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Vacuum Tubes

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  Technical Specifications of ETC Tube:

Sl. No. Description Specifications
1 Evacuated Tube Collector Size Φ47–1200
2 Glass Material High borosilicate 3.3 glass
3 Weight 1.15 KG ± 0.03
4 Structure All–glass double–tube co–axial structure
5 Length of the Tube 1200 mm
6 Outer Tube Dia Φ47 ± 0.7 mm
7 Inner Tube Dia Φ37 ± 0.7 mm
8 Outer Tube Thickness 1.8 mm
9 Inner Tube Thickness 1.8 mm
10 Absorptive Coating Al–N / Al
11 Transmittance of Outer tube ≥0.89 (AM1.5 ISO9806-1 : 1994)
12 Absorption coefficient α than 93% (AM1.5)
13 Emission coefficient Σ ± 6%
14 Heat Loss Coefficient 0.6~0.7W / (m2.oC)
15 Stagnation Temperature 220~260 m2.oC / KW
16 Vacuum 5 x 10 – 3Pa
17 Hail Stone Impact Steel Ball Test: Steel ball with diameter of 35 mm fall on the evacuated tube vertically from 450 mm height, the evacuated tube is not damaged.
18 Vacuum Protection Barium getter
19 Endurability More Than 15 years
20 Solar irradiation for obtaining a preset water temperature H±3.7 MJ/ m2 (Φ47) H=3.1~3.4 MJ/m2
21 Wind resistance 30 m/s
22 Freezing tolerance minus 35oC
23 Absorbance Rate after Coating (AM1.5) / Absorbance Rate after Evacuating (AM1.5) Α ± 94.5% / Α ± 92.5%
24 Emission Rate after Coating (80 ± 5oC) / Emission Rate after Evacuating (80 ± 5oC) Σ ± 6.5% / Σ ± 7.5%
25 Coating No besmirching, crusting or flaking off
26 Pressure 0.6 MPa
27 Coating Lighter Area The coating color shall be even, with lighter area shall be smaller than 50 mm
28 Solar Radiance Exposure ≤3.3 MJ/ m2

Sl. No. Description Specifications
1 Evacuated Tube Collector Size Φ47–1500
2 Glass Material High borosilicate 3.3 glass
3 Weight 1.4 KG ± 0.03
4 Structure All–glass double–tube co–axial structure
5 Length of the Tube 1500 mm
6 Outer Tube Dia Φ47 ± 0.7 mm
7 Inner Tube Dia Φ37 ± 0.7 mm
8 Outer Tube Thickness 1.8 mm
9 Inner Tube Thickness 1.8 mm
10 Absorptive Coating Al–N / Al
11 Transmittance of Outer tube ≥0.89 (AM1.5 ISO9806-1 : 1994)
12 Absorption coefficient α than 93% (AM1.5)
13 Emission coefficient Σ ± 6%
14 Heat Loss Coefficient 0.6~0.7W / (m2.oC)
15 Stagnation Temperature 220~260 m2.oC / KW
16 Vacuum 5 x 10 – 3Pa
17 Hail Stone Impact Steel Ball Test: Steel ball with diameter of 35 mm fall on the evacuated tube vertically from 450 mm height, the evacuated tube is not damaged.
18 Vacuum Protection Barium getter
19 Endurability More Than 15 years
20 Solar irradiation for obtaining a preset water temperature H±3.7 MJ/ m2 (Φ47) H=3.1~3.4 MJ/m2
21 Wind resistance 30 m/s
22 Freezing tolerance minus 35oC
23 Absorbance Rate after Coating (AM1.5) / Absorbance Rate after Evacuating (AM1.5) Α ± 94.5% / Α ± 92.5%
24 Emission Rate after Coating (80 ± 5oC) / Emission Rate after Evacuating (80 ± 5oC) Σ ± 6.5% / Σ ± 7.5%
25 Coating No besmirching, crusting or flaking off
26 Pressure 0.6 MPa
27 Coating Lighter Area The coating color shall be even, with lighter area shall be smaller than 50 mm
28 Solar Radiance Exposure ≤3.3 MJ/ m2

