基于全年动态光环境模拟条件的穿孔金属表皮参数对室内天然光环境效果的影响

Effect of Perforated Metal Skin Parameters on Indoor Natural Light Environment Effect Based on Simulation Conditions of Annual Dynamic Light Environment

穿孔金属表皮因其孔洞能够透光透风,而且具有半透明的美学效果而被建筑师广泛使用。但是由于金属表皮的存在,在遮挡太阳直射光的同时也减少了进入建筑内部的天然光,可能导致照明能耗的增加。随着人们对环境问题和建筑节能的日益重视,天然采光的研究、开发和利用已经成为国内外可持续发展的一种趋势。金属表皮作为一种可再生材料,价格不菲,本文通过对其技术参数的控制,达到相应的节约能耗的作用,充分发挥材料的价值。结合新的天然采光评价指标(DA,UDI,sDA300/50%,均匀度,UGR/DGI),在全年动态光环境模拟条件下,对穿孔金属表皮室内自然光环境进行探索。通过控制设计中的参数变量,如穿孔金属表皮的穿孔率、孔径大小,发现穿孔率大小对室内光环境效果影响较大。同时在此种模拟条件下,得到结论为当孔隙率在15%~20%之间时,室内综合采光效果最佳。

The perforated metal skin is widely used by architects because of its ability to transmit light through the holes and its translucent aesthetics.However,due to the presence of the metal skin,the direct sunlight is blocked while the natural light entering the interior of the building is reduced,which may result in an increase in lighting energy consumption.With the increasing emphasis on environmental issues and building energy conservation,the research,development and utilization of natural lighting has become a trend of sustainable development at home and abroad.As a renewable material,the metal skin is expensive.The author controls the technical parameters to achieve the corresponding energy-saving effect and give full play to the value of the material.Combined with the new natural daylighting coefficient(DA,UDI,sDA300/50%,uniformity,UGR/DGI),the natural light environment of the perforated metal skin is explored under the conditions of dynamic light environment simulation throughout the year.By controlling the parameter variables in the design,such as the perforation rate and pore size of the perforated metal skin,it is found that the perforation rate has a great influence on the indoor light environment effect.At the same time,under such simulation conditions,it is concluded that when the porosity is between 15%and 20%,the indoor integrated lighting effect is the best.