Radiation heat and convection heat exist on stratified air conditioning zone building surfaces in large space, and they have significant impact on cooling load calculation and thermal comfort analysis. Actually, heat transfer in large space is usually under non-steady condition. Based on an actual large space, a 1:4 scale model experiment rig is built as research object, which has: typical sloping ceiling structure, columnar low supply air, middle return air, inner surfaces periodic heat flow simulation system, heat measurement, and control system. For stratified air conditioning zone building surfaces in large space, radiation heat transfer calculation model is presented based on Gebhart radiation model and radiation heat is calculated by matrix calculation. Convection heat transfer calculation formula is presented based on inner surfaces temperatures and indoor air temperatures. Taking two periodic heat flow experiment conditions, building surfaces temperatures and indoor air temperatures of stratified air conditioning zone in large space were collected, taking model calculation program to compute dynamic radiation heat and convection heat. The result indicated the dynamic characteristics of radiation heat and convection heat of stratified air conditioning zone building surfaces in large space. It provided some important information for dynamic heat transfer research in stratified air conditioning zone building surfaces in large space.

大空间分层空调区建筑表面存在辐射热和对流热，对冷负荷计算和热舒适度分析有显着影响。实际上，大空间的传热通常是在非稳态条件下进行的。以实际大空间为基础，搭建1:4比例的模型实验台作为研究对象，该实验台具有：典型的斜顶结构、柱状低送风、中回风、内表面周期性热流模拟系统、热量测量、控制系统。针对大空间分层空调区建筑表面，基于Gebhart辐射模型提出辐射传热计算模型，并通过矩阵计算计算辐射热量。基于内表面温度和室内空气温度提出了对流换热计算公式。采用两次周期性热流实验条件，采集大空间分层空调区建筑表面温度和室内空气温度，采用模型计算程序计算动态辐射热和对流热。结果表明了大空间分层空调区建筑表面辐射热和对流热的动态特性。为大空间分层空调区建筑表面动态传热研究提供了重要信息。