objectionable shadows caused by relief or low solar altitude
The difference between the solar altitude angle in summer and winter was more than twice (83.
T] became less than zero at 9 o'clock in July, due to the solar altitude which was caused the sun position parallel with the shading device (Fig.
s]) the first climatic parameter became evident; the solar altitude angle in July was more beneath to vertical line and in January was nearest to the earth (83.
For this day, the temperature is warm, but the midday solar altitude is relatively low, allowing for significant solar gains through equator-facing windows.
Ideally, this day should be chosen to be within about two months of winter solstice since it is intended to identify overheating in the shoulder season when the midday solar altitude is relatively low.
Differences in the attenuation coefficients of snow in the same month can be attributed to differences in cloud cover, solar altitude and liquid water content.
The diurnal variation in solar radiation was controlled mainly by cloudiness and solar altitude.
Figure 2 and Table 2 shows the variation of light shelf tilt angle, k, as a function of the solar altitude angle).
Light Shelf Tilt Angle as a function of solar altitude Altitude Angle Light Shelf Tilt Angle a > 45 [degrees] [zeta] = 0 [degrees] 45 [degrees] >= a > 30 [degrees] [zeta] = 30 [degrees] 30 [degrees] >= a > 15 [degrees] [zeta] = 60 [degrees] 15 [degrees] > a [zeta] = 90 [degrees]
h = solar altitude angle: angle between horizontal and line to sun
The input variables for the neural network include solar altitude angle, dry-bulb temperature, dew-point temperature, wind speed, relative humidity, and cloud cover.