GREENING SHADING DESIGN OF RESIDENTIAL BUILDINGS IN THE HOT SUMMER AND COLD WINTER ZONE

With ever-increased concerns on energy efficiency of residential buildings, greening shading has been high valued in shading field in hot summer and cold winter zone. It is commonly agreed that using plants or vegetation may reduce indoor direct solar radiation and energy consumption of HVAC system, so as to achieve better energy efficiency effects. By collecting and investigating several residential buildings and relevant data, three appropriate greening shading methods are summarized and analyzed in detail in the paper: 1) Environment greening shading, which means to plan vegetation location in building environment and peripheral site by calculation, simulation and measurement in order to reduce direct solar radiation absorbed by the ground; 2) Vertical greening shading, which means shading with plants such as liana growing on building or structure envelope surface. This shading device can not only prevent solar radiation, but also absorb heat by transpiration, increase e environmental humidity suitably, and reduce building envelopes' temperature change range, all of which may improve indoor thermal comfort. It is the primary greening shading method in hot summer and cold winter zone. 3) Roofing greening shading, which is adopted as a new shading model I-or its ability of.-heating absorption, insulation of cultivation matrix. It is useful to moderate hot-island effect and meliorate building thermal condition. Based on these analyses, this paper wants to conclude comprehensive greening shading measures adapted to climate traits of hot summer and cold winter zone, which would be hoped to be useful knowledge added into the whole energy efficiency system.