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Hollow-Structured Bilayer System for Windowpane Insulation

  • Rui Kou
  • , Ying Zhong
  • , Qingyang Wang
  • , Jeongmin Kim
  • , Jian Zeng
  • , Renkun Chen
  • , Yu Qiao*
  • *Corresponding author for this work
  • University of California at San Diego
  • University of South Florida

Research output: Contribution to journalArticlepeer-review

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 U-factor from 5.8 to 2.9 W/(m2·K). The U-factor could be further lowered if the coating thickness was increased. The overall visual transmittance, haze, and structural integrity were satisfactory.

Original languageEnglish
JournalJournal of Energy Engineering
Volume147
Issue number4
DOIs
StatePublished - 1 Aug 2021
Externally publishedYes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

  1. SDG 7 - Affordable and Clean Energy
    SDG 7 Affordable and Clean Energy

Keywords

  • Coatings
  • Energy efficiency
  • Heat transfer
  • Windows

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