辐射空调系统耦合建筑热环境的动态仿真研究

Dynamic Simulation Research of Radiant Air Conditioning System Coupledwith Building

辐射空调系统耦合在建筑内部作为参与房间换热过程的一部分,显著地影响着房间各内壁面的温度变化。采用多节点网络法建立描述结合辐射末端的房间热过程模型。将整个房间视为一个系统,房间围护结构内、外各表面及房间内空气作为网络节点。其中,房间围护结构外表面节点通过导热作用房间内表面节点,再通过辐射换热与其他内壁面实现热量的传递和联系,同时各内壁面与空气节点通过对流换热形成流体网络。通过建立基准模型来描述带辐射系统的室内各表面温度热响应特性,并通过实验验证模型准确性,为分析实际过程中的房间内空气温度及围护结构各内表面温度热响应特性提供基础。

It is crucial to grasp the dynamic characteristics of radiant air conditioning systems in the actual thermal process because the radiant system involves in building heat transfer process,affecting building inner surface temperatures significantly.By comparing the existing modeling methods of buildings and radiation plants,this paper uses the multi-node network method to establish a model that describe the combination of radiation ends of room thermal processes.The whole room is regarded as a system,the inner and outer surfaces of the room envelope and the air in the room as the network node in this system.The outer surface node of the room envelope transfer heat to inner surface node of the room through the thermal conduction,radiation heat transfer process occurs between inner wall surfaces,while the inner wall surface and the air node through convective heat exchange to become a fluid network.By establishing a base model to describe the temperature and thermal response characteristics of each surface in the room with radiation system,and verifying the accuracy of the model through experiments,it provides a basis for analyzing the temperature and thermal response characteristics of the inner surface of the room and indoor air in the actual process.