New developments in glazing for a better use of solar energy in buildings
Dr. Andreas Gombert
Concentrix Solar GmbH
Tommi Vainio
The need for low-emissivity glasses arises obviously from the need to save energy. The Window Energy Rating (WER) takes into account both the heat leakage through the window as well as the heat gain from the solar energy. Generally both hard coated low-e glasses (based on transparent conductive oxides) and soft coated superlow-e glasses (based on silver layers) fall into the same WER category. The WER calculation reveals that hard coated glasses with emissivity 0.13 or lower offers the same overall annual energy consumption than soft coated glasses. Such glasses, named as nERGYTM glass, can be produced with the novel Aerosol Based Coating (ABC) process.
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Dr. Tommi Vainio
Chief Technical Officer Beneq Oy |