论文部分内容阅读
考虑墙体传湿对传热负荷的影响,建立非稳态热湿耦合模型模拟墙体的热湿传递过程,运用P1-P2经济分析模型对夏热冬冷地区4个典型城市(成都、上海、长沙、韶关)典型外墙不同朝向的最佳保温层厚度进行了确定。结果表明,各城市墙体的保温层厚度差别明显,且最小保温层厚度出现在南墙;采用最佳保温层厚度时,不同朝向的墙体节能效益不同,东、西墙的节能效益好,南、北墙的节能效益差;当整个建筑外墙采用主朝向的最佳保温层厚度时,与考虑朝向时相比,成都、上海和长沙外墙总传热量小幅度增加,净现值分别减少了0.033%、0.104%、0.124%,韶关外墙总传热量小幅度减少,净现值减少了0.155%。
Considering the influence of wall moisture transfer on heat transfer load, the heat and moisture transfer process of the wall is simulated by the unsteady heat and moisture coupling model, and the four typical cities (Chengdu, Shanghai , Changsha, Shaoguan) for the typical facade of different orientations of the best insulation thickness was determined. The results show that the thickness of insulation layer in each city wall is obviously different, and the minimum thickness of insulation layer appears in the south wall. When the optimal thickness of insulation layer is adopted, the energy efficiency of the wall with different orientations is different, The energy-saving benefits of the south and north walls are poor. When the thickness of the main facade is the best, the total heat transfer increases slightly in the outer walls of Chengdu, Shanghai and Changsha, respectively, and the net present value Decreased by 0.033%, 0.104% and 0.124% respectively. The total heat transfer of Shaoguan external walls decreased slightly, and the net present value decreased by 0.155%.