Learning Solar Engineering fundamentals and light measurement

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Learning Solar Engineering fundamentals and light
measurement

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Wei Fang, Ph.D., Professor Dept. of
Bio-Industrial Mechatronics Engineering National
Taiwan University
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Various sensitivity curves
Receiving light
Plant
Human
Spectral irradiation vs. sensitivity curve of
Plants
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Receiving light
Absorption peaks of chlorophyll a and b are at
red 600700 nm and blue 400500 nm region
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Insects
Receiving light
Sensitivity curves
chicken
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Light source
Sensitivity curve of plants
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Light sensor
Photometer Illumination, in Lux
Quantum Sensor Photosynthesis, in µmol/m2/s
Pyranometer Solar energy, in W/m2
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Sensitivity curves of sensors
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Limitation of Quantum sensor
Quantum Sensor
can not be used to measure red or blue LEDs
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Other solar related sensors
Portable device
Suitable for 3 different units LI-190
Quantum LI-200 Pyranometer LI-210 Photometric
meter
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About Sun track
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Solar declination
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Altitude vs. Azimuth angle
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Cylindrical Diagram
900am on the 1st of April
Southern Lat. 32 deg.
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Totaldirect diffuse
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Sun track of a day
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Top view
Northern Lat. 30 deg.
0 Latitute
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Northern hemisphere
Latitude 51o
Latitude 23.5o
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Full Diagram

• Learn about
• Date line
• Hour line
• Azimuth angle
• Altitude angle

Azimuth angle
Altitude angle
Date line
Hour line
Southern Lat. 32 deg.
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Date Lines
Southern Lat. 32 deg.
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Hour Lines
Southern Lat. 32 deg.
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Azimuth Angle
Southern Lat. 32 deg.
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Altitude Angles
Southern Lat. 32 deg.
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3 D View
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Northern Latitude 51o
n299
6/21
3/21, 9/21
12/21
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Northern Latitude 51o
n235
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Equation of Time
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The Analemma
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Keatsley, G., 1996
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Sun rise/set hour
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About Radiation
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E.T. solar radiation on a horizontal plane
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Spectral irradiance of Sun
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PAR Fraction of ET irradiance
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Hourly ratio
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More about Solar Engineering Fundamentals

• Following contents, created by the author, are
  available from DSpace at UVM.
• Tutorial for MATLAB based solar engineering
  fundamentals
• MATLAB based software for the teaching of Solar
  Engineering Fundamentals

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• The End