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Buildings 2016, 6(2), 22; doi:10.3390/buildings6020022

Variation of Thermochromic Glazing Systems Transition Temperature, Hysteresis Gradient and Width Effect on Energy Efficiency

1
School of Engineering and Materials Science, Queen Mary University London, Mile End Road, London E1 4NS, UK
2
Materials Research Institute, Queen Mary University London, Mile End Road, London E1 4NS, UK
3
School of Property, Construction and Project Management, RMIT University, PO Box 2476, Melbourne, Vicotria 3001, Australia
*
Author to whom correspondence should be addressed.
Academic Editor: Somayeh Asadi
Received: 12 May 2016 / Revised: 20 May 2016 / Accepted: 25 May 2016 / Published: 1 June 2016
(This article belongs to the Special Issue Smart Building Materials)
View Full-Text   |   Download PDF [5986 KB, uploaded 1 June 2016]   |  

Abstract

Due to increasing pressure to reduce the energy demand in buildings, thermochromic thin film based glazing has become a recognized potential solution due to the intrinsic ability to modulate the solar heat gain of a window as a function of the materials temperature. These “intelligent” glazings have been investigated for several years, and it has been found that, through variation of synthetic route, the thermochromic properties (transition temperature, hysteresis gradient and width) can be altered; however, less attention has been applied to how such alterations affect the overall energy savings attributed to the materials. In this study the building simulation software EnergyPlus TM has been used to model a series of idealized thermochromic spectra in a series of different environments to evaluate their energy saving potential against both clear glass systems and industry standards. The idealized spectra are used to see what effect each of the materials thermochromic properties and therefore elucidate which are the most important with respect to the energy saving properties. It was found that the best thermochromic materials were those with a narrow sharp hysteresis and a low transition temperature and result in an increase in energy saving between 30%–45% across the different environments compared to clear glass systems. View Full-Text
Keywords: energy simulation; thermochromics; “intelligent” glazing; energy demand reduction; energy plus; energy efficiency energy simulation; thermochromics; “intelligent” glazing; energy demand reduction; energy plus; energy efficiency
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Warwick, M.E.A.; Ridley, I.; Binions, R. Variation of Thermochromic Glazing Systems Transition Temperature, Hysteresis Gradient and Width Effect on Energy Efficiency. Buildings 2016, 6, 22.

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