Thank You All for Your Time and Feedback