ING DIRECT BANK
FEASIBILITY STUDY OF AMORPHOUS SILICON SKYLIGHTS IN MADRID
Reduction in HVAC energy demands
Internal Rate of Return
ING, the largest online bank in the world, pledged their commitment to Onyx Solar®’s technology with the integration of a photovoltaic glass skylight in the central garden of their headquarters in Las Rozas, Madrid.
The skylight, with a surface area of over 200 m2 , is comprised of 78 amorphous silicon glass modules with a semi-transparency degree of 20% (L vision) and dimensions of 2,560 x 1,176 mm.
This skylight has a power capacity of 7 kWp and is capable of generating nearly 13,000 kWh of clean, free energy yearly, thus preventing the release of almost 9 tons of CO2 into the atmosphere while supplying over 700 lights throughout the building.
In addition to generating power, the glass modules employed filter up to 99% of ultraviolet radiation and 95% of infrared light. These modules also have an optimal Solar Factor which enables the entry of daylight while preventing the greenhouse effect, enhancing considerably the comfort of its occupants. The g value is between 20% and 40%, depending on the degree of semi-transparency.
- Total area - 223 M2
- Electricity generated per year - 12.550 kWh
- Total lighting points operating 4 hours a day - 715 lighting points
- Avoided CO2 emissions per year - 8.408 CO2
- Barrels of oil saved per year - 8 barrels
"With the photovoltaic glass modules in the skylight, we managed to exploit all the energetic potential of this area, while providing our garden with a pleasant atmosphere”. “In this way, this area represents a further example of our commitment to the environment; we achieve considerable energy savings, we use resources responsibly, we promote sustainable architecture and we gain a different, innovative workplace”.
Juan Carlos Castillo, Director de Servicios Generales y Seguridad de ING Bank.