The effects of external wall insulation thickness on annual cooling and heating energy uses under different climates

详细信息	查看全文 | 推荐本文 |

• 作者：Dongmei Pan^a ; Mingyin Chan^a ; Shiming Deng^a ; ^{besmd@polyu.edu.hk} ; Zhongping Lin^b
• 关键词：External wall insulation ; Annual cooling and heating energy uses ; Energy Gain Ratio (EGR) ; Relative Variation Ratio (RVR) of the sum of annual cooling and heating energy uses ; Thickness
• 刊名：Applied Energy
• 出版年：2012
• 期刊代码：2_03062619
• 类别：pw
• 出版时间：September, 2012
• 卷：97
• 期：Complete
• 页码：313-318
• 文件大小：647 K

摘要

External wall insulation plays an important role in building energy consumption through affecting cooling and heating energy uses. In this paper, a study on the effects of external wall insulation thickness on annual cooling and heating energy uses under different Chinese climates is reported. Firstly, two indexes: Energy Gain Ratio (EGR) and Relative Variation Ratio (RVR) of the sum of annual cooling and heating energy uses, to assess the effects of external wall insulation thickness on energy saving potential are introduced. Secondly, a model space having four different exterior zones facing four different orientations in an office building is presented and the settings of the model space described. Lastly, the simulated annual cooling and heating energy uses for the four different exterior zones at different external wall insulation thicknesses under three different climates in China, Guangzhou, Shanghai and Beijing, are reported. The results suggested that energy saving was significant by increasing the external wall insulation thickness in exterior zones facing all orientations under Beijing鈥檚 climate, since the heating energy use was dominant and can be reduced remarkably with the increase in insulation thickness. Under Shanghai鈥檚 climate, increasing external wall insulation thickness to over 26 mm would not reduce the sum of annual heating and cooling energy uses in the south-facing exterior zone, but would help save energy in exterior zones facing the other three orientations. For all exterior zones under Guangzhou鈥檚 climate, it was, however, hardly possible to reduce the sum of annual heating and cooling energy uses by increasing the external wall insulation thickness.