Three target solar heat collector vacuum tube

Model

47x1500

47x1800

58x1800

58x2000

Diameter

47mm

47mm

58mm

58mm

Length

1500mm

1800mm

1800mm

2000mm

Coating

ALN/SS-ALN/CU

ALN/SS-ALN/CU

ALN/SS-ALN/CU

ALN/SS-ALN/CU

Vacuum

< 5*10 -3

< 5*10 -3

< 5*10 -3

< 5*10 -3

Thickness

1.6mm

1.6mm

1.6mm

1.6mm

Thermal expansion

3.3x10 -6 o C

3.3x10 -6 o C

3.3x10 -6 o C

3.3x10 -6 o C

Material

Borosilicate G 3.3

Borosilicate G 3.3

Borosilicate G 3.3

Borosilicate G 3.3

Stagnation Temperature

> 200 o C

> 200 o C

> 200 o C

> 200 o C

Heat Loss

< 0.8W/ ( m2oC )

< 0.8W/ ( m2oC )

< 0.8W/ ( m2oC )

< 0.8W/ ( m2oC )

Bearing Hail

D25mm

D25mm

D25mm

D25mm

Life Span

15years

15years

15years

15years