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Architectural Institute of Korea (대한건축학회)
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Energy demand analysis according to window size and performance for Korean multi-family buildings

  • Huh, Jung-Ho (Department of Architectural Engineering, University of Seoul) ;
  • Mun, Sun-Hye (Department of Architectural Engineering, University of Seoul)
  • Received : 2013.08.30
  • Accepted : 2013.12.05
  • Published : 2013.12.30
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Abstract

Special attention is required for the design of windows due to their high thermal vulnerability. This paper examines the problems that might arise in the application of the u-value, by reflecting the changes in the u-value of the window, depending on the window-to-wall ratio obtained in an energy demand analysis. Research indicates that the u-value of a window increases with an increase in the difference between the u-values of the frames and the glass. Relative to the changes in the u-value of the windows, the energy demand varied from 1.3% to 9.3%. Windows with a g-value of 0.3 or 0.5 displayed a higher energy demand than windows with a g-value of 0.7. Therefore, when the difference between the performance of the glass and the frame is significant, especially when the g-value is small, a modified heat transmission coefficient should be applied to the window size during the evaluation of the building energy demand.

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References

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