1. Cook Stove for Haiti Enhancements System Level Design Review Friday, January 14 th 2011 11:00 AM – 12:30 PM Project 11461

2. Team Members Project Leader Rob Reid (ME) Lead Engineer Jordan Hunter(ME) Team Engineers Alex Seidel (ME) Brian Knight (ME) Mike Lagos (IE)

3. Presentation Overview Project Background Project Overview Work Breakdown Functional Decomposition Customer Needs Engineering Specifications System Architecture System Integration Risk Assessment Design Concepts Project Plan Traditional Cook Stove

4. Project Background The World Health Organization estimates 3 billion people use biomass cooking regularly. Approx. 1.5 million people die each year from stove emissions Our main focus is the people of Haiti who’s main method of cooking is open flame stoves, utilizing charcoal and wood. We are partnering with the H.O.P.E. Organization, which works with the Haitian people to help improve their living conditions and save lives. H.O.P.E. is working with RIT to create an improved cook stove design which is more efficient and less hazardous to its users. Image from feaststl.com shows a basic lump charcoal cooking stove

5. Project Overview Mission Statement Design and construct all mechanical and structural aspects of a thermoelectric biomass cook stove. The stove will utilize a blower/fan powered by thermo-electrics to significantly increase efficiency and reduce fuel consumption and emissions. In comparison with current Haitian stoves, the project stove will have a reduction in emissions and required fuel of 50% Deliverables An improved RIT stove design that has been tested and validated using a working prototype. The improved stove is to reduce fuel use and emissions by more than 50% from traditional Haitian stoves. Build at least two prototype stoves to be sent to Haiti for field testing. Detailed project report. Detailed presentation for Imagine RIT.

6. Work Breakdown * Everyone Participates in Stove Design and Key Design Decisions in each subsystem.

7. Functional Decomposition

8. Customer Needs

9. Engineering Specifications

10. System Architecture

11. System Integration (With Thermo-electric team 11462)

12. Risk Assessment IDRisk ItemEffectCause Likeliho od Severity Importa nce Action to Minimize RiskOwner Describe the risk briefly What is the effect on any or all of the project deliverables if the cause actually happens? What are the possible cause(s) of this risk? L*S What action(s) will you take (and by when) to prevent, reduce the impact of, or transfer the risk of this occurring? Who is responsible for following through on mitigation? 1Material cost too high. Will not be able to be manufactured or marketed in Haiti. Designed with resources unavailable to Haitians. 326Ensure materials are locally available in Haiti.Rob 2Stove not easily repaired.Life of stove can be altered. Designed as a one piece system. 212 Design pieces with a high potential of breaking to be easily removed. Michal 3 Combustion will not begin in stove. Harmful emissions/ less efficient. Improper air flow.133Begin combustion with a fan run by batteries. Alex 4Does not meet emissions goal.Cannot be used indoors.Insufficient stove design.236 Complete combustion of fuel must be obtained. Brian 5 Does not meet high efficiency goal. Stove needs to be redesigned.Insufficient stove design.236Heat transfer to pot must be maximized.Jordan 6 Thermoelectric fan does not supply sufficient supply of air. Forced air system will not work resulting. Analysis of air flow was incorrect. Didn't interact with other teams enough. 133 Theoretical airflow analysis must include potential losses. Jordan 7Stove too heavy and not mobile.Cannot be marketed to vendors. Overlooked customer mobility need. 236Final product must be made of light materials. Michal 8 Insufficient interaction between SD1 Thermoelectric Stove Teams. Stove does not meet needs or specs. Don't consult other teams.224 Maintain consistent communication with other teams. Rob 9 Heat output by stove is not adjustable. Stove will resemble current stoves. Did not take customer needs into consideration. 326 Coordinate with thermoelectric fan group to ensure flow is adjustable. Jordan 10 Stove not properly designed for Haitian customs/ traditions. Haitians will not adopt the new technology for use. Insufficient knowledge of current cooking practices. 236 Pay close attention to customer needs and engineering specs. Brian 11 Cannot be manufactured within Haitian abilities. Stove cannot be built in Haiti. The stove design is too complex. 236Do not overdesign the stove.Michal 12 Materials unavailable for prototype stove. Cannot build or test a stove with the correct materials. Materials are unavailable to us or ordered too late. 224Do not delay in ordering the materials. Team 13Stove design is unstable. Stove will tip over easily and be dangerous to operate. Stove is top heavy or too narrow. 236 Design stove with a large footprint to ensure stability. Michal

13. Benchmarking On average the fuel use was reduced 33%, CO emissions by 75%, and PM emissions by 46% in comparison to the three-stone fire. A light insulative material in the combustion chamber generally resulted in decreased levels of emissions. Use of a pot skirt can reduce fuel use and emissions by an additional 25 – 30%. Rocket Stove Forced air stoves reduce fuel use by an average of 40% over traditional 3 stone fires. Reduces emissions by up to 90% compared to the three-stone fire. Accelerates lighting process Forced Air

14. Concept Development Nordica MacCarty, 2010, Energy for Sustainable Development, testing of fifty cooking stoves, ScienceDirect Stove Comparison

15. Conceptual Designs Design Elements

16. Conceptual Design Vertical Combustion Stove Fan Inlet Skirt Combustion Camber Combustion Air Inlet Gap forces channeling of hot gases Air “pre-heats” before entering combustion chamber. Minimal Heat loss around Pot

17. Project Plan

18. Questions?