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Cover Your A$$ets Solar Panel Protection

Cover Your A$$ets Solar Panel Protection. Project Team: Krista Miller Sohaib Hasan John Helme. Excellent background to the application.

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Cover Your A$$ets Solar Panel Protection

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  1. Cover Your A$$etsSolar Panel Protection Project Team: Krista Miller Sohaib Hasan John Helme

  2. Excellent background to the application • The solar panels at the VTC Alternative Energy Building use ethylene glycol as the thermal conductor. Ethylene glycol will begin to break down at temperatures near 250°F.

  3. Clear Identification of the Problem • Problem: The temperature of the ethylene glycol in the solar panels must not exceed 250°F. • Solution Constraints: • Must work on any number of panels. • Must have both an automatic and manual control. • Have a maximum cost of $200 per panel.

  4. Solution Statement Blinds or screens will be automatically positioned to cover a solar panel before the panel temperature reaches a critical level. Each panel will have an complete and independent blind system. The blind system for multiple panels can be controlled by a single override control.

  5. Power Manual Override Microcontroller M Motor Controller Complete System Diagram Position Sensors 1-3 Temp Sensor Increment Motors

  6. Excellent Mechanical System Diagrams Above is a picture of how the solar panel cover will be mounted on the existing panels.

  7. Cover • Heavy Duty Premium White Tarp • 6 oz per Square Yard • 1200 Denier • UV Treated For Longer Protection • 12 Mil Thickness • 14x14 Weave Count • Water-resistant • Rot-proof • Dust-proof.

  8. DC Motors & Motor Driver: • Motor • Denso 730557-7030 • 12V, 3.3A • 163 RPM • 100 oz in torque • Motor Driver • H Bridge

  9. Excellent Temperature Sensing Diagram • Type K Thermocouple • Self Powered • Simple • Rugged • Inexpensive • Wide Temperature Range • Thermocouple Processing/Conditioning

  10. Excellent Electronics Overview • Microcontroller • Freescale HCS08 • 10bit A2D converter • Ease of use • Inexpensive • Available Code • Position Switches • SPST Momentary Roller Switch Open Limit Switch (in back) Covered Limit Switch Mid Position Limit Switch

  11. Excellent State Diagram Sensors Sensor Variable Panel open pos.open Panel 1/2 open pos.hw Panel closed pos.clsd Temperature temp Motor close Motor open p.open<>1 or.open=1 or.open=1 or temp<s.open.ref else p.open=1 Override Controls Control Variable Open or.open Close or.clsd or.clsd=1 temp>s.close.ref pos.hw=1 pos.hw = 0 pos.clsd=1 Reference Variables Standard close temperature s.close.ref Critical close temperature c.close.ref Standard open temperature s.open.ref These values will be set using potentiometers on the controller circuit. temp>s.clos.ref or temp>c.clos.ref or or.clsd=1 temp<s.open.ref else else Start 0 0 Open0 0 1 Idle1 0 0 Idle 0 0 0 Idle½ 0 0 Close 1 0 Close½ 1 0 Start 0 0 else else Open½ 0 1

  12. Budget for Major and Minor Components

  13. Informative Schedule, Balanced Personnel Assignments, Milestones

  14. Excellent Summary • Solution: Solar panels will be automatically covered when the temperature of the ethylene glycol reaches 220°F. • Solution Constraints: • Controller and motor for each panel. • Open, close and power off override controls. • Demonstration system estimated cost of $185. • Problem: The temperature of the ethylene glycol in the solar panels must not exceed 250°F. • Solution Constraints: • Must work on any number of panels. • Must have both an automatic and manual control. • Must have a maximum cost of $200 per panel.

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