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 Series

 U1521

 Number of evacuated tubes

 21

 η in relation to aperture, EN 12975

 % 

 74.5

 c1 with wind, in relation to aperture

 W/(m2k)

 2.007

 c2 with wind, in relation to aperture

 W/(m2k2)

 0.005

 Yield forecast

(location Wurzburg, Germany, reference area 3 m2)

 kWh/m2a

 780

 Yield forecast

(location Wurzburg, Germany, reference area 5 m2)

  kWh/m2a

 619

 Grid dimensions (length x height x depth)

 m

 1.45 x 1.64 x 0.10

 Gross surface area

 m2

 2.32

 Aperture area

 m2

 1.33

 Collector contents

 l

 2.5

 Weight

 kg

 51

 Max. working overpressure

 bar

 10

 Max. stagnation temperature.1)

 °C

 220

 Connection diameter, compression fitting

 mm

 15

 Sensor sleeve

 mm

6

 Collector material

 Al / Cu / glass / silicone / PBT / EPDM / TPE

 Glass tube material

 borosilicate glass 3.3

 Selective absorber coating material

 aluminium nitride

 Glass tube (Ø ext./Ø int./wall thickn./tube lgth.)

 mm

47/37/1.6/1500

 Colour (aluminium frame profile, anodised)

 aluminium grey

 Colour (plastic parts)

 black

 Thermal shock test / ITW test number

 06COL517

 Hailstone test according to DIN EN 12975-2 / TUV test number

 435/142448

 EC type examination

 Z-IS-DDK-MUC-07-08-100029919-003

 DIN CERTCO registration number

 011-7S1990 R