solar energy vacuum tube (BNVT)

Models:   Ф47?50
Weight:   1.35?.12kg
Structure: All glass coaxial double-layer tubes
Outer tube diameter:  Ф47?.7mm
Inner tube diameter:  Ф37?.7mm
Outer Tube thickness:  1.6?.15mm
Inner tube thickness:  1.6?.15mm
Tubes length:  1542?mm
Material of coating:  AlN/AIN-SS/Cu
Absorptance:   0.94~0.96
Emittance:    0.04~0.06
Vacuum:     P≤5?0-3pa
Transmittance of Outer Tube:  0.91
Stagnation temperature (height): 270~300℃
Heat-loss coefficient:  ≤0.6w/ m2*℃)
Bearing hailstone ability: hailstone diameterФ25mm
Pressure-endure ability:  1MPa

Post Date:	4/20/2008
Expiry Date:	7/19/2008