Sunlight of 1 KW/m2 falls directly on a window which is a vertical sheet of plain glass. Sun is in south-west and 300 above horizon. Window points towards the south. Estimate the amount of solar energy that,
- enters the building through the window,
- is reflected by the window.
Given black body emissivity power table:
|
lT
|
F( lT)
|
|
1900
2000
2100
15000
16000
17000
|
0.05210
0.06672
0.08305
0.96893
0.97377
0.97765
|