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THERMAL PERFORMANCE OF HIGH-EFFICIENCY WINDOW TECHNOLOGIES

DOI: 10.1615/AnnualRevHeatTransfer.2019030886
pages 59-97

Elise Strobach
Device Research Laboratory, Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA

Bikram Bhatia
Device Research Laboratory, Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA

Lin Zhao
Device Research Laboratory, Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA

Evelyn N. Wang
Device Research Laboratory, Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA


Palavras-chave: window, glazing, fenestration, building energy efficiency

Resumo

Windows are the primary source of energy loss in building envelopes. In this chapter, we compare the thermal performance of existing and state-of-the-art window technologies by using industry-established figures of merit. The performance needs of windows can vary drastically depending on climate and occupant needs; therefore, here we focus on the strategies to control the optical and thermal properties to optimally satisfy building needs. We discuss designs and technologies that address radiative, convective, and/or conductive heat transfer using a variety of approaches, such as glass coatings, active transmittance control, noble gas fills, and thermal breaks.

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