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Problem Set

Sun Angle Calculator
Solar Time Calculator
Aperature Irradiation Calculator
System Performance Model
LEC Calculator

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Sun Angle Calculator

PROGRAM ANGLECALC - This JavaScript program uses the equations developed in this text to calculate the sun altitude angle (Eqn. 3.17), sun zenith angle (Eqn. 3.8) and sun azimuth angle (Eqn. 3.19). Also, with input of the collector (or tracking axis) tilt angle and tilt azimuth, we calculate the angle of incidence between the sun rays and the collector aperture (Eqns. 4.3, 4.19, and 4.24.). We use Eqn.(3.22) to calculate the sunset and sunrise time, and then Eqn.(3.23) to calculate the hours of sunshine for the day.