All Glass Vacuum Tube for Solar Heating
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Price:
Negotiable
- minimum:
- Total supply:
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Delivery term:
The date of payment from buyers deliver within days
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seat:
Zhejiang
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Validity to:
Long-term effective
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Last update:
2017-09-04 09:33
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Browse the number:
220
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Haining Qiruite Photoelectric Co., Ltd.
- Contactaixin:
Mr. Alex Yang(Mr.)
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Email:
telephone:
phone:
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Arrea:
Zhejiang
Address:No. 19, Chuangye Road, Huangwan Town, Haining City, Jiaxing, Zhejiang, China 314415
- Website:
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Detailed Product Description:
Features:
Qirui All-glass Vacuum Tube is made of dual borosilicate glass tubes, the space between the two tubes is evacuated. The AL/N/AL selective coating on the outer wall of the inner tube absorbs sunshine and transforms it into heat which in turn heats the cold water in the inner tube. When the water in the tube is heated, its density will decrease and will go upward into the tank; Meanwhile the cold water in the tank will flow down into the tube due to its greater density. Thus, the circulation and heat-exchanging in the system is completed. The color of the inner tube is black-grey. This vacuum tube has a high heat-efficiency and It is suitable in areas with winter temperature above- 20° C
Features:
Qirui All-glass Vacuum Tube is made of dual borosilicate glass tubes, the space between the two tubes is evacuated. The AL/N/AL selective coating on the outer wall of the inner tube absorbs sunshine and transforms it into heat which in turn heats the cold water in the inner tube. When the water in the tube is heated, its density will decrease and will go upward into the tank; Meanwhile the cold water in the tank will flow down into the tube due to its greater density. Thus, the circulation and heat-exchanging in the system is completed. The color of the inner tube is black-grey. This vacuum tube has a high heat-efficiency and It is suitable in areas with winter temperature above- 20° C
| Item Name | all glass vacuum tube | |
| Model | QR-AT | |
| Structure | All-glass double-tube co-axial structure | |
| Glass material | High borosilicate 3.3 glass | |
| External pipe diameter and thickness | dia.=47± 0.7mm &= 1.6mm dia.=58± 0.7mm &= 1.6mm dia.=70± 0.7mm &= 2.0mm |
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| Internal pipe diameter and thickness | dia.=37± 0.7mm &= 1.6mm dia.=47± 0.7mm &= 1.6mm dia.=58± 0.7mm &= 1.6mm |
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| Pipe length | 1200mm 1500mm 1600mm 1700 1800mm 1900mm 2000mm 2100mm | |
| Absorptive coating property |
Structure | AL/AL-ALN(H)/AL-ALN(L)/ALN |
| Sediment method | Single target magnertron sputtering plating | |
| Specific absorption | a s =0.90~0.93(AM1.5) | |
| Emission ratio | 0.05~0.075( 80 ºC± 5ºC ) | |
| Vacuum tightness | P ≤5.0×10-³Pa | |
| Idle sunning property parameters | Y= 220 ~ 260m² ºC /KW | |
| Solar irradiation for obtaining a preset water temperature | H ≤4.7 MJ/ m²(dia.58) | H=4.1~4.4 MJ/ m² |
| H ≤3.7 MJ/ m²(dia.47) | H=3.1~3.4 MJ/ m² | |
| Average heat loss coefficient | U lt =0.6~0.7W/( m². ºC ) |
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