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Rochester Institute of Technology P17487: KonTiki Kiln Heat Recovery
System Design Review October 4, 2016 Eta RIT
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Roles and Introductions
Student Engineering Major Role Abby Higgins Industrial Project Manager Leah Matczak Mechanical EDGE Admin Eta Santoro Communications Kelsey Thompson Lead Engineer Thane Vollbrecht Simulation Lead Each Individual Customer: Kathleen Draper Advisor: Bill Nowak Additional Support: Sarah Brownell
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Agenda Problem Statement Developments Adjustments
Functional Decomposition Morphological Table Designs Concept Selection Criteria Pugh Chart Design Selection Benchmarking Design Risks Test Plan Schedule Eta
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Problem Issue Goal Heat from the Kon-Tiki kiln is being wasted
Create a system that can recover the excess heat Repurpose the heat warm water for showers Bonus – Repurpose the heat to pasteurize water Kelsey
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Developments Completed first burn with Kathleen
Collected preliminary temperature data Interviewed Dr. Stevens Helped prioritize design concepts Submitted FMS Report Eta
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Adjustments – Customer Requirements
Group ID Description Priority Purpose CR1 Uses recovered heat for a helpful purpose in a developing country 9 Economics CR2 Costs < $250 to add to the system CR3 Uses local materials and resources 3 Safety CR4 Operated safely by farmer/homeowner CR5 Prevents unintended steam discharge CR6 Operates safely outdoors Ergonomics CR8 Easy to install (minimal steps, lightweight) CR7 Simple to operate by farmer or homeowner Adaptability CR9 Attaches to the existing KonTiki Kiln CR10 Adjustable for different KonTiki models CR12 Adjustable for pit design CR11 Design doesn’t interfere with kiln operations Eta
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Adjustments – Engineering Metrics
ID Source Description Measure Target Accepted E1 CR4 pH level of shower water (Safe for skin contact) pH 7 ±0.5 E2 CR1 Temperature of flame °C E3 CR1, CR11 Temperature of kiln E4 Temperature of output bathing water 65 45 E5 CR6 Temperature of surrounding environment 10-45 20-40 E6 CR2 Total cost of materials $ < $250 E7 CR11 Average burn time Hours < 2 2 E8 CR7 Hours of Training Required 3 E9 CR9, CR10 Kon Tiki kiln diameter (for multiple models) Meters 1< E10 Time to heat the recovery system Minutes <15 <25 E11 CR1, CR5 Heat recovered from working fluid/hour KJ >8000 >4000 E12 Volume of water collected Liters >5 8 E13 CR8 Setup time to add recovery system <30 <45 E14 Operation Steps # <2 <4 E15 CR3 Travel radius for external materials Miles 10 15 E16 Product lifetime Years >2 5 E17 Maximum weight of heat recovery system kg <20 E18 % of materials by cost available within 100 miles % 100 90 E19 People needed to install system 2 or less E20 CR7, CR9 Loading clearance Cubic meters 1 0.75 E21 CR4, CR5, CR6 Potential unprotected burn hazards Eta
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Adjustments – HOQ Eta
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Functional Decomposition
Main Function: Heat Water Explored Function: Collect Heat Eta
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Morphological Chart Kelsey
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Designs Kelsey Also looked into Condenser Hood Cookie Sheet
Boil Pot Above Coil in Kiln Brick Battery Coils Above Kiln Kelsey Also looked into Condenser Hood Cookie Sheet Syn Gas After Burner Hot Tub Bucket in Fire Coil Syn Gas Hybrid Ring Around the Fire Chem Spinner
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Concept Selection Criteria
Safety Feasibility (Materials) Feasibility (Technology) Simplicity of Use Does not Obstruct Kiln Use Cost Effectiveness of Heat Collection Size (Weight) Adaptability to Other Models Set-Up Time Interaction Time Lifetime Thane
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Original Pugh Continue Worth Keeping Eliminate Coils in the Kiln
Thane Continue Coils in the Kiln Hood Collection Hot Tub Worth Keeping Brick Battery Ring Around the Fire Eliminate Syn Gas After Burner Condenser Chem Spinner Bucket in Fire Boil Pot Above Cookie Sheet Coil + Syn Gas Hybrid
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Pugh Chart Round 2 When compared to the Hot Tub…
Thane When compared to the Hot Tub… None of the main options performed better Coil did the best Both of the side options proved to still be effective
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Pugh Chart Round 3 When compared to the Coil…
Thane When compared to the Coil… The Hot Tub was the only main option the performed better Both of the side options proved to still be effective
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Selected Concept Leah
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Selected Concept Leah
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Selected Concept Leah
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Alternative Concepts Leah
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Alternative Concepts Leah
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Alternative Concepts Leah
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Alternative Concepts Leah
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Alternative Concepts Leah
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Preliminary Test Plan Test Last Years Gather data
Make needed adjustments Create a simulation Attempt to model convection Create Prototype Kelsey
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Benchmarking Last Year’s Project Purpose Pasteurize water
Dry tea leaves Method Used a conical coil heat exchanger Issues Water temperature was too inconsistent to pasteurize Abby
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Benchmarking Solar Water Heater – Costa Rica Purpose
Use solar energy to heat water for showers Method Uses gravity to move water from the storage to the heating system Abby
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Benchmarking Solar Water Heater – Conduction Loop Purpose
Heats water by collecting solar energy Method Moves water with a passive convection loop Abby
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Design Risks Abby
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Schedule Abby
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Questions?
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