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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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Presentation Transcript

P12441: Thermoelectric Power Pack for Next Generation Stove

  • Andrew Phillips – Project Manager

    Colin McCune – Lead Engineer

    Lauren Cummings – Electrical Engineer

    XiaolongZhang – Cost Engineer


Background
Background

  • 3 billion people use open fires and inefficient stoves regularly

    • Requires large amounts of fuel

      • Damage to ecosystem


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


Need for power
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


Customer needs
Customer Needs

*Most important needs

Importance Scale: 1 - Low Importance, 2 - Moderate Importance, 3 - High Importance


Engineering specifications
Engineering Specifications

*Most important needs

Importance Scale: 1 - Low Importance, 2 - Moderate Importance, 3 - High Importance


Engineering specifications cont
Engineering Specifications cont.

*Most important needs

Importance Scale: 1 - Low Importance, 2 - Moderate Importance, 3 - High Importance


Engineering specifications cont1
Engineering Specifications cont.

*Most important needs

Importance Scale: 1 - Low Importance, 2 - Moderate Importance, 3 - High Importance


System architecture
System Architecture

Maximum Power Point Tracker (MPPT) Network

Power Storage and Distribution


MPPT

Maximum Power Point Tracker (MPPT) Network


Maximum Power Point Tracker (MPPT)

  • Allows efficient power transfer from TEG to system


Power distribution
Power Distribution

Power Storage and Distribution


Battery management
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


Battery protection s ystem

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)


Cat procedure
CAT Procedure reaches 5.8 V

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.


Customer acceptance test cat bench setup
Customer Acceptance Test (CAT) reaches 5.8 VBench Setup

A

A

A

A





Project status
Project Status reaches 5.8 V

*Most important needs

Importance Scale: 1 - Low Importance, 2 - Moderate Importance, 3 - High Importance


Project status cont
Project reaches 5.8 VStatus cont.

*Most important needs

Importance Scale: 1 - Low Importance, 2 - Moderate Importance, 3 - High Importance


Project status cont1
Project Status cont. reaches 5.8 V

*Most important needs

Importance Scale: 1 - Low Importance, 2 - Moderate Importance, 3 - High Importance


Project status cont2
Project Status cont. reaches 5.8 V

*Most important needs

Importance Scale: 1 - Low Importance, 2 - Moderate Importance, 3 - High Importance


Future work
Future Work reaches 5.8 V

  • 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.


Questions
Questions? reaches 5.8 V


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