Contributions of energy-saving technologies to building energy saving in different climatic regions of China
Contributions of energy-saving technologies to building energy saving in different climatic regions of China
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我国不同气候区节能技术对建筑节能的贡献
DOI：
10.1016/j.applthermaleng.2017.06.065
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发表时间：
2017-09
影响因子：
6.4
通讯作者：
Haie Huo;Junhu Shao;H.E. Huo
中科院分区：
文献类型：
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作者：
Haie Huo;Junhu Shao;H.E. Huo
在中国，常用的节能技术(EST)包括屋顶和外墙的外保温、遮阳技术和自然通风。众所周知，相同的EST在不同的气候区域表现出不同的影响。在非稳态条件下，采用有限体积法定量研究了围护结构在年负荷中的贡献率和建筑围护结构对节能的贡献率。选取了一座具有代表性的单体建筑作为案例模型。选取沈阳、北京、成都、广州四个典型城市代表中国的不同气候区域。结果表明，应采取节能措施的关键部位是屋面和外墙。在所有四个气候区域，外保温对建筑模型的节能贡献占主导地位。此外，还应根据气候条件应用遮阳装置。自然通风在建筑设计中是值得采用的，因为它除了在中国严寒地区外，不需要基建投资。
In China, the commonly used energy-saving technologies (ESTs) include the external insulation for roof and external wall, shading technology and natural ventilation. It is well known that the same EST demonstrates different effects in different climatic regions. In this study, the contribution rates of building envelopes in annual load and that of ESTs in energy saving are quantitatively investigated with the Finite Volume Method under unsteady-state conditions. A representative individual building is selected as the case model. Four typical cities of Shenyang, Beijing, Chengdu and Guangzhou are selected to represent different climatic regions of China. Results show that the critical parts where the energy-saving measures should be taken are roof and exterior wall. The contribution of external insulation dominates in the energy saving of the building models in all of the four climatic regions. In addition, shading device should be applied based on the climatic conditions. Natural ventilation is worth using in building design as it requires no capital investment except in severe cold zones in China.