|
Main features
Bent absorber
plate
High efficiency under low ambient temperature due to ultra high vacuum
Fast start-up due to small thermal capacity of working fluid
Low heat losses due to thermal diode effect
No corrosion or scaling problems due to patented thermo-compression
sealing technology
Easy installation and maintenance
Antifreeze
High system operation pressure resistance and thermal shock resistance
Higher energy through heat transmission by working fluid compared to
thermal conduction
Higher energy gain of 10-15% per day due to semi-cylindric absorber plate
Reliable and durable
Specification
Material:
borosillicate glass 3.3 (T-0.91)
Coating: SS-C/CU
selective compound absorb coating
Absorbance: 0.88-0.94
Remittance: 0.08-0.04
Vacuum Degree: =<2x10-3Pa
Max.pressure: 6 Bars
Hail resistance: =<25mm
Technical layouts
Glass vacuum
tubes
Model VT70 200cm
Main features
High solar-thermal conversion and low heat loss
Stable advanced coating up to 380¡æ
Long time warranty to 15 years
High level vacuum ensure operation under cold weather
Specificatiom
|
Structure |
All-glass concentric dual tube geometer |
|
Glass material |
Borosilicate glass |
|
Outer lube diameter and thickness |
Ø=70¡À0.7mm &= 2.0 mm |
|
Inner lube diameter and thickness |
Ø47¡À0.7mm &=1.6mm |
|
Tube Length |
2000 mm (¡À5mm) |
|
Absorbing coating properties |
Construction |
Graded Al-N/Al solar selective absorbing coating |
|
Method to deposition |
DC reactive sputtering |
|
Absorbance |
>91% |
|
Emittance |
<8%(80¡ãC) |
|
Vacuum |
P<5X10 -3 Pa |
|
Stagnation parameter |
= 230M 2 ¡ãC/KW |
|
Solar radiance exposure for obtaining a preset water
temperature |
= 2.8MJ/M 2 |
|
Average heat loss coefficient |
= 0.8W/(M 2 ¡ãC) |
|
Lifetime |
15 years |
Model VT58
170cm
Main features: idem model model MSM70
Specification idem model MSM70 except
tube length = 1700mm
Model VT47
120 to 150cm
Main features: idem model model MSM70
Specification idem model MSM70 except
tube length = 1200mm to 1500mm
Reminder: 2.54cm = 25.4 mm = 1 inch |
