Abstract
Recently, energy saving of small public buildings is gaining more and more attention. The envelope system takes the most important and fundamental part of reducing building energy consumption. In this study, a community center in Shanghai is used as an example to analyze the envelope of small public buildings. The structural design of walls, roofs, thermal bridges and shading measures is carried out. Comsol multi-physics simulation software is applied to perform two-dimensional simulation analysis on the heat transfer of the outer envelope structure of the community center to verify the energy saving effect of the outer envelope structure. This study indicates that small public buildings with additional rock wool thermal insulation panels could optimize energy performance in both winter and summer. The difference between the roof inner surface temperature of the building before and after retrofitting in winter is 26.96 °C, a difference of 1.95 °C; while in summer it is 2.26 less than before retrofitting when the temperature is cooled to °C 28 °C. The result of this study provides a new perspective for the research of energy saving in small public buildings.
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