Installation, operation and maintenance instructions - DualSun XXXM
–
60
–
3BBP
V1.2
–
March 2020
Page
7
sur
41
2.3
Technical specifications
2.3.1
Physical characteristics
Please consult the datasheet in our
2.3.2
Photovoltaic characteristics
Please consult the datasheet in our
2.3.3
Thermal characteristics
THERMAL CHARACTERISTICS
Sensor surface
1.635 m²
Liquid volume
5 L
Maximum operating pressure
1,5 bar
Hydraulic input/output
15mm or 26mm fitting
Non-insulated
Insulated
Stagnation temperature
70 °c
75,6 °c
Optical efficiency a
0
58,9% *
58,2% *
Coefficient a
1
16 W/K/m² *
10,8 W/K/m² *
Coefficient a
2
0 W/(M², K²) *
* The coefficients a
0
, a
1
and a
2
are derived from the ISO 9806:2017 certification tests for the non-glazed solar
collectors carried out by KIWA for a wind speed u = 1 m/s: a
0
= n
0
- c
6
*u
’
; a
1
= c
1
+ c
3
*u
’; u’ = u
- 3.
