The highly reflecting vega energy specular surfaces are a key component of
concentrating solar systems. They concentrate the solar radiation
precisely to achieve extreme energy densites. By using vega energy mirrors with
their outstanding reflecting properties the performance can be
increased significantly in concentrating parabolic systems
(CSP) for the generation of solar thermal electricity, or
process heat for industrial applications, air conditioning or sea
water desalination.
VEGA PRIME
vegaprime is a composite mirror made using vega WR highly reflective weather resistant
aluminium, combined with a plastic core and a corrosion resistant stabilizing aluminum sheet on the back
side.
The product can be used flat or can be curved to meet special design requirements.
Customers can be provided with the complete mirror ready for mounting on a space frame support structure.
Low mirror weight simplifies the construction process and mounting requirements, significantly reducing
costs.
The exact shape and dimensional characteristics can be designed to meet customer requirements.
vegaprime offers an excellent blend of flexibility, light weight and mechanical resistance and
can be used flat or formed to a curve and the materials and manufacturing process employed impart excellent shape
retention whatever your special design.
vegaprime can be offered in many configurations in terms of size, thickness and rigidity.
The max size is 1250 mm x 6000 mm.
Laminated vegaprime mirrors provide customers with a wide range of production
possibilities.
vegaprime can be supplied in several sizes, weights and thicknesses; this makes this product
suitable for different High, Medium and Low Concentration Solar Power applications like:
- Low concentration photovoltaic systems
- Fresnel systems
- Parabolic trough collectors
- Heliostats for central receiver tower plants.
The vega high reflectance layers are deposited on a substrate of mirror finished brightened and anodized high purity
aluminium, which provides a high quality chemically stable surface to give maximum durability to the product and
good bonding characteristics to the panel.
The PVD applied reflection enhancing system comprises a layer of 99.99% pure aluminium surmounted by two transparent
optical layers of alternate low and high refractive index which increase the total reflectance of the surface to
over 95%.
The PVD layers are finally protected by a highly transparent, hard, weather resistant top coat which maintains a
high reflectance performance (>93% TR) against the effects of abrasion and weathering of the mirror surface.
VEGA PRIME
| Aluminium thickness |
mm |
0,30 |
0,30 |
0,50 |
0,50 |
0,50 |
| Panel Weight |
Kg/m² |
2,9 |
3,8 |
5,5 |
6,4 |
7,3 |
| Standard Width |
mm |
1250 |
| |
| Thickness |
mm |
± 0.2 |
| Length |
mm |
= 4000 mm: -0.0 /+4
4001-6000 mm: 0.0 / +6 |
| |
| Rigidity |
[EI] kNcm²/m |
291 |
727 |
2036 |
3358 |
5011 |
| Modulus of Elasticity |
[E] N/mm² |
70000 |
| Linear Thermal Expansion |
mm/m/°K |
2.4 x 10² |
| |
| Operational temperature range |
° C |
-40° ; +80° |
| |
| Total Solar reflectance [ ASTM G173] |
% |
89,9 |
Total reflectance "Visible range"
[ASTM E1651] |
% |
> 93 |
| Diffuse reflectance [ ASTM G173] |
% |
1,6 |
| |
Cross hatch adhesion test
[EN ISO 2409] |
|
No loss of coating adhesion |
Fallling ball impact test
[BS EN ISO 6272-1] |
|
No coating failure |
| |
| UV resistance [EN ISO 4892-3] |
|
< 0,5 % reflectance change in 1000 h |
Neutral salt spray
[ASTM B 117 - ISO 9227 NSS] |
|
< 1 % reflectance change in 3000 h |
| Humidity resistance [ISO 4623] |
|
< 0,5 % reflectance change in 500 h |
|