Sl. No. Description Specifications
1 Evacuated Tube Collector Size Φ47–1800
2 Glass Material High borosilicate 3.3 glass
3 Weight 1.68 KG ± 0.03
4 Structure All–glass double–tube co–axial structure
5 Length of the Tube 1800 mm
6 Outer Tube Dia Φ47 ± 0.7 mm
7 Inner Tube Dia Φ37 ± 0.7 mm
8 Outer Tube Thickness 1.8 mm
9 Inner Tube Thickness 1.8 mm
10 Absorptive Coating Al–N / Al
11 Transmittance of Outer tube ≥0.89 (AM1.5 ISO9806-1 : 1994)
12 Absorption coefficient α than 93% (AM1.5)
13 Emission coefficient Σ ± 6%
14 Heat Loss Coefficient 0.6~0.7W / (m2.oC)
15 Stagnation Temperature 220~260 m2.oC / KW
16 Vacuum 5 x 10 – 3Pa
17 Hail Stone Impact Steel Ball Test: Steel ball with diameter of 35 mm fall on the evacuated tube vertically from 450 mm height, the evacuated tube is not damaged.
18 Vacuum Protection Barium getter
19 Endurability More Than 15 years
20 Solar irradiation for obtaining a preset water temperature H±3.7 MJ/ m2 (Φ47) H=3.1~3.4 MJ/m2
21 Wind resistance 30 m/s
22 Freezing tolerance minus 35oC
23 Absorbance Rate after Coating (AM1.5) / Absorbance Rate after Evacuating (AM1.5) Α ± 94.5% / Α ± 92.5%
24 Emission Rate after Coating (80 ± 5oC) / Emission Rate after Evacuating (80 ± 5oC) Σ ± 6.5% / Σ ± 7.5%
25 Coating No besmirching, crusting or flaking off
26 Pressure 0.6 MPa
27 Coating Lighter Area The coating color shall be even, with lighter area shall be smaller than 50 mm
28 Solar Radiance Exposure ≤3.3 MJ/ m2

Sl. No. Description Specifications
1 Evacuated Tube Collector Size Φ47–2000
2 Glass Material High borosilicate 3.3 glass
3 Weight 1.87 KG ± 0.03
4 Structure All–glass double–tube co–axial structure
5 Length of the Tube 2000 mm
6 Outer Tube Dia Φ47 ± 0.7 mm
7 Inner Tube Dia Φ37 ± 0.7 mm
8 Outer Tube Thickness 1.8 mm
9 Inner Tube Thickness 1.8 mm
10 Absorptive Coating Al–N / Al
11 Transmittance of Outer tube ≥0.89 (AM1.5 ISO9806-1 : 1994)
12 Absorption coefficient α than 93% (AM1.5)
13 Emission coefficient Σ ± 6%
14 Heat Loss Coefficient 0.6~0.7W / (m2.oC)
15 Stagnation Temperature 220~260 m2.oC / KW
16 Vacuum 5 x 10 – 3Pa
17 Hail Stone Impact Steel Ball Test: Steel ball with diameter of 35 mm fall on the evacuated tube vertically from 450 mm height, the evacuated tube is not damaged.
18 Vacuum Protection Barium getter
19 Endurability More Than 15 years
20 Solar irradiation for obtaining a preset water temperature H±3.7 MJ/ m2 (Φ47) H=3.1~3.4 MJ/m2
21 Wind resistance 30 m/s
22 Freezing tolerance minus 35oC
23 Absorbance Rate after Coating (AM1.5) / Absorbance Rate after Evacuating (AM1.5) Α ± 94.5% / Α ± 92.5%
24 Emission Rate after Coating (80 ± 5oC) / Emission Rate after Evacuating (80 ± 5oC) Σ ± 6.5% / Σ ± 7.5%
25 Coating No besmirching, crusting or flaking off
26 Pressure 0.6 MPa
27 Coating Lighter Area The coating color shall be even, with lighter area shall be smaller than 50 mm
28 Solar Radiance Exposure ≤3.3 MJ/ m2

Sl. No. Description Specifications
1 Evacuated Tube Collector Size Φ47–2100
2 Glass Material High borosilicate 3.3 glass
3 Weight 1.96 KG ± 0.03
4 Structure All–glass double–tube co–axial structure
5 Length of the Tube 2100 mm
6 Outer Tube Dia Φ47 ± 0.7 mm
7 Inner Tube Dia Φ37 ± 0.7 mm
8 Outer Tube Thickness 1.8 mm
9 Inner Tube Thickness 1.8 mm
10 Absorptive Coating Al–N / Al
11 Transmittance of Outer tube ≥0.89 (AM1.5 ISO9806-1 : 1994)
12 Absorption coefficient α than 93% (AM1.5)
13 Emission coefficient Σ ± 6%
14 Heat Loss Coefficient 0.6~0.7W / (m2.oC)
15 Stagnation Temperature 220~260 m2.oC / KW
16 Vacuum 5 x 10 – 3Pa
17 Hail Stone Impact Steel Ball Test: Steel ball with diameter of 35 mm fall on the evacuated tube vertically from 450 mm height, the evacuated tube is not damaged.
18 Vacuum Protection Barium getter
19 Endurability More Than 15 years
20 Solar irradiation for obtaining a preset water temperature H±3.7 MJ/ m2 (Φ47) H=3.1~3.4 MJ/m2
21 Wind resistance 30 m/s
22 Freezing tolerance minus 35oC
23 Absorbance Rate after Coating (AM1.5) / Absorbance Rate after Evacuating (AM1.5) Α ± 94.5% / Α ± 92.5%
24 Emission Rate after Coating (80 ± 5oC) / Emission Rate after Evacuating (80 ± 5oC) Σ ± 6.5% / Σ ± 7.5%
25 Coating No besmirching, crusting or flaking off
26 Pressure 0.6 MPa
27 Coating Lighter Area The coating color shall be even, with lighter area shall be smaller than 50 mm
28 Solar Radiance Exposure ≤3.3 MJ/ m2

 
   
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