In Architecture we speak of sunning or sunlight when it comes to the need to allow the sun to enter interior environments or outdoor spaces where hygrothermal comfort is sought. It is a concept used by bioclimatic Architecture and bioclimatism.

In order to achieve adequate sunlight, it is necessary to know "solar geometry" to predict the number of hours that a place will be sunny through the solar radiation that passes through windows and other non-opaque surfaces. It is likely that after a sunlight study it will be necessary to control the entry of solar radiation through adequate solar protection and thus be able to regulate the effect of the sun and its ability to heat the interior of habitable premises. A glass surface or an opaque surface needs to be sunned or protected from the sun. In each In this case, the way in which the sun's heat will be transmitted to the interior of the premises will be significantly different.

In order to analyze window sunlight, there are various techniques, the oldest and still in force is through the help of "solar charts" that indicate the path of the sun in each month of the year and at each hour at a given latitude.

Another way widely used by bioclimatic architects is through the use of a heliodon that simulates the position of the sun in the celestial vault. It supplies the sun with a high-intensity lamp that will illuminate a model of the building to be analyzed, illuminating the areas exposed to the lamp (sun) and shading the areas opposite it. The heliodon is an expensive and bulky instrument that is present in almost all architecture faculties and schools in the world that have an environmental laboratory.

Nowadays there are programs that allow this complex analysis to be carried out in a simple way, such as 3D Studio Max, SketchUp [1] Archived on December 13, 2009 at the Wayback Machine., among others.

Contenido

En el caso de superficies vidriadas ventanas la radiación solar llegará a la superficie del exterior del vidrio y en condiciones generales medias el 86% continuará por el interior del local hasta encontrar una superficie opaca. Dependiendo de su color parte de absorberá y parte se reflejará. La parte absorbida calentará la masa del elemento y luego de calentada irradiará calor en el espectro infrarrojo, ya no visible al ojo humano.

The Solar Factor

The sun factor is small when the sun protection is opaque and light in color. If the sun protection is not opaque and partially allows the passage of solar radiation, the value of the solar factor g increases.

where:.