夏热冬冷地区被动房的外围护结构热工参数研究

发布时间：2018-06-13 17:13

  本文选题：被动房 + 建筑能耗　； 参考：《南京工业大学》2015年硕士论文

【摘要】：近年来,国内居住建筑节能正向着高水平的目标不断前进,德国被动房代表着建筑最高水准,但德国被动房不适应夏热冬冷地区气候,在夏热冬冷地区推广被动房,需要综合分析后确定,还不能直接采用德国被动式建筑的技术标准。本文主要采用数值模拟的方法研究被动房在夏热冬冷地区适应性问题和适合夏热冬冷地区的被动房围护结构热工参数取值,其中通过实验的方法来验证数值模拟计算的准确性。本文提出夏热冬冷地区被动房标准,即通过围护结构热工体系的改善,使得供暖空调负荷达到最低(不包括新风和生活热水)。在夏热冬冷地区中选取南京城市为例,选取南京地区典型居住建筑采用建筑能耗模拟软件DeST-h建模,分析其全年空调供暖能耗。居住建筑的能耗与供暖空调使用模式有关。通常居住建筑都是间歇使用,但我国居住建筑节能标准计算均以连续使用为计算基准,为与之对应,本文仍采用连续模式为计算基础,所有的房间均同时参与供暖空调。通过本文的研究,得出以下结论：(1)德国被动房适应寒冷地区的气候,在夏热冬冷地区推广被动房,不能直接套用德国被动房技术标准。(2)夏热冬冷被动房的标准,应该是通过围护结构热工体系的改善,使得居住建筑供暖空调负荷达到最低(不包括新风和生活热水),这时所对应的围护结热工体系可作为夏热冬冷地区被动房的推荐标准。(3)不开窗通风时,降低外墙和外窗传热系数,室内温度超过29℃的天数会大幅增加,过渡季附加空调负荷显著上升。夏热冬冷地区过度季适时开窗通风可有效减少过度季室内超温时间。(4)连续运行模式下,0.1h-1换气次数时,窗户传热系数取1.5 w/m2·K、墙体传热系数取0.4 w/m2·K,供暖空调负荷已趋于稳定,可以此参数作为夏热冬冷地区被动房的推荐值。由于实际上室内换气次数需达到1次左右,室内还要配置新风换气装置,窗户气密性保持6级气密性即可。如果供暖空调系统采用间歇运行模式,以上热工参数还需调整。
[Abstract]:In recent years, the energy efficiency of domestic residential buildings is advancing to a high level. Passive housing in Germany represents the highest building level. However, passive housing in Germany does not adapt to the climate in hot summer and cold winter, so passive housing is popularized in hot summer and cold winter. The technical standard of German passive building should not be adopted directly after comprehensive analysis. In this paper, the method of numerical simulation is mainly used to study the adaptability of passive housing in hot summer and cold winter area and the thermal parameter selection of passive housing enclosure structure suitable for hot summer and cold winter area, among which the accuracy of numerical simulation calculation is verified by experimental method. This paper puts forward the passive house standard in hot summer and cold winter area, that is, through the improvement of thermal system of enclosure structure, the load of heating and air conditioning can reach the minimum (excluding fresh air and domestic hot water). In the hot summer and cold winter area, Nanjing city is selected as an example, and the building energy consumption simulation software DeST-h is used to model the typical residential buildings in Nanjing area, and the annual energy consumption of air conditioning and heating is analyzed. The energy consumption of residential buildings is related to the use mode of heating and air conditioning. Usually residential buildings are intermittently used, but the standard calculation of energy saving of residential buildings in our country takes continuous use as the basis of calculation, and corresponding, this paper still uses the continuous mode as the basis of calculation, all the rooms participate in the heating and air conditioning at the same time. Through the study of this paper, the following conclusions can be drawn: (1) the passive housing in Germany adapts to the climate in the cold area, and the passive room in the hot summer and cold winter area can not be directly applied to the technical standard of the German passive room in the hot summer and the cold winter, and the standard of the passive room in the hot summer and cold winter can not be directly applied. It should be through the improvement of the thermal system of the enclosure, When the heating and air conditioning load of residential buildings reaches the minimum (excluding fresh air and domestic hot water, the corresponding envelop thermal system can be used as the recommended standard for passive houses in hot summer and cold winter areas.) when windows are not opened and ventilated, When the heat transfer coefficient of exterior wall and exterior window is reduced, the days of indoor temperature exceeding 29 鈩，

本文编号：2014760