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Team Solkraft

Team Solkraft. Thomas Buck, Kyle Garner, Alexandra Jung, Quinn Mcgehan , Mark Sakaguchi , and Scott Taylor. Launch Readiness Review 10/7/2010. Mission Overview. Objective To determine the effect of near space conditions on solar cell output. Temperature, light intensity, and altitude.

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Team Solkraft

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  1. Team Solkraft Thomas Buck, Kyle Garner, Alexandra Jung, Quinn Mcgehan, Mark Sakaguchi, and Scott Taylor Launch Readiness Review 10/7/2010

  2. Mission Overview • Objective • To determine the effect of near space conditions on solar cell output. • Temperature, light intensity, and altitude. • Expect to prove that there is a relationship between the variables above and the output of two different types of cells. • Hypothesis • The monocrystalline cells will outperform the polycrystalline cells, while both cells will perform better in near space than on the ground.

  3. Mission Design

  4. Mission Design: How? • Experiment will incorporate three main categories • Photodiodes: Detect light intensity to determine the “amount” of sunlight hitting the panels • Thermistors: On each face to detect temperatures effect on output. • Solar cells: Two different types to determine which one is most efficient • All three components will be flowed into multiplexer • Multiplexer will deliver multiple logs per minute • Arduino will log results to MicroSD card to be uploaded into Excel

  5. Arduino (Velcroed to wall of Balloonsat) HOBO (Velcroed to wall of Balloonsat) Switches Heater Camera Polycrystalline Cell Multiplexer (Later moved to fit directly on top of Arduino) Monocrystalline Cell HOBO External Temp Sensor Photodiode Thermistor

  6. Power Switch Provided Hardware Sensors Solar Cells Mission Design

  7. Testing • Tests performed • All Structure tests • Cold test • Sensor testing: make sure all sensors are putting out reasonable and consistent values. • Integrations test: doing a mission run on the ground to make sure everything is recording • Control Test: starting to analyze which how temperature affects solar cells on the ground. Still need to perform more control tests before launch.

  8. Science Testing General systems test in low light. Readings from one side of the BalloonSat Moved box into the shade

  9. Cold Test Temp (Thermistors)

  10. Cold Test Temp (HOBO) 1 Cold test with dry ice covered Cold test with dry ice uncovered BallonSat Cold test in freezer 3 2

  11. StructureTesting (Drop Test)

  12. StructureTesting (Stair Test)

  13. StructureTesting (Whip Test)

  14. Expected Flight Results • Monocrystalline will produce more voltage than thepolycrystalline solar cells. • Research and initial testing both indicate monocrystalline produces more voltage with a similar surface area.

  15. Expected Flight Results • Both types of solar cells will produce more power in near space due to: • Higher light intensity • Less interference with atmosphere, meaning more photons of light per area hitting the sensors. • Solar cells are less effective at higher temperatures • Higher Carnot efficiency of the cell • Assuming lower temperature and higher light intensity increase voltage output, we can determine which has greater affect by seeing whether the peak voltage is in the tropopause or at maximum altitude.

  16. Biggest Worries • The Biggest Worries Of Team Solkraft Are… • Camera failure incl. camera fogging up • Hardware failure i.e. solar panels breaking • Lack Of Sleep

  17. Mission Requirements (Level 0)

  18. Mission Requirements (Level 1)

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