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The Team Formerly Known as NREL 2

The Team Formerly Known as NREL 2. Ryan Manning Eric Simley Arvind Talukdar. Presentation Outline. Solar Tracker/DE2 Development Project Objectives Approach Implementation of Subsystems Logistics Risks Extensions NREL 2 Overview Objectives Status. Objectives.

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The Team Formerly Known as NREL 2

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  1. The Team Formerly Known as NREL 2 Ryan Manning Eric Simley Arvind Talukdar

  2. Presentation Outline • Solar Tracker/DE2 Development Project • Objectives • Approach • Implementation of Subsystems • Logistics • Risks • Extensions • NREL 2 • Overview • Objectives • Status

  3. Objectives • Problem: relative movement of the sun limits the amount of normally incident light the solar panels receive, thus restricting absorbed energy • Solution: implement a low-cost peak power tracker that maintains normal incidence with the light for optimum energy conversion

  4. Objectives (cont.) • Develop and document the Altera DE2 board for potential use in ECE courses

  5. Outline of Approach Mouse USB I/O Altera DE2 Board I/O Stepper Motors/ Mechanical Apparatus Solar Panel/ Battery Apparatus Keyboard USB I/O VGA Photodetectors Monitor/Interface

  6. Implementation of Subsystems: Photosensors • Light absorbed by arrays of photo-sensors mounted on circuit boards • Localized angle where intensity is strongest will be detected by the processor. Once the angle of strongest intensity is detected, system will adjust position of solar panel so light is normal to panel. Photo-detector Arrays Solar Panel

  7. Photosensors (cont.) • Photodiodes: • Less expensive • More Linear • Bias • Phototransistors: • Built in Gain, no pre-amp required

  8. Stepper Motors • SureStep Bipolar Stepper Motor • 10.38 lb-in • 1.8degree step size

  9. Photovoltaic Cell/Battery • PowerUp BSP 1012 PV Cell • Max Voltage 17.3V • Max Current .58A (10W) • 1.2 Square Feet/4.2 lbs • B B Battery 12V 7AHr lead-acid battery

  10. I/O Header Pins • 72 Cyclone II I/O pins connected to two 40 pin headers along with 5v, 3.3v, and GND • Used for Photosensors, Motors, and Power Meter

  11. VGA • Used to display power information to the user • 10 bit Video DAC included on board

  12. USB • Used to control keyboard input • Onboard USB controller chip • Drivers included in DE2 documentation

  13. Division of Tasks • Hardware • Stepper motor mounting apparatus – Ryan Manning • Photosensor array – Eric Simley • Solar Panel & Battery – Arvind Talukdar • Stepper Motor Driver – Everyone • Software • USB – Arvind Talukdar • VGA – Eric Simley • I/O – Ryan Manning • Application/Integration – Everyone

  14. Schedule

  15. Risks and Contingencies • Risk: VGA output is inoperable • Solution: Use onboard LCD to display critical information • Risk: USB input fails to work properly • Solution: No user input available

  16. Extensions • SD card support • Data storage • USB mouse drivers • More advanced user interface • Second stationary solar panel • Used as a comparison to the tracking panel

  17. Bill of Materials

  18. NREL 2 • Objective: Create bearing test stand to help diagnose bearing failures in wind turbine gear boxes • Status: NREL budget on hold in congress, currently implementing proof of concept test stands, developing LabView acquisition software

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