Rochester Institute of Technology P17487: KonTiki Kiln Heat Recovery First Design Review September 8, 2016 RIT

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 Customer: Kathleen Draper Advisor: Bill Nowak Additional Support: Sarah Brownell

Current Product KonTiki Low cost kiln for producing biochar Various models and sizes Runs hotter than necessary for biochar production Heat Recovery No heat recovery devices on the market for KonTiki Kilns Independent user: heat recovery for studio Primary Purpose Heat water for showers Thane

Problem Statement Current State Hood used to dry tea leaves Coil used to heat water to pasteurization temperatures Hood used to heat workshop Desired State Heat water for showers Project Goals Simple design and use Safe to use Constraints Use cheap and locally available materials Thane

Additional Deliverables A system that produce water hot enough for bathing Functioning Prototype Bill of Materials User Guide Thane

Constraints Must attach to current KonTiki models Setup and operation must be simple tasks Must not hinder biochar production Materials must be readily available in developing nations Must cost less than $250

Stakeholders Kathleen Draper Ithaka Institute KonTiki users in developing nations

Use Case

Customer Requirements Group ID Description Priority (Highest-5 Lowest-1 Purpose CR1 Uses recovered heat for a helpful purpose in a developing country 5 Economics CR2 Costs < $250 to add to the system CR3 Uses local materials and resources 4 Safety CR4 Operated safely by farmer/homeowner CR5 Prevents unintended steam discharge CR6 Operates safely outdoors Ergonomics CR7 Simple to operate by farmer or homeowner 3 CR8 Easy to install (minimal steps, lightweight) Adaptability CR9 Attaches to the existing KonTiki Kiln CR10 Adjustable for different KonTiki models CR11 Design doesn’t interfere with kiln operations CR12 Adjustable for pit design 2

Engineering Requirements 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 650-750 600-800 E3 CR1, CR11 Temperature of kiln 450-550 400-600 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 Kelsey

House of Quality Abbey

Benchmarking Last Year’s System Serbia KonTiki Designed Purpose: Pasteurize water Dry tea leaves Method: Coils Heat exchanger Major Issues: Produced unwanted steam Inconsistent temperatures Designed Purpose: Heat a room Method: Low hood system over kiln Heat exchanger Major Issues: Kiln has to be continuously running to be effective Abbey

Risk Analysis Abbey

Risk Analysis Summary Technical Inconsistencies with the heat recovered Recovery system isn’t adaptable Safety Burns from the flame Burns from the kiln Water becomes too hot and burns user Excessive steam is unexpectedly produced Resources No available testing location on campus Weather-dependent Environment Produces harmful gases Abbey

Schedule Abbey

Questions?