太阳能采暖水箱温度分层的仿真分析

Analysis and Simulation on Temperature Stractification of Heat Storage Tank in Solar Heating System

本文通过对太阳能采暖系统的理论分析，建立了采暖水箱模型，利用CFD软件在有无辅助加热的两种工况下，模拟水箱内部流动、换热、温度分层过程，结果表明，太阳能集热器管路水流速在0．01～0．05m／s时，水箱内部分层非常明显，水箱运行内部扰流小；流速0．09～0．35m／s，随着流速增大，水箱分层越来越不明显，水箱顶端的高温层被破坏。

A model of heat storage tank is built based on the theoretical analysis of the heating system. In the two conditions on or off the auxiliary heating, the internal flow, heat exchanger and temperature stratification of the tank are simulated with the help of CFD software. The results show when the velocity of the solar loop is between 0.01 and 0.05m/s, the layers of storage tank are very obvious ,when the velocity is between 0.09 and 0.35m/s, as the velocity increases, the high-temperature layer is destroyed in the top of the tank, finally there is no layer in the tank.