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Effect of surface thermal resistance on the simulation accuracy of the condensation risk assessment for a high-performance window

Title
Effect of surface thermal resistance on the simulation accuracy of the condensation risk assessment for a high-performance window
Authors
Koo S.Y.Park S.Song J.-H.Song S.-Y.
Ewha Authors
송승영
SCOPUS Author ID
송승영scopus
Issue Date
2018
Journal Title
Energies
ISSN
1996-1073JCR Link
Citation
Energies vol. 11, no. 2
Keywords
3D thermal simulationCondensation riskHigh-performance windowSurface thermal resistance
Publisher
MDPI AG
Indexed
SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
The accuracy of condensation risk assessment depends on the accuracy of the measured or calculated temperatures. The existing 2D simulation method provides sufficiently accurate results for evaluating average performance values, such as U-values. However, the accuracy of predicting the temperatures in the local areas such as the edge-of-glazing and the frame has been questioned. This study analyzes the effect of the surface thermal resistance on the accuracy of the condensation risk assessment for high-performance windows. Experiments and three-dimensional simulations were performed for a triple-glazed window. The differences in results between the basic experimental test and the simulations with several different applied boundary conditions were analyzed. The results show that, in the simulations, a small change in the surface thermal resistance has no significant effect on the accuracy of the condensation risk assessment of the center-of-glazing or the frame. However, for the edge-of-glazing, the accuracy of predicting the condensation risk was significantly improved by using the increased local surface thermal resistance with the simulation. By employing the reduced radiation and convection at the edges or junctions between two surfaces, the error between the measured and calculated temperature factors can be reduced to less than 3%. © 2018 by the authors.
DOI
10.3390/en11020382
Appears in Collections:
공과대학 > 건축도시시스템공학과 > Journal papers
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