Vacuum tube solar collector spare empty vacuum tube 58x1800 mm Three Target coating (vacuum tube. vacuum tube)

Vacuum tube without copper insert

Model RT-MC58*1800
Glass structure: Pure glass double tube coaxial structure
Glass material: Borosilicate 3.3 glass
Glass tube outer diameter 58 mm ± 0.7mm
Glass tube inner diameter 47 mm ± 0.7mm
Glass tube wall thickness 1.6 mm ± 0.15 mm
Glass tube length 1800 mm
Vacuum tube surface 0.128m2
Selective absorber coating material: Cu/SS-AIN
Coating process: "Three targeted" magnetron sputtering coating
Absorption capacity: α: ≥0.93 (AM1.5)
Emissivity: ε≤6.5% (80°C±5°C)
Vacuum degree: P ≤5.0×10-3 Pa
Stagnation parameter: >200~240 m²°C/kw< /span>
Average heat loss: ULT≤0.65W/(m²,°C)
Hail resistance: Φ25 mm
Pressure resistance: 0.6 Mpa

Empty vacuum tube

Empty vacuum tubes play an important role in the efficiency of the collector as they prevent heat loss and minimize heat conduction. Empty vacuum tubes create a vacuum-like environment to retain solar energy, as heat transfer in a vacuum is significantly less than in air or other media.

Vacuum tube solar collectors are often used in heating systems, water heaters, bathtubs, swimming pools or other heat-intensive applications. The spare empty vacuum tubes allow the solar energy to be efficiently stored and continuously supplied even in sunny weather or during less active periods of the day.

Use this product when ordering small quantities (between 1-10). These vacuum tubes - due to their fragility - can only be ordered by personal collection. For personal collection, please provide packaging material!  "color: #000000;">Recommended order 10-15 pieces or a multiple thereof, in this case it can be received and delivered in factory packaging.< /p>

Only without the glass tube, copper insert, dust cover and aluminum spacer.