good quality ,reliable performance , reasonable price
Price Terms:FOB,CIF,EXW
Payment Terms: T/T,Western Union,MoneyGram,L/C
Minimum Order: Negotiatable
Delivery Port: Customized
Contact SupplierPackaging Detail: Export carton
Delivery Detail: within 15 days after receive the prepaid payment.
evacuated tube, for solar collector, solar water heater
Structure | All-glass double-tube co-axial structure | |
Glass material | High borosilicate 3.3 glass | |
External pipe diameter and thickness | Φ=58±0.7mm &=1.6mm | |
Internal pipe diameter and thickness | Φ=47±0.7mm &=1.6mm | |
Pipe length | 1800mm | |
Absorbing coating property | Structure | Cu/SS-ALN(H)/SS-ALN(L)/ALN |
3 target magnertron sputtering plation | ||
Sediment method | as=0.93~0.96(AM1.5) | |
εh=0.04~0.06(80±5) | ||
Specific absorption | ||
Emission ratio | ||
Vacuum tightness | P≤5.0X10-3Pa | |
Idle sunning property parameters | Y=260~300m2./KW | |
Solar irradiation for obtaining a preset water temperature | H≤4.7MJ/m2(Φ58) | H=3.7~4.2MJ/m2 |
H=2.9~3.2MJ/m2 | ||
H≤3.7MJ/m2(Φ47) | ||
Average heat loss coefficient | ULT=0.4~0.6W/(m2. |