Daylight Design Graphs for Baghdad City Sky

Abstract

Baghdad city constitutes one of the areas have clear sky with complex and ununiform

distribution of light in the sky dome. This was one of the explanations why there is few

studies concern with daylighting design in clear skies, from there, this research oriented to

devise a new method that can assist in achieving the appropriate levels of lighting for

interior spaces. The aim of this research is tempted to find a method that can help designers

in achieving the appropriate levels of daylight in architectural spaces with different forms

and sizes.

The annual distribution rate of daylight was calculated for the horizontal surfaces of

different orientations and unobstructed horizontal surface Furthermore account the Intensity

of sky light and sun light on vertical surfaces of building facades opposite to the windows.

Been reached a number of Graphs as protractor used with architectural drawings

(horizontal plans and vertical sections), and by adopting of such Graphs, designers can

measure the levels of daylight in any points within the space.

Applied this method on a number of design characteristics of shape and direct the

window and measure its influence in enlightened points within the space as their distance

changes away from window. The research found a number of conclusions linked between the

predictability of the distribution of daylighting levels within the space and pattern of

distribution of windows within its