32 – Part
5:
Specifi cations – VELUX solar collector
Part 5: Specifi cations
VELUX solar collector
Measurements (inches)
Width
Height
Depth
Code
U12
S06
M08
Code
U12
S06
M08
All
Gross
S
54.1
46.2
32.0
T
72.0
47.5
56.2
3.9
Frame
W
52.8
44.9
30.7
H
70.7
46.2
54.8
Glass
I
51.5
43.6
29.4
J
69.4
44.9
53.5
Aperture
E
49.5
41.6
27.4
F
67.4
42.9
51.6
Absorber
K
49.8
41.9
27.8
L
67.7
43.2
51.9
Packaging
-
56.1
48.2
34.0
-
73.2
48.7
57.4
4.1
Technical specifi cations
U12
S06
M08
Weight (lbs.)
Collector weight
130
73
57
Weight w/fl uid
141
79
64
Collector area (sq. ft.)
Gross area
27.1
15.2
12.5
Aperture area
23.1
12.4
9.8
Absorber area
23.4
12.6
10.0
Fluid volume (gal.)
0.58
0.34
0.24
Max operating pressure (psi)
87
87
87
Test pressure (psi)
145
145
145
Stagnation temperature (°F)
374
374
365
Thermal performance rating - warm climate (1000s btu/day)
Clear day
29
15
12
Mildly cloudy day
20
11
8
Cloudy day
11
6
5
Thermal performance rating - cool climate (1000s btu/day)
Clear day
19
10
8
Mildly cloudy day
11
6
4
Cloudy day
4
2
1
Effi
ciency
eta0 (start effi
ciency)
0.6960
0.6610
0.6390
a1 (Btu/hr*ft2*°F)
0.4747
0.4666
0.4603
a2 (Btu/hr*ft2*°F2)
0.0020
0.0019
0.0018