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Evaluation of Alternatives for Improving the Thermal Resistance of Window Glazing Edges

Title
Evaluation of Alternatives for Improving the Thermal Resistance of Window Glazing Edges
Authors
Park, SihyunSong, Seung-Yeong
Ewha Authors
송승영
SCOPUS Author ID
송승영scopus
Issue Date
2019
Journal Title
ENERGIES
ISSN
1996-1073JCR Link
Citation
ENERGIES vol. 12, no. 2
Keywords
windowcondensationglazing edgetemperature difference ratio (TDR)U-factor
Publisher
MDPI
Indexed
SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
To reduce condensation and ensure occupant comfort, the Korean Design Standard for Preventing Condensation in Apartment Buildings was enacted in 2014. However, glazing edges remain vulnerable to condensation. Because this design standard is recent, few window products satisfy the condensation resistance requirement for glazing edges, especially in the coldest region, and there have been limited investigations on improvement measures. This study evaluates and verifies various treatments for improving the glazing edge thermal resistance of double-glazed four-track horizontal sliding windows to reduce condensation risk and satisfy the design standard. Three-dimensional heat transfer simulations are performed for each alternative to obtain the surface temperature and temperature difference ratio (TDR) for the bottom edge of the glazing. The U-factors of the alternatives satisfying the required TDR for the coldest region are simulated, and the effects of increased local thermal resistance in the glazing edge on the U-factor of the window are analyzed. Mock-up tests are performed on the most economical and best-performing alternatives satisfying the coldest region TDR, and the TDRs and U-factors from the simulations and mock-up tests are compared to verify the performance of the most economical alternative. Insulating spacers, frame extensions, and low-emissivity coatings are effective in various cases.
DOI
10.3390/en12020244
Appears in Collections:
엘텍공과대학 > 건축공학전공 > Journal papers
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