Abstract
Buildings use as much as 40% of the world’s total primary energy. This huge energy consumption is mainly tied to poor designs and entrenched practices for buildings’ envelopes. One major road toward more energy efficient buildings is to employ design principles that are in harmony with the radiation in our natural surroundings. Glass coatings with spectral selectivity can lead to windows and glass facades with good thermal insulation and capability to transmit mainly visible light or, alternatively, across the full solar spectrum. Chromogenic glazings, especially if based on electrochromism, can regulate the inflow of visible light and solar energy between widely separated limits and achieve further energy efficiency. The new fenestration technologies are able to improve indoor comfort.
About the author
Claes G. Granqvist is a Professor of Solid State Physics at the Ångström Laboratory, Uppsala University, Sweden, since 1993. During 1989–1993, he was a Professor of Experimental Physics at Gothenburg University, Sweden. Much of Granqvist’s research is concerned with materials for energy efficiency and solar energy utilization in the built environment. Electrochromics-based and thermochromics-based ‘smart windows’ with variable transmittance of visible light and solar energy are two examples of this work. Other recent research includes transparent electrical conductors and nanomaterials for gas sensing and for photocatalytic purification of gases and fluids. Granqvist is a member of the Royal Swedish Academy of Science, the Royal Swedish Academy of Engineering Sciences, and Regia Societas Scientarium Upsalienses. Furthermore, he is a Fellow of the International Society of Optical Engineering (USA), Dr h.c. at Universidad Nacional de Ingeniería in Lima, Peru, and honorary member of the Materials Research Society of India. He has received several prizes and awards, including the Society of Vacuum Coaters’ Mentor Award of 2011. Granqvist is one of the founders of ChromoGenics AB, a company with some 20 employees, for producing electrochromic foils.
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