Thermal properties optimization of envelope in energy-saving renovation of existing public buildings
Thermal properties optimization of envelope in energy-saving renovation of existing public buildings
复制标题
DOI：
10.1016/j.enbuild.2014.02.040
复制
发表时间：
2014-06
影响因子：
6.7
通讯作者：
Jianen Huang;H. Lv;Tao Gao;Wei Feng;Yanxia Chen;Tai Zhou
中科院分区：
文献类型：
--
作者：
Jianen Huang;H. Lv;Tao Gao;Wei Feng;Yanxia Chen;Tai Zhou
形状系数和窗墙比因建筑物而异。建筑围护结构热工性能设计的好坏直接影响着既有公共建筑节能改造的经济性。根据国家标准《公共建筑节能设计标准》（GB 50189 -2005）对围护结构设计的规定，提出了外窗和墙体的单位容积耗热量限值和等效传热系数。建立了考虑房屋朝向、窗墙比和窗类型影响的围护结构经济保温厚度和围护结构热工性能优化的数学模型。以沈阳市某既有公共建筑为例，验证了该模型的可行性。不同朝向窗墙比的变化导致围护结构的经济保温厚度和投资回收期不同。通过技术经济分析，综合考虑房屋朝向、窗墙比、保温材料类型、窗户等因素的影响，确定围护结构改造方案的优化设计。
The shape factor and windows-to-wall ratio are different from building to building. How to design the thermal properties of building envelope affects energy-saving renovation economy of existing public buildings. The limited heat consumption per unit volume and equivalent heat transfer coefficient of external windows and wall were proposed based on the prescription of China national standard “Design standard for energy efficiency of public buildings”(GB50189-2005) for envelope design. Mathematical model on economical thermal insulation thickness of building envelope and thermal properties optimizing of envelope were built considering the impact of house orientation, windows-to-wall ratio and types of windows. The model is verified to be feasible by an existing public building in Shenyang. The variation of windows-to-wall ratio for different orientation leads to the different economical thermal insulation thickness of building envelope and payback period. The project optimization design for envelope renovation could be determined by the technical and economic analysis considering the impact of house orientation, windows-to-wall ratio, types of insulation materials and windows.