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P12441: Thermoelectric Power Pack for Next Generation Stove

P12441: Thermoelectric Power Pack for Next Generation Stove. Andrew Phillips – Project Manager Colin McCune – Lead Engineer Lauren Cummings – Electrical Engineer Xiaolong Zhang – Cost Engineer. Background. 3 billion people use open fires and inefficient stoves regularly

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P12441: Thermoelectric Power Pack for Next Generation Stove

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  1. P12441: Thermoelectric Power Pack for Next Generation Stove • Andrew Phillips – Project Manager Colin McCune – Lead Engineer Lauren Cummings – Electrical Engineer XiaolongZhang – Cost Engineer

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

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

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

  5. Customer Needs *Most important needs Importance Scale: 1 - Low Importance, 2 - Moderate Importance, 3 - High Importance

  6. Engineering Specifications *Most important needs Importance Scale: 1 - Low Importance, 2 - Moderate Importance, 3 - High Importance

  7. Engineering Specifications cont. *Most important needs Importance Scale: 1 - Low Importance, 2 - Moderate Importance, 3 - High Importance

  8. Engineering Specifications cont. *Most important needs Importance Scale: 1 - Low Importance, 2 - Moderate Importance, 3 - High Importance

  9. System Architecture Maximum Power Point Tracker (MPPT) Network Power Storage and Distribution

  10. MPPT Maximum Power Point Tracker (MPPT) Network

  11. Maximum Power Point Tracker (MPPT) • Allows efficient power transfer from TEG to system

  12. Power Distribution Power Storage and Distribution

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

  14. USB and Fan disconnect from battery when terminal voltage reaches 5.8 V Battery Protection System Battery disconnect from MPPT and TEG when terminal voltage reaches 6.4 V The voltage at the terminal of the switch (yellow) and the voltage at the input to the switch (blue)

  15. CAT Procedure Step 1: Connect battery and power on circuit. Step 2: Run system until USB is disabled. Step 3: Run system until fan is disconnected. Step 4: Attach power pack to TEG. Step 5: Run system until powered by TEG, Step 6: Run system until fan is reconnected. Step 7: Run system until USB is re-enabled. Step 8: Run system until battery is disconnected. Step 9: Disconnect power pack from TEG. Step 10: Connect cell phone to USB output. Step 11: Charge cell phones until USB is disconnected. Step 12: Power off power pack.

  16. Customer Acceptance Test (CAT)Bench Setup A A A A

  17. The output power of the various systems sinks and sources.

  18. The voltages at the various voltage sources of the system

  19. The currents of the various systems

  20. Project Status *Most important needs Importance Scale: 1 - Low Importance, 2 - Moderate Importance, 3 - High Importance

  21. Project Status cont. *Most important needs Importance Scale: 1 - Low Importance, 2 - Moderate Importance, 3 - High Importance

  22. Project Status cont. *Most important needs Importance Scale: 1 - Low Importance, 2 - Moderate Importance, 3 - High Importance

  23. Project Status cont. *Most important needs Importance Scale: 1 - Low Importance, 2 - Moderate Importance, 3 - High Importance

  24. Future Work • Complete design and implementation of the MPPT. • Decrease system cost. • Increase the efficiency of the DC-DC converters. • Complete system PCB layout, and have PCB layout. • Manufacture and test enclosure. • Send system to Haiti for field testing.

  25. Questions?

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