P12441: Thermoelectric
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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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P12441: Thermoelectric Power Pack for Next Generation Stove

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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

    XiaolongZhang – Cost Engineer


Background

Background

  • 3 billion people use open fires and inefficient stoves regularly

    • Requires large amounts of fuel

      • Damage to ecosystem


P12441 thermoelectric power pack for next generation stove

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


P12441 thermoelectric power pack for next generation stove

MPPT

Maximum Power Point Tracker (MPPT) Network


P12441 thermoelectric power pack for next generation stove

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

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)Bench Setup

A

A

A

A


The output power of the various systems sinks and sources

The output power of the various systems sinks and sources.


The voltages at the various voltage sources of the system

The voltages at the various voltage sources of the system


The currents of the various systems

The currents of the various systems


Project status

Project Status

*Most important needs

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


Project status cont

Project Status cont.

*Most important needs

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


Project status cont1

Project Status cont.

*Most important needs

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


Project status cont2

Project Status cont.

*Most important needs

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


Future work

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.


Questions

Questions?


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