The effects of the investigated parameters on the ShW
SHGC from the diffuse solar radiation are also studied.
For the system of clear glass window and blind at the slat
angle of 0, the values of the shortwave diffuse transmittance
from the sky and from the ground are the same.
Fig. 21 shows the comparison between the value of ShW
SHGC for diffuse radiation of the plain clear glass window
and the clear glass window with blind in different values of
slat reflectance, different slat distances and different slat
curvatures. The effects of the investigated parameters on
the ShW SHGC for diffuse solar radiation are similar to
the effects of the same investigated parameters on the
ShW SHGC for direct solar radiation. The glass window
with blind of a higher slat reflectance will give a higher
value of diffuse ShW SHGC. The glass window with blind
of a higher slat distance will give a higher value of diffuse
ShW SHGC. The glass window with blind of a greater
value of slat radius of curvature will give a greater value
of diffuse ShW SHGC.