jailcd2018041: Characteristics of Windows Shading for Traditional Dwellings in Zhejiang

Abstract

The shading of south wall windows for Tangwu building is of significant importance to the interior temperature. Taking traditional dwellings in middle Zhejiang province as research objects, the calculation formulae of shading area formed by eave and corridor, East-wing-room building and West-wing-room building, and Hall-room building on south wall windows for Tangwu building are derived and ratiocinated respectively.Taking Faxiangju villa in Sizhai village as example, the shading effects on the days of summer solstice, vernal equinox / autumnal equinox, and winter solstice are analyzed by derivation formulae
respectively. Results demonstrate that when the solar elevation is the biggest on summer solstice, shading effect formed by eave and corridor for south wall windows of Tangwu building is the best on this day. The shading effect formed by East-wing-room building and West-wing-room building for these windows is the best on winter solstice. The shading rate of these windows is gradually decreasing from summer solstice to autumnal equinox, and then to winter solstice, while it is gradually increasing form winter solstice to vernal equinox, and then to summer solstice. It is cyclical change and takes one year as a period.