Question

What is solar declination and its importance in solar pv lighting and solar water heating

Answer 1

In general, the Sun declination angle, δ, is defined to be that angle made between a ray of the Sun, when extended to the center of the earth, O, and the equatorial plane. We take δ to be positively oriented whenever theSun's rays reach O by passing through the Northern hemisphere.

Answer 2

Answer:

This angle is called the solar declination. It is defined as the angular distance from the zenith of the observer at the equator and the sun at solar noon. It is positive when it is north and negative when it is south.