4
Technical specifications
DESCRIPTION
Total area
2,30
m
2
Exposed area
2,16
m
2
Effective absorption area
2,15
m
2
Connections (M) - (M)
1"
Empty weight
41,0
kg
Liquid content
1,6
l
Recommended flow rate for each line per m
2
of collector
30
l/(h x m
2
)
Minimum flow rate for each line per m
2
of collector
12
l/(h x m
2
)
Maximum flow rate for each line per m
2
of collector
60
l/(h x m
2
)
Glass thickness
3,2
mm
Thickness of rock wool insulation
40
mm
Absorption (
α
)
95
%
Emissions (
ε
)
4
%
Maximum permitted pressure
10
bar
Stagnation temperature
200
°C
Maximum number of collectors in a line
6
n°
Efficiency parameters
Description
Absorber
surface area
Open surface
area
Gross surface
area
U/M
Optical efficiency (
ηο
) (*)
0,785
0,778
0,726
-
Thermal dispersion factor (a1) (*)
4,61
4,57
4,27
W/(m
2
K)
Thermal dispersion temperature dependence factor
(a2) (*)
0,0021
0,0021
0,0019
W/(m
2
K
2
)
Description
U/M
IAM (50°) (*)
0,93
-
Collector efficiency (
ηcol
) (**)
59,2
%
(*) Tested according to EN 12975, referred to a 33.3%
water-glycol mix, flow rate of 160 l/h, and irradiation G
= 800W/m
2
.
Tm = (Coll._inlet _temp.+Coll._outlet_temp.)/2
T*m =
(Tm-T_ambient)/G
(**) Calculated with a temperature difference of 40K be-
tween the solar collector and the surrounding air, and
with total solar radiation of 1000 W/m
2
referred to the
exposed area.
Efficiency curve (referred to absorber surface area)
0,75
0,80
0,65
0,70
0,55
0,60
0,45
0,50
0,40
0,35
0
0,01 0,02 0,03 0,04 0,05 0,06 0,07 0,08
Tm[m
2
K/W]
*
WIND AND SNOW LOADS ON COLLECTORS
Installation
height above
ground
Wind speed
Mass in kg to secure collector
against lifting by wind
Load on roof from wind, snow, and
collector weight
At angle of
45
°
At angle of
20
°
At angle of
45
°
At angle of
20
°
0 - 8 m
100 km/h
80 kg
40 kg
320 kg
345 kg
8 - 20 m
130 km/h
180 kg
90 kg
470 kg
430 kg
20 - 100 m
150 km/h
280 kg
150 kg
624 kg
525 kg
Maximum permitted load from wind and snow (including combined loads) on surface of collector: 1500 Pa (175
km/h).
TECHNICAL SPECIFICATIONS
Содержание CFO-25S
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