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安庆市外窗通风及热工性能的节能效果分析
作者：杨帆1，2，3，胡浩威1，2，3，4，曹静怡2，3，方廷勇3，4
（1.安徽建筑大学 环境与能源工程学院，安徽 合肥 230601；2.安徽省BIM工程中心，安徽 合肥 230601；
3.安徽省绿色建筑先进技术研究院，安徽 合肥 230601；4.智能建筑与建筑节能安徽省重点实验室，安徽 合肥 230022）
摘要：基于DeST-C软件，以安庆市某办公建筑为研究对象，模拟研究外窗热工性能及自然通风换气次数对建筑冷热负荷的影响。研究发现，减小外窗遮阳系数的节能效果更加明显，当建筑外窗的传热系数取2.2～2.4 W/（m2·K），遮阳系数取0.30～0.40时，设普通单玻为基准，耗热量降低了25%～29%，耗冷量降低18%～20%，冷热总量降低22%，生命周期费用节约1.65%～2.00%。而夏季冷负荷还与通风效果密切相关，应合理利用自然通风，以降低空调制冷能耗，建议夏季的换气次数为5次/h。
关键词：外窗热工性能；自然通风；建筑能耗；遮阳系数
中图分类号：TU111.4 文献标识码：A 文章编号：1001-702X（2020）06-0101-05
Analysis on energy-saving effect of ventilation and thermal performance of exterior window in Anqing
YANG Fan1，2，3，HU Haowei1，2，3，4，CAO Jingyi2，3，FANG Tingyong3，4
（1.School of Environmental and Energy Engineering，Anhui Jianzhu University，Hefei 230601，China；2.Anhui BIM Engineering Center，Hefei 230601，China；3.Anhui Institute of Advanced Technology of Green Building，Hefei 230601，China；
4.Anhui Province Key Laboratory of Intelligent Building and Building Energy Saving，Hefei 230022，China）
Abstract：Based on DeST-C software，taking an office building in Anqing as the research object，the effects of thermal performance of exterior windows and natural ventilation times on building cooling and heating loads were simulated. The results show that the energy-saving effect of reducing the shading coefficient of exterior windows is more obvious. When the heat transfer coefficient of the building's exterior window is 2.2～2.4 W/（m2·K），and the shading coefficient is 0.30～0.40，ordinary single glass is set as the benchmark，the heat consumption is reduced by 25%～29%，the cooling volume is reduced by 18%～20%，the total amount of cold and heat is reduced by 22%，and the life cycle cost is saved by 1.65%～2.00%. The cooling load in summer is also closely related to the ventilation effect，so natural ventilation should be reasonably used to reduce the energy consumption of air conditioning and refrigeration. It is suggested that the air change frequency in summer can be 5 times per hour.
Key words：thermal performance of exterior window，natural ventilation，building energy consumption，shading coefficient