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is a company specialized in aluminium products, starting from its early days as a supplier of reflector components for local Italian companies to its present position as a supplier to all the world’s major lighting system producers. This specialisation has led the Group to become one of the world's biggest producers of components for the lighting technology, solar energy industries and decorative market.

Vegaflex

Technology
Tech Data

Vegaflex is a complete system for parabolic trough concentrators that combines the ultra-reflective Vega-energy coating from the ALMECO Group with aluminum-reinforced composite plates from ALMECO's partner Xeliox.
The result is a complete mirror element that manufacturers of CSP plants can quickly and easily install on support systems without any further ado.

The system keeps its shape extremely well because all of the components have the same thermal expansion coefficient. In addition, Vegaflex is extremely lightweight and robust, which lowers the installation and maintenance costs of CSP plants considerably.

Vega 95

With a solar reflection rate exceeding 93 percent, ALMECO's mirror layer ensures that parabolic trough plants can make optimal use of solar energy. As a result, the performance of CSP plants increases significantly.
At the same time, an innovative ceramic layer reliably protects the reflectors from rain, sand, and salt to keep performance high; ALMECO guarantees that the degree of reflection will not drop by more than three percent in 10 years.

Vegaflex gives manufacturers of CSP plants a lot of leeway in designing their systems.
The curvature and dimensions of the concentrators can be adjusted to fit the requirements of the specific installation exactly, with troughs of up to 6.5 meters in width.
Vegaflex is also excellent for small solar air-conditioning systems (used, for instance, in hotels and commercial buildings) and for process heat (in the food industry and for solar-powered desalination systems, to take two examples); its mirror elements can be manufactured even with a tiny curvature radius of ten centimeters.

Vegaflex is sold both by the ALMECO Group and by Xeliox.

For further information on Vegaflex, see our brochure

Technical reflectance characteristics
Property	Typical value	Standard
Solar reflectance	≥ 89%	ASTM 891 - 87
Total reflectance (visible range)	≥ 93%	DIN 5036-3 ASTM E 1651
Specular reflectance	≥ 87%	ISO 7668
Spectral reflectance	See graph below
Focus on target	≥ 99,8%	Profilometer ENEA

Physical properties
Property	Typical value	Standard
Specific weight	6 - 8 kg/m² *	-
Transverse stiffness	1.8 -3.5 kNm²/m*	UNI EN 63-DIN 53293
Longitudinal Stiffness	3.5 – 21.5 kNm²/m*	UNI EN 63-DIN 53293
Impact resistance	No breakage or coating failure	ISO 6271-1
Thermal expansion	23,5 x 10^-6 / °C	-
Surface hardness	> 7H pencil hardness	ISO 15184
* depending on thickness

Durability
Property	Typical value	Standard
Coating adhesion	No failure on cross hatch test	ISO 2409
UV resistance	< 3% reflectance change in 3000 h	ISO 4892-3
Neutral salt spray resistance	< 3% reflectance change in 3000 h	ISO 9227 NSS ASTM B 117

Vegaflex 939
Nominal thickness mm	Effective thickness mm	Specific weight kg/m²	Rigidity E x I Nm²/m tool parallel to corrugation	Rigidity E x I Nm²/m tool perpendicular to corrugation
10	11	6,78	1768	3311
15	15,2	6,94	3100	6743
18	17,9	6,98	3074	9497
20	20	7,3	3086	12103
25	25	8,16	3200	18024

Vegaflex

Technical reflectance characteristics

Physical properties

Durability

Vegaflex 939