基于状态空间的空调用表面式换热器动态建模

Dynamic Modeling for Surface Heat-exchanger Based on State-space

在合理简化复杂物理模型的基础上,建立了表面式换热器的动态换热状态空间模型,推导出了表面式换热器出口参数与各进口参数间的动态关系式;动态模拟仿真得到出口参数随各进口参数扰动而发生的变化;并基于实验对空气和水的传热系数以及传质系数进行了修正。通过实验进行了验证,新建模型能较好的反映表面式换热器出口参数对各扰量的动态响应特性,可以满足系统分析需求,为设计出优良的控制系统,保证空调系统稳定运行奠定理论基础。

Based on the reasonably simplified physical model,a dynamic model for surface heat-exchanger is developed by using the state-space method.The dynamic relationship between the outlet and the inlet parameters of heat-exchanger is deduced during the model development.The coefficients of heat and mass transfer in the model are adjusted as well by using the experimental data.The dynamic model is validated by experiments,which manifests that the state-space model established in this paper works well in the dynamic simulation of surface heat-exchanger.