Lv Liugen, Xiang Yi, Gu Zhipan, Huang Chen
School of Civil Engineering and Architecture, 66559Jiaxing University, Jiaxing, China.
School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai, China.
Sci Prog. 2022 Jan-Mar;105(1):368504221075189. doi: 10.1177/00368504221075189.
The dynamic heat transfer of building surfaces has thermal conduction, convection and radiation at the same time. It is the basis of building thermal environment simulation, air conditioning load calculation, building energy analysis and air conditioning system conservation operation. Under cyclic heat flow, the convection and radiation separating method was used to calculate the radiation heat and convection heat of building surfaces, and dynamic characteristics of convection heat and radiation heat on building surfaces was provided in this paper. For the dynamic heat transfer of building surfaces under cyclic heat flow, three indexes of peak error, mean error and average relative error were used to analyze dynamic heat transfer. The temperature distribution and dynamic heat transfer of convection heat and radiation heat of building surfaces were studied systematically. The separating cooling load and the room cooling load were basically consistent with each other, the convection and radiation separating method was reliable and available. The peak value of convection heat corresponded to the foot value of the radiation heat, and the relative error of them was 1.9%-2.2%. The dynamic characteristics of radiation heat and convection heat had important reference for the study of dynamic heat transfer of building surfaces under cyclic heat flow.
建筑围护结构表面的动态传热同时存在热传导、对流和辐射。它是建筑热环境模拟、空调负荷计算、建筑能耗分析及空调系统节能运行的基础。在周期性热流作用下，采用对流与辐射分离法计算建筑围护结构表面的辐射热和对流热，并给出了建筑围护结构表面对流热和辐射热的动态特性。针对周期性热流作用下建筑围护结构表面的动态传热，采用峰值误差、平均误差和平均相对误差三个指标对动态传热进行分析。系统地研究了建筑围护结构表面的温度分布以及对流热和辐射热的动态传热。分离冷负荷与房间冷负荷基本吻合，对流与辐射分离法可靠且可行。对流热峰值对应辐射热谷值，二者相对误差为1.9% - 2.2%。辐射热和对流热的动态特性对研究周期性热流作用下建筑围护结构表面的动态传热具有重要参考价值。
