By: Kevin LaFevers, Anthony Sabatino, Xiaoming Liang, Richard Wilson

1. Recognize the Need 2. Problem Statement 3. Mission Statement 4. Customer Needs Assessment 5. Design Specifications 6. Design Aspects 7. Design Ideas 8. Decision Matrix 9. Final Design 10. Cost Analysis 11. Summary

 We recognize the need to provide a stove system that is safe and can be used by the majority of third world countries

 Current cooking systems are inefficient and harmful to users who inhale smoke while cooking indoors  Must be cheap  Limited resources

 We intend on creating a low cost, sustainable, and culturally appropriate cooking system for use by the poor and marginalized people in the developing world.

 Objectives  Durable  Well insulated  Efficient  Safe  Locally made  Made of local materials

 Constraints  Cheap  Low emissions  Simple design  Similar in size to current models  Features  Simple fuels  Ability to Upgrade

 The stove must cost less than $20 (U.S.)  It must be able to heat a quart water to 100 degree Celsius in under 10 minutes  It must emit 50% less than current stove systems  It must use 50% less fuel

 Materials were decided upon with efficiency and cost in mind  Insulation material for designs will be a clay shell filled with ash  Ceramic material will be used as a sturdy insulator  A steel shell will enclose the stove for protection

 This design features a “bowl-shaped heat exchanging surface” which provides high heat exchange rate and therefore high efficiency, which saves a lot of energy.

 Uses a simple ceramic pipe as a center  A bowl shaped pot is used for maximum heat transfer  A steel casing is used around the clay  Steel supports are used to lift the bowl off of the stove for ventilation

 The heat exchange area is cone shaped to increase the heat transfer  Steel supports are used to lift the pot away from the body of the stove to increase airflow  Steel casing for protection

Design 1Design 2Design 3 Initial Cost x3443 Efficiency x5235 Ease of Manuf. x4443 Portability x1444 Ease of Use x3333 Safety x3555 Total667174

 12” in diameter, 18” high  3” Clay shell filled with ash  ½” thick ceramic inner combustion chamber  1/8” Steel outer shell wrapped around the clay  Fuel pellets

 Scrap steel is approximately $.10 per pound  Clay is approximately $.25 per pound  Ceramic chamber is approximately $1.00 per pound  Cost of ash insulation is negligible  In total, steel will be about $1, $3 for clay, $2 for ceramic  Final material cost will be around $6

 We feel this stove system will provide a low cost, sustainable, and safe alternative to currently available systems  The design is simple and utilizes locally available materials, which will allow unskilled workers to manufacture and repair it

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