Stereographic Sun-path chart - this method is easiest to draw. Sky's hemispherical vault onto 2-D plane. Orthographic Sun-path diagram - ortographic Sun-path chart is an exact projection of Geometrically projected but are equally spaced as concentric circles. Depending on projection used following Sun path chartsĮquidistant Sun-path chart - method was developed in 1948 by Irving F. Sun-path chart or Sun-path diagram is simple graphical method to present H = ± 15°⋅number of hours from/to solar noon.įIGURE 2: Declination, calculated by equation above, for details see literature Hour angle is calculated by simple equation The most important geometrical parameters, which describe Earth-Sun Very useful tool in the early photovoltaic system design phase for shadowingĭetermining. The solar path is described with the Sun path diagram. Understanding the motion of the Sun is essential for proper solar systems designĪnd the choice of proper location for solar collectors or photovoltaic modules. The modules have to be fixed with proper tilt angle allowing the system efficient operation. Therefore, the properties and values of solar insolation should be studied. Modules are exposed to sunlight without shadowing at least from 9 am to 3 pm Satisfactory, if the location wasn’t properly chosen. Even the most carefully planned solar system doesn’t work The choice of a proper location is the first and the very essential step in solar
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