基于隔热采光性能的建筑百叶综合节能效果研究

Analysis on comprehensive energy-saving effect of venetian blind based on heat-proof and daylighting performance

本文从隔热和采光性能出发,研究了建筑百叶对室内制冷能耗和照明能耗的综合影响,并提出以光热综合能耗来全面评估其节能性。依据软件模拟无遮阳、45°以及90°开启百叶三类模型在夏季典型日的制冷负荷与所需光通量,计算出建筑窗体引起的光热综合能耗。结果表明:在使用光效较低的灯具时,90°开启百叶比无遮阳情况节能13%,而使用光效高的灯具时,90°开启百叶比无遮阳情况节能29%,但45°开启百叶的节能效果与其相差不大。当根据室外光热环境对百叶进行合理控制时,光热综合能耗将会更小,节能率高达40%。

This paper estimates the energy-saving effect of venetian blinds, according to both heat-proof and daylighting performance. Comprehensive Energy consumption combined with cooling and lighting is raised to assess the energy-saving potential of venetian blinds completely. On basis of simulation to cooling load caused by fenestration and insufficient luminous flux, energy consumption combined with cooling and lighting of three different models, which are non-sunshade device, blind with 45 degree or 90 degree salt angle, can be calculated hourly during a summer typical day. The results indicate that when artificial light with low light efficiency is used, the energy-saving rate of the blind with 90 degree slat angle model is 19% compared to the unshaded window model. When artificial light with high light efficiency is used,＇its energy-saving rate is 29%, and the blind with 45 degree slat angle model also has a good energy-saving effective. Moreover, a reasonable control strategy for blinds contributes to a higher energy- saving rate, which reaches 40%.