2.0
Solar collector specifications
4
© Baxi Heating UK Ltd 2011
C
A
D
B
Table of dimensions (mm)
20 tube
10 tube
A
1418
1209
B
1996
1996
C
1475
737.5
D
97
97
Fig. 2
2.1
Technical Data
20 tube
10 tube
Gross area:
2.83m
2
1.45m
2
Net area:
2.00m
2
1.076m
2
Weight:
54.8 kg
27.4 kg
Fluid Volume:
3.8 litres
1.9 litres
Pressure:
8 bar
8 bar
Absorption:
95%
95%
Emission:
5%
5%
Stagnation temp:
286°C
286°C
Glass:
65mmØ Low-iron - transmission 0.92
Light transmittance: >90.8% ± 2%
All dimensions shown in mm
0
2
4
6
8
10
5
20
15
25
30
35
40
Pr
essur
e Dr
op (mbar)
Flow Rate (l/min)
0
10 tubes
20 tubes
Coefficients of efficiency
(20 & 10 tubes)
(determined in the sun simulator SUSI 1)
=
o - a1.(tm - ta)/G - a2.(tm - ta)
2
/G
Based on:
aperture area
absorber area
o =
0.773
0.830
a1 =
1.43 W/m
2
K
1.53 W/m
2
K
a2 =
0.0059 W/m
2
K
0.0063 W/m
2
K
Fig. 3
