Net ZEB Case Studies - Modeling, Design, and Optimization of Net-Zero Energy Buildings - page 447

Fig. 7.69 Typical design conditions for cooling dominated climate
Initial simulation indicates that daylighting with the VC louver is not able
to satisfy the 250 lux requirement for the interior zone for most of the time,
except for the 3 h around noon on a sunny day. This is because the solar
altitude angle is high and hence the incidence angle is large. An exterior
horizontal reflector with the same area as the daylight window is inserted
just below the daylighting window. Natural daylight illuminance on the first
design day is able to reach 200 lux between 9 A.M. and 3 P.M., as shown in
Figure7.70 . Thespacecoolingloadincreases slightlyasshownin Table7.17 .
As seen from Figure 7.70 , direct solar radiation can penetrate through the
north windows in the early morning and late afternoon.