室内外边界朝向差异下的外墙传热系数优化设计  

OPTIMIZATION DESIGN OF HEAT TRANSFER COEFFICIENT OF EXTERIOR WALL WITH INDOOR AND OUTDOOR BOUNDARY ORIENTATION DIFFERENCE

作　　者：刘瑶 桑国臣[1] 龙凯晨 程芳玥 LIU Yao;SANG Guo-chen;LONG Kai-chen;CHENG Fang-yue(School of Civil Engineering and Architecture,Xi'an University of Technology,710048,Xi'an,China)

机构地区：[1]西安理工大学土木建筑工程学院,西安710048

出　　处：《建筑技术》2023年第17期2139-2143,共5页Architecture Technology

摘　　要：为探究室内外热作用朝向差异对多空间太阳能建筑外墙传热特性的影响,选取拉萨、银川、西安3个地区,通过稳态计算的方法对建筑各朝向外墙传热系数进行优化设计,并分析室内外双侧边界差异条件下,多空间太阳能建筑外墙的传热系数优化前和优化后的日均节能量。结果表明:各朝向外墙优化传热系数存在明显差异,这种差异的大小取决于室内外双侧边界条件,不同朝向外墙室内外传热温度的差异越大,外墙优化传热系数和日均节能量也越大,其中拉萨地区日均节能量为152.73 kJ,银川地区为320.25 kJ,西安地区为681.45 kJ。可见,建筑外墙传热系数的优化可以有效减少外墙热量损失。In order to explore the influence of the orientation difference of indoor and outdoor thermal effects on the heat transfer characteristics of the external walls of multi-space solar buildings,three regions of Lhasa,Yinchuan and Xi'an were selected.The heat transfer coefficients of the external walls of each orientation were optimized by steady-state calculation,and the optimal heat transfer coefficients of the external walls of multi-space solar buildings under the difference of indoor and outdoor bilateral boundary conditions and the optimized daily average energy saving were analyzed.The results show that there are obvious differences in the optimal heat transfer coefficients of the external walls with different orientations.The size of this difference depends on the boundary conditions of the indoor and outdoor sides.The greater the difference in the indoor and outdoor heat transfer temperature difference of the external walls with different orientations,the greater the difference in the optimal heat transfer coefficient of the external walls and the average daily energy saving.The average daily energy saving in Lhasa is 152.73 kJ,that in Yinchuan is 320.25 kJ,and that in Xi'an is 681.45 kJ.It can be seen that optimizing the heat transfer coefficient of building exterior wall can effectively reduce the heat loss of exterior wall.

关 键 词：太阳能 乡村建筑 建筑节能 传热系数 

分 类 号：TK512[动力工程及工程热物理—热能工程]