矿用热管换热器析湿工况换热分析

Heat transfer of mine heat pipe heat exchanger in dehumidifying conditions

当前矿井回风用热管换热器的设计换热效果与实际应用情况偏差较大。通过基于焓差的Threlkeld法分析了矿井回风析湿工况下的传热系数和翅片效率,进而建立了单根热管换热管的换热模型,并通过逐管法对热管热换热器进行换热分析。结果表明:在实际应用环境中该换热器的总传热系数变化不大,可看作定传热系数传热。换热器的矿井回风与换热器回风侧热管外壁翅片表面温度相差很大,应保证换热器回风侧热管外壁翅片表面温度大于0℃。

At present,the design of heat transfer effect of heat pipe heat exchanger for mine return air has great deviation from the actual application.Threlkeld method based on enthalpy difference is used to analyze the heat transfer coefficient and fin efficiency under the mine return air in dehumidifying conditions.Furthermore,the heat transfer model of single heat pipe heat pipe is established,and the heat transfer analysis of heat pipe heat exchanger is carried out by the method of pipe by pipe.The results show that:in practical application,the total heat transfer coefficient of the heat exchanger changes subtly,so it can be regarded as fixed heat transfer coefficient.There is a big difference between the mine return air and the surface temperature of heat pipe fins on the return air-side of heat exchanger,so the surface temperature of the return air-side of heat exchanger should be greater than 0℃.