15.07.2015   EuroSun2008-4

The sun of different directions

Previous diagrams show the intensity of desirable/undesirable direct radiation in each moment on a surface perpendicular to the rays of the sun so they are not usable for different side of buildings.

Подпись:
To achieve the kind and unkind faces of the sun for each direction, applying the effect of incidence angle in each moment is needed.

As the second row of above diagrams shows, the south direction of building has two advantages: it reduces the unkind face of the sun in summer and it receives more from its kind face in winter.

Fig. 5. Collecting yearly +/- values of all directions and slopes. (each face receives + and — values)

 

image168

1st International Congress on Heating, Cooling, and Buildings " ‘ 7th to 10th October, Lisbon — Portugal *

image169

Fig. 6. Generating the scores for each direction and slope from average and percentage of +/- values