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The Green Pyranometer

The Green Pyranometer. By Jeff Green ELT2720 4/10/2013. Definition. “A pyranometer is a sensor that measures the total global solar irradiance in a hemispherical field of view(Dunlop). ”. Solar Irradiance.

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The Green Pyranometer

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  1. The Green Pyranometer By Jeff Green ELT2720 4/10/2013

  2. Definition “A pyranometer is a sensor that measures the total global solar irradiance in a hemispherical field of view(Dunlop). ”

  3. Solar Irradiance “ Solar irradiance is the power of solar radiation per unit area. Solar irradiance is commonly expressed in units of watts per square meter(W/m^2) or kilowatts per square meter (kW/m^2)(Dunlop).”

  4. Features • Accurate  • Portable   • Efficient Battery Use  • Easy to use interface    • Data storage  • Serial to USB computer connection 

  5. Specifications • Store 200+ Data points • Insolation Range from 0 – 1300 W/m2 • 3” x 5” meter with 1” x 2” sensor module • Runs on 2-AA Batteries

  6. System Diagram

  7. Block Diagram

  8. Schematic

  9. Sensor Components Photodiode Resistor Battery

  10. PDB-C139 Photodiode How it is Used Reverse bias Shine light on it Measure the voltage Convert to P/W^2 Potential Issue: Light spectrum sensitivity

  11. Important Components • M9S08QG8 - 1000 @ $0.77 each • Max3232 - $4.64 per unit • LMC7660 - 0.39340 per unit • LCD Screen - $7.23 per unit • PDB-C139 - $4.74 per unit • Assorted Capacitors and Resistors

  12. Final Product $92.99 on Amazon $218.78 on Amazon $219.00 on Apogee Instruments

  13. Works Cited "Amazon.com: Online Shopping for Electronics, Apparel, Computers, Books, DVDs & More." Amazon.com: Online Shopping for Electronics, Apparel, Computers, Books, DVDs & More. N.p., n.d. Web. 09 Apr. 2013. "DigiKey Electronics - Electronic Components Distributor." DigiKey Electronics - Electronic Components Distributor. N.p., n.d. Web. 09 Apr. 2013. Dunlop, James P. "Introduction to Voltaic Systems." Photovoltaic Systems. Orland Park, IL: American Technical, 2012. N. pag. Print. "SP-212: Amplified 0-2.5 Volt Pyranometer - Apogee Instruments, Inc." Apogee Instruments, Inc.N.p., n.d. Web. 09 Apr. 2013.

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