建筑采光和遮陽-許鵬(編輯修改稿)
2024-09-19 13:28 本頁面
【文章內(nèi)容簡介】 . East is not important 8. The shade’s color modifies light and heat. 9. Movable shading is better than fixed shade. Use movable devices if budget is allowed West shading is hardest, vertical louvers sometimes not working Ways to reduce overhang size Reducing the size of overhang furthermore Allow lighting to e in Design shading for glare relief as well. Use exterior shading to reduce glare by partially blocking occupants’ view of the toobright sky. ? Dirt accumulation on blades, negative effects on building appearance ? Poor reliability. Actuators and mechanical systems are prone to failure due to exposure to wind, sun and rain. ? Difficult to repair. ? Visually unattractive. ? To avoid glare, blades are typically shut off in winter and useful solar heat is blocked too From thermal point of view, exterior shading systems are perhaps one good solution, because direct solar radiation is pletely blocked outside of buildings. However, it has the following shortings: Practical problems Interior shading system ? Need to be cleaned and maintained regularly ? Prone to damage. Furniture moving, indoor activities will inevitably damage the shutter. ? No automatic adjustment. Interior blinds are left open or closed as they were, till someone feels disfort with the glare. Interior shading systems overe the shortings of exterior shading systems, but on the thermal side, they are not as effectively as exterior shading. Although solar radiation is blocked, solar heat are retained indoor in summer. Beyond that, other shortings include: Double facades with ventilation ? Ventilated fa231。ade still have dirt problem. Dirt accumulated inbetween the fa231。ade is hard to clean ? Interior recycling ventilated double fa231。ades are useless thermal dynamically, because all the heat is still trapped indoor. ? High cost. Need two layers of window systems. Double the building cost. Ventilated double facades with shading in between are better than interior and exterior shading system. However, they have several drawbacks: Shading in between the glasses, dynamic facade Contents 內(nèi)容綱要 ? Importance of shading control and daylighting 遮陽和自然采光的重要性 ? Shading strategies 常見遮陽策略 ? Day lighting and building
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