Hollow-Structured Bilayer System for Windowpane Insulation
Publication: Journal of Energy Engineering
Volume 147, Issue 4
Abstract
A hollow-structured bilayer coating system was developed to reduce heat loss through windowpanes. It was formed by two separate polymer films with stable air gaps in between. The outer surface was enhanced by a low-emissivity layer. Following ASTM C1199, ASTM C518, NFRC-100, and NFRC-102, the heat transfer measurement indicated that a 3-mm-thick bilayer coating could significantly reduce the -factor from 5.8 to . The -factor could be further lowered if the coating thickness was increased. The overall visual transmittance, haze, and structural integrity were satisfactory.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
This study was supported by the Advanced Research Projects Agency–Energy (ARPA-E) under Grant No. DE-AR0000737.
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Published In
Journal of Energy Engineering
Volume 147 • Issue 4 • August 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Oct 1, 2020
Accepted: Mar 9, 2021
Published online: May 25, 2021
Published in print: Aug 1, 2021
Discussion open until: Oct 25, 2021
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