The energy consumption analysis for the windows with external shading influenced on the green building

Abstract

Window is a major factor affecting air-conditioning load. It brings heat conduction and convection caused by temperature difference, as well as the heat transferring by sun radiation, which has greater impact on air-conditioning load. The concept of building external shading is elaborated in this paper. The energy consumption of windows with exterior shading has an influence on the consumption of buildings. By employing the Ecotect ecological building design software, the external shading of office buildings in Fuzhou and Shenyang, is analyzed. The results show that active external shading is better for the Shenyang area building; for the Fuzhou area, the 0.4-m-level sun shields are most effective in energy-saving. External shading by geographical factors provided reasonable suggestions for the preparation and revision of the Green Building Evaluation Standard. © Springer-Verlag Berlin Heidelberg 2014.