## Solar azimuth angle z

The solar azimuth angle, z, is the angle of the sun's rays measured in the horizontal plane from due south (true south) for the Northern Hemisphere or due north for the Southern Hemisphere; westward is designated as positive. The mathematical expression for the solar azimuth angle is sin(z) = cos(8)sin(h) (2.13)

This equation is correct, provided that (ASHRAE, 1975) cos(h) > tan(6)/tan(L). If not, it means that the sun is behind the E-W line, as shown in Figure 2.4, and the azimuth angle for the morning hours is —tc + |z| and for the afternoon hours is tc — z.

At solar noon, by definition, the sun is exactly on the meridian, which contains the north-south line, and consequently, the solar azimuth is 0°. Therefore the noon altitude a„ is an = 90° - L + 6 (2.14)

## Solar Stirling Engine Basics Explained

The solar Stirling engine is progressively becoming a viable alternative to solar panels for its higher efficiency. Stirling engines might be the best way to harvest the power provided by the sun. This is an easy-to-understand explanation of how Stirling engines work, the different types, and why they are more efficient than steam engines.

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### Responses

• rasheeda
What is azimuth angle in solar?
7 years ago