1)material:borosilicate 3.3 glass
2)Strong heat collection;
3)low emission
4)Long life
Min. order:1000 pieces
Port: Shanghai/Ningbo
Minimum Order Quantity: 1000 Piece/Pieces
Supply Ability: 300000 Piece/Pieces per Year
Payment Terms: L/C,T/T
Contact SupplierPackaging Detail: Carton box
Delivery Detail: Within 15 days after receipt of deposite
The three cavity vacuum heat collecting property and specification is as follows
Structure | All-glass concentric dual tube geomer | |
Glass material | Borosilicate glass | |
Outer tube diameter and thickness | Φ=47±0.7mm & =1.5mm Φ=58±0.7mm & =2mm Φ=70±0.7mm & =2mm | |
Inter tube diameter and thickness | Φ=37±0.7mm & =1.5mm Φ=47±0.7mm & =1.6mm Φ=58±0.7mm & =1.6mm | |
Tube Length | 1200(±5mm)1500(±5mm) 1700-1800(±5mm) 2000(±5mm) | |
Absorbing | Configulation | 1200(±5mm) 1500(±5mm) 1700-1800(±5mm) 2000( ±5mm) |
Method to deposition | Graded A1-N/A1 solar selectuve absorbing coating | |
absorptance | as 0.88-0.93 | |
Emittance | Σn:-.08-0.04 | |
Vacuum | p ≤ 2 × 10-3 | |
Stagnation parameter | 250M2C/KW | |
Solar radiance exposure for obtaining a preset water temperature | 2.8MJ/M2 | |
Average heat loss coefficient | 0.8W(M2C) | |
Lifetime | 15years |