SolarWorld Suntub, Руководство по проектированию и установке

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Table 3: Shading intervals, front edge to front edge [mm] depending on the roof pitch and angle of insolation
Angle of insolation 12° 13° 14° 15° 16° 17° 18°
Roof pitch Shading intervals from front edge to front edge [mm]
6° 2331 229 215 2109 20 1991 190
5° 221 2331 229 215 2109 20 1991
4° 2523 221 2331 229 215 2109 20
3° 238 2523 221 2331 229 215 2109
2° 29 238 2523 221 2331 229 215
1° 2920 29 238 2523 221 2331 229
0° 3095 2920 29 238 2523 221 2331
- 1° 3302 3095 2920 2 238 2523 221
- 2° 359 3302 3095 2920 2 238 2523
- 3° 3851 359 3302 3095 2920 2 238
- 4° 228 3851 359 3302 3095 2920 2
- 5° 12 228 3851 359 3302 3095 2920
- 6° 5355 12 228 3851 359 3302 3095
B3
Shading table
Sample calculation of required ballast
The ballast required for a building with the following data has been calculated as follows:
• Building height h = 8m
• Basic building size 10x20m
• Class III
• Individual Suntubs to be joined (optional)
• Roof pitch 2°
• Angle of insolation 1°
1. PV system distance from edge:
a1=a2=0,2x8,0=1,0m
2. Ballast
Building height h=8m, joined rows → Table 2:
• Centre ballast 83,9 kg and
• Edge ballast 10,9 kg
3. Shading interval
Front edge to front edge: 2.523 mm
Required ballast Centre 83,9 kg/Suntub
Edge: 104,9 kg/Suntub
20
a1
10
a2
8
Fig. B5.1