建筑节能

2014, v.42;No.276(02) 44-48

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间歇式、分室用能下墙体保温构造对能耗影响的数值分析
Numerical Study on Wall Insulation Construction Affecting the Energy Consumption under the Intermittent and Loculose Energy Use

朱耀台;张佚伦;吴敏莉;钱晓倩;
ZHU Yao-tai;ZHANG Yi-lun;WU Min-li;QIAN Xiao-qian;College of Civil Engineering and Architecture, Zhejiang University;Huaxin Consulting Co. Ltd;

摘要(Abstract):

针对夏热冬冷地区的间歇式与分室用能特点对建筑能耗的影响,采用DeST软件逐时动态模拟分析了典型居室围护墙体在不同内外保温下夏季3个月的空调总能耗,采用Fluent软件逐秒动态模拟分析夏季1014 d内不同内外保温构造体系下的围护墙体表面温度和各项热流,从而得出了能量耗散方式。研究结果显示,仅外墙做外保温时节能率小于5%,低于外墙内保温,当内外墙均采用内保温时可大大提高节能率;在非稳态条件下,墙体温度波动幅度远小于室外环境温度,最高温度与最低温度仅相差214 d内不同内外保温构造体系下的围护墙体表面温度和各项热流,从而得出了能量耗散方式。研究结果显示,仅外墙做外保温时节能率小于5%,低于外墙内保温,当内外墙均采用内保温时可大大提高节能率;在非稳态条件下,墙体温度波动幅度远小于室外环境温度,最高温度与最低温度仅相差23℃左右;若采用外保温,温度变化范围更小,仅为0.5℃左右;不同围护墙体保温方式的空调能耗差异主要反映为墙体内表面的热流大小,在夏热冬冷地区的局部用能特点下,向内墙耗散热流为主要部分。
For characteristics of intermittent and loculose energy use in hot summer and cold winter zone, the software DeST was adopted for hourly dynamic simulation analysis for the summer cooling energy consumption of different interior and outer structure systems. Then the software Fluent was adopted for dynamic simulation analysis by seconds for the enclosure structure's surface temperature and heat flow within 103℃左右;若采用外保温,温度变化范围更小,仅为0.5℃左右;不同围护墙体保温方式的空调能耗差异主要反映为墙体内表面的热流大小,在夏热冬冷地区的局部用能特点下,向内墙耗散热流为主要部分。
For characteristics of intermittent and loculose energy use in hot summer and cold winter zone, the software DeST was adopted for hourly dynamic simulation analysis for the summer cooling energy consumption of different interior and outer structure systems. Then the software Fluent was adopted for dynamic simulation analysis by seconds for the enclosure structure's surface temperature and heat flow within 1014 days. The results show that the energy-saving rate is less than 5% in hot summer and cold winter zone when only outer wall is in exterior insulation, but if the outer and interior walls are all in the internal thermal insulation, the energy-saving rate will be greatly improved. Under the condition of unsteady, wall temperature fluctuation is far less than the outdoor environment temperature, and the range of maximum and minimum temperature is only 214 days. The results show that the energy-saving rate is less than 5% in hot summer and cold winter zone when only outer wall is in exterior insulation, but if the outer and interior walls are all in the internal thermal insulation, the energy-saving rate will be greatly improved. Under the condition of unsteady, wall temperature fluctuation is far less than the outdoor environment temperature, and the range of maximum and minimum temperature is only 23 ℃, besides the range will be smaller only to 0.5 ℃ or so if using external thermal insulation. The air conditioning energy consumption differences with different retaining structures mainly reflected as the size of heat flux on the interior surface of the wall. Base on the intermittent and loculose energy use characteristics in hot summer and cold winter zone, the heat flux dissipated on interior wall are the main part.

关键词(KeyWords): 间歇式用能;保温构造;能耗;动态模拟
intermittent energy use;insulation construction;energy consumption;dynamic simulation

Abstract:

Keywords:

基金项目(Foundation): “十二五”国家科技支撑计划课题(2012BAA10B01)

作者(Authors): 朱耀台;张佚伦;吴敏莉;钱晓倩;
ZHU Yao-tai;ZHANG Yi-lun;WU Min-li;QIAN Xiao-qian;College of Civil Engineering and Architecture, Zhejiang University;Huaxin Consulting Co. Ltd;

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