The next parameter to be investigated is the distance between the slats (slat distance).
From Figs. 13–15, it can be seen that the variation of the ShW SHGCof the glass window system on the investigated parameter has the same behavior for three slat positions chosen (0, 45 and 45).
But among the three slat positions, the effect is clearly seen in the case of the slat angle of 0.
Therefore in the following study, the result of the study on the investigated parameter will be shown in the case of the slat angle of 0.
The effect of the slat distance (range from 10 mm to 25 mm) on the ShW SHGC of the clear glass window with blind of 0.6 slat reflectance and set at the slat angle of 0 is shown in Fig. 19.
From Fig. 19, decreasing the distance between the two slats causes the value of the ShW SHGC to increase.
The glass window with the blind of 10 mm slat distance gives the lowest value of ShW SHGC.
The glass window with the blind of 25 mm slat distance gives the highest value of ShW SHGC.
The effect of the slat distance on ShW SHGC is clearly seen for the solar profile angle of 10–40.
In those sun positions when the slat distance is larger the solar radiation is more easily transmitted through the blind into the room.