Thermoelectric Power Pack for Next Generation Stove Andrew Phillips Colin McCune Lauren Cummings Xiaolong Zhang

Outline o Background o Stove Integration o Design Overview o Future Work o Questions

Background o 3 billion people use open fires and inefficient stoves regularly o Requires large amounts of fuel o Damage to ecosystem

Haiti o Deforestation o Soil erosion o Decrease in agricultural yields o Landslides o Running out of fuel o Need for more fuel-efficient stoves o Add oxygen to combustion process Haiti Dominican Republic

Need for Power o Haiti has a history of destructive earthquakes o No power grid and no landlines o Cell phones and radios for communication o Difficult to charge

Thermoelectric Generator (TEG) o Seebeck Effect: A temperature difference can be directly converted into a source of electricity o Heat from fire o Cool air from fan

Stove Integration Fan TEG

System Architecture o Maximum efficiency o Minimal cost o Simple to operate Maximum Power Point Tracker (MPPT) Network Power Distribution

MPPT Maximum Power Point Tracker (MPPT) Network

Maximum Power Point Tracker (MPPT) o Allows efficient power transfer from TEG to system Divide-by-2 Network Timing Circuit Boost Converter

MPPT Operation Open circuit TEG voltage (Purple) and the output of the divide-by-2 network (Red)

Power Distribution

o The battery must always have enough power to run the system during start- up o To prevent overdraw o First USB is disabled o Then fan is disconnected o To prevent overcharging o System will stop charging battery Battery Management

Future Work o Partnered with H.O.P.E. For Haiti o Stoves will be sent to Haiti for testing o Future iterations will focus on o Increasing efficiency o Lowering system cost o Increasing durability

Come See Our End Result! We Are Here! Infinity Quad Engineering Building Quarter Mile

Questions?