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建筑中应用顶光由来已久,但最初大多是垂直天窗,如工业建筑中的锯齿形天窗或M形天窗,后来才出现各种形式的玻璃顶。能源危机出现以后,建筑师开始注意建筑节能问题。玻璃顶能不能满足建筑围护结构的热工要求呢?国外一些建筑师认为,如果把采暖、空调和照明的能耗作一全面估量,设计得好的玻璃顶,由于降低照明负荷而带来的节约,会超过因加大热耗而增加的费用。玻璃顶的照度可以是同样面积侧窗照度的五倍或五倍以上。因此,重视节能的结果,玻
The use of roof light in buildings has been a long time ago, but initially most of them were vertical skylights, such as sawtooth-shaped skylights or M-shaped skylights in industrial buildings. Later, various forms of glass roofs appeared. After the energy crisis emerged, architects began to pay attention to building energy conservation. Can the top of the glass be able to meet the thermal requirements of the building envelope structure? Some foreign architects believe that if the energy consumption of heating, air conditioning and lighting is taken as a comprehensive measure, a well-designed glass top will be brought about by reducing the lighting load. The savings will exceed the cost of increased heat consumption. The illumination of the top of the glass may be five or more times the illumination of the side windows of the same area. Therefore, attention is paid to the result of energy conservation.