1 / 24

Peltier Solar Concentrator

Peltier Solar Concentrator. By: Michael Forrest Kyle Fifield Evan White. The Problem. To demonstrate that a thermoelectric device can efficiently converted solar energy into electricity. The goal is to create a system equally efficient to PV panels or even more efficient. The Solution.

lamar
Download Presentation

Peltier Solar Concentrator

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Peltier Solar Concentrator By: Michael Forrest Kyle Fifield Evan White

  2. The Problem • To demonstrate that a thermoelectric device can efficiently converted solar energy into electricity. • The goal is to create a system equally efficient to PV panels or even more efficient.

  3. The Solution • Satellite Dish Sun Concentrator • Collector Plate • Thermal Electric Peltier Device • Azimuth-Altitude Solar Tracking • Battery Storage

  4. What is a Thermoelectric Device? • A thermoelectric “Peltier” device uses a seebeck effect to create power. • The seebeck effect uses the temperature differential to create a magnetic field which current can flow through

  5. Sun System Diagram Solar Rays Solar Concentrator Motor Controller Motor Controller Horizontal Tilt Microcontroller Peltier Device Solar Collector Dc/Dc Step-up Azimuth Rotation

  6. Solar Tracking Subsystem • Time of day tracks time • User interface will include buttons and 7-segment display • Motor controllers • 2 motors • Encoders will be used to keep track of how many turns the motors rotate.

  7. Solar Tracking System Diagram

  8. Solar Tracking Positioning Equations Elevation (zenith) Angle = Azimuth Angle = • Inputs • Date and Time • Longitude and Latitude

  9. User Interface • Displays: • Time of Day • Date • Azimuth Angle • Altitude Angle • Pushbuttons: • Up/Down Selection Arrows • Menu Option • Enter Button

  10. Azimuth Motor Mechanism Dish -Encoder 16 pulses/rev 360deg/16 pulses = 22.5degs/pulse -Encoder with Sprockets 1 to 7.5 sprocket ratio (22.5deg/pulse)*(1/7.5)= 3deg/pulse Encoder E 7.5 1 Base

  11. Thermoelectric Mounting Subsystem • Purpose: • Maximize Performance and Power Efficiency of HZ-20. • HZ-20 Module Around 5% Efficient. • Design Aspects: • Minimum Load of 200 psi on HZ-20. • Thermal Expansion of HZ-20. • Efficient Heat Transfer • Keeping Cold Side of HZ-20 Cool.

  12. Subsystem Diagram of Thermoelectric Mount

  13. Loading on HZ-20 Module • Ensures Module Remains in Compression to Maximize Heat Transfer. • Solution: • Belleville Springs. • Apply Large Amount of Force in Compact Area. • Also Allows for Thermal Expansion.

  14. Efficient Heat Transfer • Thermal Grease: • Ensures Efficient Heat Transfer from Mount to HZ-20 and HZ-20 to Heat Sink. • Overhang of 0.5 Inches and 0.25 Inches of Thickness on Mount: • Ensures Uniform Heating on HZ-20.

  15. Thermal Diagram TBar Temperature of Bar TH Temperature of Hot Side Thermal Resistance of Thermal Adhesive Thermal Resistance of Peltier Junction ∆T TC Temperature of Cold Side THS Temperature of Heat Sink Thermal Resistance of Heat Sink TA Temperature of Ambient

  16. Energy Gain B AreaEclipes= πAB A Area of Dish = 0.303077m² Area of FP = 0.003488m² Energy Gain = Area of Dish / Area of Focal Point Energy Gain = 87

  17. Efficiency Strategies 85% Reflectivity Dish Covered with Reflective Tape Absorbs 90% of light Aluminum Collector Plate Painted Black

  18. Efficiency Diagram Sunlight to Usable Energy Sun Reflective Tape 85% Efficient 5% Heat to Electricity Efficiency 90% Absorption Efficiency Wasted Heat Step-up Dc/Dc Converter 95% Efficient 12v Lead Acid Total Efficiency = 3.34% 92% Storage Efficiency

  19. Power Diagram Sun 8 mins to heat up Collector Concentrator 1000W/m² Heat Sink Peltier Device 303.1W 232W 220W 3V, 6.67A, 20W Dc/Dc Step-up 12V, 800mA, 9.6W

  20. Dc/Dc Step-up Convertor 1.8V to 5.5V

  21. Areas of Responsibility Evan Kyle Mike Solid Modeling / Peltier Mounting / Temperature Sensing Energy & Power Calculations/ Thermal Design/ Dc-Dc Step-Up Circuit Solar Tracking/ Time of Day Sensor Calculations & Programming/ Motor controllers

  22. Schedule • Things to be done • Design altitude motor mechanism • Build azimuth and altitude motor mechanism • Get final dimensions and mount HZ-20 on heat sink • Order parts • Troubleshoot TOD programming, finish coldfire calculation programming, design user input program, add motor driver program

  23. Questions?

More Related