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Products

Reflective surfaces for solar applications

Reflective surfaces are a key element in solar concentrating systems

They have to reflect the solar radiation as effectively and accurately as possible. 
The ALMECO GROUP has developed a range of vega energy specular surfaces, with reflectance even higher than 98%, manufactured through a PVD process in the Bernburg plant in Germany.They significantly increase the performance of:
• parabolic trough collectors (CSP) that convert solar energy into thermal energy, used in various industrial processes or in the production of electric power systems
• CPV (Concentrated PhotoVoltaic) to produce electric energy
• CPC (Compound Parabolic Concentrator), to produce sanitary hot water
• micro CSP (Concentrated Solar Power) concentrators with systems of linear Fresnel collectors to produce process heat in the industrial field.

To guarantee the highest efficiency in each specific application, the ALMECO GROUP has developed a wide range of surfaces with different characteristics within the range of vega energy.

the highest solar reflection

The surfaces of vega energy SP range offer the highest levels of total and specular reflection and are used in solar collectors placed in protected environments. The optimum behavior to solar radiation results in a higher concentration and a lower diffusion of light. 
vega energy SP surfaces are made of pre-anodised aluminium with a multilayer coating, obtained by PVD process, which uses a thin film of 99.99% pure aluminium or silver.

production process

icone-lavorazioni-100
Anodising
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PVD

the guarantee of long durability over time

The resistant SWR686 surface ia manly used for the creation of CPC (Compaund Parabolic Concentrators) for vacuum tube collectors and micro-CSP systems, where the optimization of the investimenti s as essential as the reflectance.
The specular aluminum surface, electrobrightened and anodized, is protected with an additional coating that is highly resistant to most environmental condition. With 87% of Total Reflctance, SWR686 is the ideal solution to ensure a long life for outdoor situation.

Almeco is one of the few companies in the world that is able to combine development and production of highly specialised surfaces with the production and engineering of solar reflectors.
the vega energyHT and vega energyTS surfaces have been developed to maximize the optical efficiency and its durability of secondary reflectors installed on solar concentration systems - the innovative multilayer that characterizes these surfaces offers the best combination of optical performance and temperature resistance to guarantee a long efficiency – the products available both in flat formats and in finished reflectors represent Almeco's continuous commitment in developing surfaces for applications of  renewable energies.

vega energyHT is designed to maintain constant high levels of reflection even at continuous operating temperatures of up to 250°C. It is the ideal surface to be used in the secondary reflectors of the Fresnel systems.  Its special coating greatly reduces the degradation phenomena of the reflecting surface, ensuring high performance over the long run.

Vega energyTS has a unique composition that allows to keep its performances of reflection intact even at operating temperatures above 300°C, minimising the losses. Not surprisingly, the acronym TS indicates its outstanding thermal stability. 


production process

icone-lavorazioni-100
Anodising
icone-lavorazioni-102
PVD