solar vacuum tube

0.8MPa

Maximum Strength

<0.8W/ ( m2oC )

Heat Loss

>200oC

Stagnation Temperature

P<5x10-3 Pa

Vacuum

<8% (80oC)

Emittance

>92% (AM1.5)

Absorptance

Graded Al-N/Al

Absorptive Coating

Borosilicate Glass 3.3

Material

3.3x10-6 oC

Thermal expansion

1.6mm

Glass thickness

47mm

Inner tube diameter

58mm

Outer tube diameter

1500mm /1800mm

Length (nominal)

                                                        solar  vacuum tube