Evaluation of Energy Efficiency Performance of Heated Windows

Hari Swarup Jammulamadaka, Bhaskaran Gopalakrishnan, Subodh Chaudhari, Senthil Sundaramoorthy, Akash Rajesh Mehta, Roseline Mostafa

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Fenestration systems are widely used across the world. There is expansive research on window configura-tions, frames, and glazing technology, but not enough research has been published on reducing window heat loss through heat application to a pane. The presented study attempted to evaluate the performance of heated windows by developing an experimental setup to test a window at various temperatures by varying the power input to the window. Heated double pane window was installed in an insulated box. A temperature gradient was developed across the window by cooling one side of the window using gel-based ice packs. The other face of the window was heated by enabling power at different wattages through the window. The temperature of the inside and outside panes, current and voltage input, and temperature of the room and box were recorded. The data was used to calculate the apparent effective resistance of the window when not being heated vs. when being heated. The study concluded that, when window temperature was maintained close to the room temperature, the heated double pane window is effective in reducing heat loss by as much as 50% as compared to a non-heated double pane window. When temperature of the window was much higher than the room temperature, the heat loss through the window increased beyond that of a non-heated window. The issues encountered during the current stages of experiments are noted, and recommendations are provided for future studies.

Original languageEnglish
Pages (from-to)1-16
Number of pages16
JournalEnergy Engineering: Journal of the Association of Energy Engineering
Volume119
Issue number1
DOIs
StatePublished - 2022

Funding

Funding Statement: This research work was funded in part by the Industrial Assessment Center Project, supported by grants from the US Department of Energy and by the West Virginia Development Office.

Keywords

  • Building energy models
  • Floor heating
  • Heated windows
  • Perimeter heating
  • Window efficiency

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