Description
The evacuated tubes consists of two concentric glass tubes which are sealed in a semi-circular shape on one side and are joined to one another on the other side. The space between the tubes is evacuated and hermetically sealed (evacuated insulation). To use solar energy, the internal glass tube is coated with an environmentally friendly, highly selective layer on the outside, thus turning it into an absorber. The selective coating is protected in the evacuated space. The aluminum nitride sputter coating used is characterized by an extremely low emission and a high absorption rate.
Features
1. Cheap and reliable solution, Simple structures, Easy installation.
2. High efficiency of heating,water heated by sun light directly.
3. Withstands water pressure no more than 0.1MPa.
4. Operated without any power supplying.
5. Electric heater can be used as back-up in rainy days.
6. Hot water can be used directly, or can be used as a pre-heated.
7. Water flow in the vacuum tubes and is operated when confined.
8. Tank is equiped with electric water heater setting,automatic temperature controller(optional ).
9. the insulating layer uses polyurethane bulk bubble,keep hot water 72 hours.
Parameter
Tube Structure | All-glass double deck co-axial structure | |
Glass material | Borosilicate 3.3 glass | |
Outer tube diameter and glass thickness | Φ47+/-0.7mm; glass thickness 1.6+/-0.15mm | |
Φ58+/-0.7mm; glass thickness 1.6+/-0.15mm | ||
Inner tube diameter and glass thickness | Φ37+/-0.7mm; glass thickness 1.6+/-0.15mm | |
Φ47+/-0.7mm; glass thickness 1.6+/-0.15mm | ||
Tube Length | 1800mm; 2100mm | |
Absorber coating | Coating Material | Cu/SS-AIN(H)/SS-AIN(L) |
Sediment method | Three targets magnetron sputtering plating | |
Absorptivity | 0.93~0.96 | |
Emittance | ≤6.0%（80℃+/-5℃） | |
Vacuum degree e | P ≤5.0X10-3(Pa) | |
Transmittance of glass tube | T ≥0.89（AM1.5 ISO9806-1：1994 | |
Stagnation parameter | Y: 240~250 m2℃/KW | |
Average heat loss | ULT≤0.6 W/(m2*℃） | |
Hail resistance | Φ25mm | |
Pressure endure | 0.6 MPA | |
Principle
Production Process
Description
The evacuated tubes consists of two concentric glass tubes which are sealed in a semi-circular shape on one side and are joined to one another on the other side. The space between the tubes is evacuated and hermetically sealed (evacuated insulation). To use solar energy, the internal glass tube is coated with an environmentally friendly, highly selective layer on the outside, thus turning it into an absorber. The selective coating is protected in the evacuated space. The aluminum nitride sputter coating used is characterized by an extremely low emission and a high absorption rate.
Features
1. Cheap and reliable solution, Simple structures, Easy installation.
2. High efficiency of heating,water heated by sun light directly.
3. Withstands water pressure no more than 0.1MPa.
4. Operated without any power supplying.
5. Electric heater can be used as back-up in rainy days.
6. Hot water can be used directly, or can be used as a pre-heated.
7. Water flow in the vacuum tubes and is operated when confined.
8. Tank is equiped with electric water heater setting,automatic temperature controller(optional ).
9. the insulating layer uses polyurethane bulk bubble,keep hot water 72 hours.
Parameter
Tube Structure | All-glass double deck co-axial structure | |
Glass material | Borosilicate 3.3 glass | |
Outer tube diameter and glass thickness | Φ47+/-0.7mm; glass thickness 1.6+/-0.15mm | |
Φ58+/-0.7mm; glass thickness 1.6+/-0.15mm | ||
Inner tube diameter and glass thickness | Φ37+/-0.7mm; glass thickness 1.6+/-0.15mm | |
Φ47+/-0.7mm; glass thickness 1.6+/-0.15mm | ||
Tube Length | 1800mm; 2100mm | |
Absorber coating | Coating Material | Cu/SS-AIN(H)/SS-AIN(L) |
Sediment method | Three targets magnetron sputtering plating | |
Absorptivity | 0.93~0.96 | |
Emittance | ≤6.0%（80℃+/-5℃） | |
Vacuum degree e | P ≤5.0X10-3(Pa) | |
Transmittance of glass tube | T ≥0.89（AM1.5 ISO9806-1：1994 | |
Stagnation parameter | Y: 240~250 m2℃/KW | |
Average heat loss | ULT≤0.6 W/(m2*℃） | |
Hail resistance | Φ25mm | |
Pressure endure | 0.6 MPA | |
Principle
Production Process
