摘要
在建筑环境系统动态热模拟相关研究中,往往将末端设备的(冷)热量作为对流热纳入室内空气热平衡方程中。对于集中供暖系统,不同末端形式的供热量中,对流热、辐射热的比例存在较大差异,进而对供暖系统在调控过程中的热惯性、延迟等热响应特性产生重要影响。本文基于状态空间法,利用MATLAB进行建模,通过考虑不同末端设备的对流辐射比例差异,推导出辐射换热比与房间热特性系数的关联公式,并通过模拟案例分析不同末端采暖系统的热响应差异。
In the research of dynamic thermal simulation of building environment system,the(cold)heat quantity of heating terminal equipment is often included in the indoor air heat balance equation as convective heat transfer.For the central heating system,there are great differences in the ratio of convective and radiant heat transfer in different heating terminal equipment,which has an important impact on the thermal inertia,resident time and other thermal response characteristics of the heating system in the regulation.Based on the state space method and MATLAB,this paper deduces the correlation formula between radiation heat ratio and room thermal characteristic coefficient by considering the difference of convection-radiation ratio of different heating terminal equipment,and analyzes the difference of thermal response of different terminal equipment heating systems through simulation cases.
作者
陈卓
徐宝萍
蒋沛宏
Chen Zhuo;Xu Ba oping;Jiang Peihong(North China Electric Power University)
出处
《区域供热》
2022年第3期1-12,共12页
District Heating
基金
国家自然科学基金资助项目“基于模型预测控制的散热器采暖系统末端通断调节机理及优化方法研究”(51708210)
中央高校基本科研业务费专项资金资助项目“基于室内空气质量和节能分析的通风优化方法”(2018MS023)。
关键词
供暖
系统
末端
热响应特性
对流辐射比
状态空间法
heating
system
terminal
thermal responsive characteristic
radiant-convective ratio
state space method
