THE DEVELOPMENT OF SIMPLE CALCULATION MODEL FOR ENERGY PERFORMANCE OF DOUBLE SKIN FAÇADES

Abstract

Estimating thermal effect of so called double-skin façades on energy performance f buildings with two envelopes, a proprietary mathematical model of heat ransfer through double-skin façades has been developed. A very specific pproach of the mathematical model presented here is based on prediction of the ouble-skin façades interspace temperature and assumption that façade could be reated as a single one declaring the interspace temperature and reduced ntensity of solar radiation as the "outdoor" conditions. n this paper results of the heating and cooling loads as well as the interspace emperature prediction compared for three months (January, April and July) and or the west oriented façade with ordinary and absorption glass are presented. açade is placed under climatic conditions of Belgrade (45° North Latitude). lso, results for weather conditions of sunny and cloudy day are shown. Results ncludes influence of air velocity in interspace of façades for April and July. ollowing a type of the double-skin façade construction assumption it was mplied that the space between the two envelopes is closed during the winter ode for air circulation, in order to have temperature higher inside than outside nd opposite in the summer mode, air inlet and outlet are opened in order to revent much higher temperatures than the outside ones, and higher cooling load f an air-conditioned building, as a consequence. Taking only thermal effects into ccount, presented prediction has proven that double-skin façades decrease both uilding heat losses and heat gains throughout the year, and give significant ontribution to the building energy consumption savings.

Keywords

Dates

  • Submission Date2012-02-01
  • Revision Date2012-03-20
  • Acceptance Date2012-03-29

DOI Reference

10.2298/TSCI120201076A

References

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