夏热冬冷地区居住建筑保温墙体节能效果分析
发布时间：2018-11-16 15:09
【摘要】：对于居住建筑的墙体保温,北方一直推行墙体外保温并且取得了很好的节能效果,但是将其推广到夏热冬冷地区的居住建筑,节能效果却不甚理想。这是因为夏热冬冷地区的用能模式与北方供暖模式完全不同,因此需要结合夏热冬冷地区的用能特点,找到合适的墙体保温体系。 本文针对夏热冬冷地区间歇分室用能的特点,以房间为分析单元,选取杭州某居民楼一房间作为夏热冬冷地区用能模型,利用数值计算的方法,使用编制matlab程序,计算了基准墙体、自保温、外保温、内保温在夏季单次间歇式用能在三种工作环境下空调的耗冷量,证实自保温和内保温具有更好的,且内保温更好,而外保温墙体基本没有节能效果。通过分析能耗流向,推论出分户间歇式用能墙体蓄热对能耗有巨大影响的结论,也解释了外保温在南北方收效差异大的原因。 通过小比例模型测试,对比了内保温比外保温节能效果,并与理论分析用能关系进行了对比,证实了两者的一致性；同时通过大比例模型,对理论与实测值的误差进行了定量分析,证实了所用计算方法以及相关结论的正确合理性。 除了单次用能时间对不同墙体节能效果的影响,同时考虑了长期用能导致的不同保温墙体的节能效果的差异。长期用能中外保温墙体室内初始温度低,基于此计算得到,外保温墙体在夏热冬冷地区的长期用能过程中,是会发挥出节能作用的,但是节能效果仍旧不如内保温和自保温,当室内温度降低了5℃时,才可能与两者节能效果相当的情况。 考虑了墙体厚度在140mm—300mm范围内变化时耗冷量,得到墙体厚度对单次8h用能基本没有影响的结论。分析了窗墙比变化对冷量的影响,得到窗墙比增大时,对于单次8h用能,基准墙体和外保温墙体耗冷量减小,自保温和内保温墙体,窗墙比增大时耗冷量增加,基准墙体和外保温减小的速率大于自保温和内保温增加的速率的结论。同时得到墙体厚度和窗墙比的变化对并不影响保温墙体节能效果的优劣性的结论。
[Abstract]:For the wall insulation of residential buildings, the north has been carrying out the wall heat preservation and achieved good energy saving effect, but the energy saving effect is not ideal when it is extended to residential buildings in hot summer and cold winter area. This is because the energy use mode in the hot summer and cold winter area is completely different from that in the north, so it is necessary to find a suitable wall heat preservation system according to the energy use characteristics in the hot summer and cold winter area. In this paper, according to the characteristics of intermittent energy use in hot summer and cold winter area, a room of a residential building in Hangzhou is selected as a model of energy use in hot summer and cold winter area, and the matlab program is compiled by using numerical calculation method. The cooling consumption of air conditioning with reference wall, self insulation, external heat preservation and internal heat preservation in three working environments in summer is calculated. It is proved that self-preservation and internal insulation are better and internal heat preservation is better. Outside the insulation wall basically no energy-saving effect. By analyzing the flow of energy consumption, it is inferred that the heat storage of intermittent energy use wall has a great influence on energy consumption, and also explains the reasons for the great difference in the effect of external heat preservation in the north and south. Through the small scale model test, compared the energy saving effect of internal and external heat preservation, and compared with the theoretical analysis of the relationship between energy use, confirmed the consistency between the two; At the same time, through the large scale model, the error between the theory and the measured value is quantitatively analyzed, and the correctness and rationality of the calculation method and the related conclusions are verified. In addition to the influence of single energy use time on the energy saving effect of different wall, the difference of energy saving effect of different insulation wall caused by long term energy use is considered at the same time. The internal and external heat preservation wall room initial temperature is low. Based on this calculation, the external insulation wall will play an energy-saving role in the long term energy use process in hot summer and cold winter area, but the energy saving effect is still inferior to that of internal insulation and self-insulation. When the indoor temperature is reduced by 5 鈩，
本文编号：2335859
[Abstract]:For the wall insulation of residential buildings, the north has been carrying out the wall heat preservation and achieved good energy saving effect, but the energy saving effect is not ideal when it is extended to residential buildings in hot summer and cold winter area. This is because the energy use mode in the hot summer and cold winter area is completely different from that in the north, so it is necessary to find a suitable wall heat preservation system according to the energy use characteristics in the hot summer and cold winter area. In this paper, according to the characteristics of intermittent energy use in hot summer and cold winter area, a room of a residential building in Hangzhou is selected as a model of energy use in hot summer and cold winter area, and the matlab program is compiled by using numerical calculation method. The cooling consumption of air conditioning with reference wall, self insulation, external heat preservation and internal heat preservation in three working environments in summer is calculated. It is proved that self-preservation and internal insulation are better and internal heat preservation is better. Outside the insulation wall basically no energy-saving effect. By analyzing the flow of energy consumption, it is inferred that the heat storage of intermittent energy use wall has a great influence on energy consumption, and also explains the reasons for the great difference in the effect of external heat preservation in the north and south. Through the small scale model test, compared the energy saving effect of internal and external heat preservation, and compared with the theoretical analysis of the relationship between energy use, confirmed the consistency between the two; At the same time, through the large scale model, the error between the theory and the measured value is quantitatively analyzed, and the correctness and rationality of the calculation method and the related conclusions are verified. In addition to the influence of single energy use time on the energy saving effect of different wall, the difference of energy saving effect of different insulation wall caused by long term energy use is considered at the same time. The internal and external heat preservation wall room initial temperature is low. Based on this calculation, the external insulation wall will play an energy-saving role in the long term energy use process in hot summer and cold winter area, but the energy saving effect is still inferior to that of internal insulation and self-insulation. When the indoor temperature is reduced by 5 鈩，
本文编号：2335859
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