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مکانیک::
زاویه عرضی
In a simplified definition, the solar transverse angle varies throughout the day depending on the solar time, whereas the solar longitudinal angle is a function of the latitude, declination and collector slope.
Figure 6.3: Incidence angles and sun position (a) transverse angle (b) longitudinal angle
Transverse angle (degree)
Figure 6.7: Solar total power absorbed vs. transverse angle
As the power absorbed decreases, the efficiency rises from 62% to a peak of 77% at a 60-degree transverse angle and then decreases to 74% at 75-degrees.
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