夏热冬冷地区超低能耗建筑热工优化设计及负荷分析

Thermal Design Optimization and Analysis on Load of Ultra-Low Energy Buildings in Hot Summer and Cold Winter Regions

超低能耗建筑已在全世界范围内得到推广,德国超低能耗技术体系较为完整,而我国夏热冬冷地区还未有根据气候条件及用能特征建立起的适应于夏热冬冷地区的气候适应型超低能耗建筑采暖供冷技术路线。本文对夏热冬冷地区超低能耗建筑围护结构的优化设计进行了研究探索,利用EnergyPlus进行建模分析,通过正交试验设计方法,研究外窗、外墙、屋面传热系数对建筑供热负荷、制冷负荷及全年总负荷的影响,得出最优围护结构设计方案。结果表明,在外窗传热系数为2.0 W/(m^2·K),外墙和屋面的传热系数为0.2 W/(m^2·K)时,全年总负荷最低。本文的研究结果可为夏热冬冷地区超低能耗建筑围护结构的设计提供借鉴,亦可为夏热冬冷地区超低能耗建筑采暖供冷技术路线提供基础。

Ultra-low energy buildings have been promoted worldwide. In the current study. Among others,Germany＇s ultra-low energy consumption technology system is relatively more complete. Yet,no climate-adaptive ultra-low energy building heating and cooling technology route has been planned for regions with hot summer and cold winter in China. In this paper,the optimal design of ultra-low energy building envelope in regions with hot summer and cold winter was studied. Using Energy Plus for modeling analysis and orthogonal test design method,the paper studies the influence of the heat transfer coefficient of the external window,external wall and roof on the heating load,the cooling load and the annual total load to obtain the optimal envelope design scheme. The study results showed that when the heat transfer coefficient of the external window was 2. 0 W/（m^2·K）,the heat transfer coefficient of the external wall and the roof was 0. 2 W/（m^2·K） with the minimum total annual load. The results of the study will serve as the basis for the technical route planning of heating and cooling of ultra-low-energy consumption in regions with hot summer and cold winter.