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research-article

Metamaterial Window Glass

[+] Author and Article Information
Alex Heltzel

PC Krause and Associates, Inc., 3000 Kent Avenue, West Lafayette, IN 47906
heltzel@pcka.com

Tyler Mann

The University of Texas at Austin, 204 E. Dean Keeton St., Austin, TX 78712
tmann216@gmail.com

John R. Howell

Fellow, ASME, The University of Texas at Austin, 204 E. Dean Keeton St., Austin, TX 78712
jhowell@mail.utexas.edu

1Corresponding author.

ASME doi:10.1115/1.4039921 History: Received April 29, 2015; Revised March 08, 2018

Abstract

A computational study of a metamaterial (MTM)-on-glass composite is presented for the purpose of increasing the energy efficiency of buildings in seasonal or cold climates. A full-spectrum analysis yields the ability to predict optical and thermal transmission properties from ultraviolet through far-infrared frequencies. An opportunity to increase efficiency beyond that of commercial low-emissivity glass is identified through a metamaterial implementation of Ag and dielectric thin-film structures. 3-D finite-difference time-domain simulations predict selective non-linear absorption of near-infrared energy, providing the means to capture a substantial portion of solar energy during cold periods, while retaining high visible transmission and high reflectivity in far-infrared frequencies. The effect of various configuration parameters is quantified, with prediction of the net sustainability advantage. MTM window glass technology can be realized as a modification to commercial low-emissivity windows through the application of nanomanufactured films, creating the opportunity for both new and after-market sustainable construction.

Copyright (c) 2018 by ASME
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