Xiamen Housing External Window Form And Shading Effects On Indoor Thermal Environment

Affordable housing is the national and local to solve part of the housing problems of low-income families in towns and puts forward the construction of the target. Xiamen affordable housing construction. On the one hand require "function complete, small family". On the other hand, in accordance with the relevant provisions must meet the requirements of green building standards. Building external window is the main source of the summer heat gain in Xiamen. Indoor thermal environment and air conditioning energy consumption of buildings have a significant impact. Based on the Xiamen affordable housing as the research object. The paper mainly discusses the external Windows forms and shading effects on indoor thermal environment. Then for affordable housing to improve indoor thermal environment and energy conservation design standard to provide the reference and guidance. The thesis mainly the following several aspects of the work has been done.By adopting the method of field survey, survey the Xiamen both affordable housing construction requirements, construction situation, structure selection, external form, outside the window shading and the present situation of use. Survey statistics show that both the affordable housing construction area of 4.4412 million m2. Mainly distributed in Xiang ’an area, the lake area and Jimei district. Point structure housing accounts for 76%. The external window form mainly flat and convex window. Shade structure mainly composed of horizontal visor.Xiamen jimei waterfront area of affordable housing as an example. The site measured point in the summer of affordable housing different floors and toward the window outside form and shading effects on indoor thermal environment. Conclusion shows that: under the condition of no air conditioning refrigeration, affordable housing in the summer of indoor PMV value between 1.5 to 2. That means still need to improve indoor thermal environment. On the same floor, northwest toward family indoor is the highest temperature. The second is the southeast toward the door. Is now moving toward family again. In terms of the southeast toward the door. Along with the higher floors. Inside the room temperature throughout the day is on the high side. In the same room window amplitude is significantly higher than the internal temperatures fluctuation. All the room doors and Windows open hole size directly affect the indoor temperature fluctuation speed.DeST- h simulation software is used to calculate analyzes five kinds of the external window shading coefficient’s influence on the indoor air temperature. Results show that the lower the shading coefficient of the lower room temperature; Low heat reflective coated glass and low-e hollow glass best cooling effect. The window wall area ratio of the simulation analysis shows that the overall indoor air temperature with the window wall area ratio and reduce. But the peak temperatures reduce the effect toward the door is not the same. Northwest toward reducing the best effect. The southeast toward the second. South toward the minimum. In the window wall area ratio loss equal, indoor air temperature in the high window wall area ratio scope(0.6-0.6) to reduce the effect the most obvious. In low window wall area ratio scope(0.2-0.2) to reduce the effect is most obvious. Calculation and analyzes the effects of different shading form on the indoor air temperature. That sort of shading caused by the room temperature and cooling effect: shutter shade >horizontal shutter visor > dark curtain > horizontal baffles ≈vertical baffles > light curtains. Calculation and analysis for three kinds of external Windows forms to drop the effects of indoor air temperature. Results indicate that: the bay window indirectly increase the weak palisade structure area, causing deterioration of indoor thermal environment, indoor temperature increase is relatively flat window at up to 0.85 ℃, the concave window design, makes the choice of panels and wall have the effect of shading structure, indoor temperature drop is relatively flat window at up to 0.45 ℃.