Outstanding design, professional processing, top quality and high energy yield, as well as their excellent price/performance ratio make the SOLFEX CPC OEM vacuum tube collectors stand out. High-quality, corrosion-resistant and tested materials ensure smooth operation of these solar thermal panels over a long life. The well-known indestructibility of the borosilicate glass tubes was confirmed by positive test results in the hailstone test according to DIN EN 12975-2 and the thermal shock test.
The low pressure loss allows several modules to be connected in series. The aperture area measurements of 1.0, 2.0 and 3.0 m2 allow accurate adjustment to water and/or space heating requirements. SOLFEX also paid careful attention to details which are important for mounting the system: the solar system is delivered with a tentered sun protection sheet to allow commissioning the system even during maximum solar irradiation. Hand straps which can be attached to the collector frame ensure safe and easy transport onto and across the roof and can be used as transport straps for quick mounting.
To increase the efficiency of evacuated tube collectors, a highly reflective, weather-proof CPC reflector (Compound Parabolic Concentrator) is fitted behind the evacuated tubes. The special, improved geometry of the reflector ensures that direct and diffuse sunlight falls onto the absorber even when the angle of incidence is not ideal. This considerably improves the energy yield.
The evacuated tube is a product with improved geometry and performance. The evacuated tubes consist of two concentric glass tubes which are sealed in a semi-circular shape on one side and are joined to one another on the other side. The space between the tubes is evacuated and then hermetically sealed (evacuated insulation).
To use solar energy, the internal glass tube is coated with an environmentally friendly, highly selective layer on the outside, thus turning it into an absorber. The coating is protected in the evacuated space. The aluminium nitrite sputter coating used is characterised by extremely low emissions and excellent absorption.
Flat roof & wall installation
Scope of delivery
Pre-assembeled unit comprising of
Evacuated tubes based on the thermos flask principle
Manifold with direct low heat conduction unit and dry tube connection
CPC reflector Collectors are packed in individual boxes.
A sun protection sheet over the evacuated tubes.
Pressure LossHeat transfer medium: Tyfocor LS, medium temperature 40°C
|CPC 21 OEM|
|Number of evacuated tubes||21|
|η0 in relation to aperture, EN 12975 (%)||74.5|
|a1 with wind, in relation to aperture (W/(m²k))||2.007|
|a2 with wind, in relation to aperture (W/(m²k²))||0.005|
|Grid dimensions (length x height x depth, m)||1.45 x 1.64 x 0.1|
|Gross surface area (m²)||2.32|
|Aperture area (m²)||1.33|
|Collector contents (l)||2.5|
|Max. working overpressure (bar)||10|
|Max. stagnation temperature (°C)||220|
|Connection diameter, compression fitting (mm)||15|
|Sensor sleeve (mm)||6|
|Collector material||Al / Copper / glass / silicone / PBT / EPDM / TE|
|Glass tube material||borosilicate glass 3.3|
|Selective absorber coating material||aluminium nitrite|
|Glass tube (Ø ext./Ø int./wall thickn./tube lgth.)||mm 47/37/1.6/1500|
|Colour (aluminium frame profiles, powder-coated)||aluminium grey|
|Colour (plastic parts)||black|
|Thermal shock test / ITW test number||06COL517|
|Hailstone test according to DIN EN 12975-2 / TÜV test number||435/142448|
|EC type examination||Z-IS-DDK-MUC-07-08-100029919-003|