solar energy vacuum tube (BNVT)

Models:    Ф58?80
Weight:    2.29?.18kg
Structure:   All glass coaxial double-layer tubes
Outer tube diameter:   Ф58?.7mm
Inner tube diameter:   Ф47?.7mm
Outer Tube thickness:  1.8?.15mm
Inner tube thickness:  1.6?.15mm
Tubes length:      1812?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: ≤0.6 w/ (m2*℃)
Bearing hailstone ability: hailstone diameterФ25mm
Pressure-endure ability:   1MPa

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