考虑空气量影响时蒸汽凝结放热系数的计算方法分析

Analysis on the Calculating Method of Condensation Heat Transfer Coefficient with Steam Containing Air

空气量对蒸汽凝结放热系数影响的计算,目前还没有一个人们普遍公认的计算方法。文中首先对空气对轻微流动蒸汽、受迫流动蒸汽以及抽气器运行时蒸汽凝结放热系数影响进行了综述分析,然后对目前常用的几种计算空气量对蒸汽凝结放热系数影响的计算方法进行了计算分析,指出各种计算方法的特点及其存在的问题,为进一步研究空气对蒸汽凝结放热系数的影响奠定了一定的基础。

There isn't a general accepted method to calculate the effect of air on the condensation heat transfer coefficient so far. In this paper, firstly, the effect of air on the condensation heat transfer coefficient for such as almost static steam, flowing steam and steam condensation with ejector is summarized and analyzed. Then the calculating methods of condensation heat transfer coefficient with steam containing air are checked and analyzed by calculation. The characteristic and shortcoming of these calculating methods are presented. This works lay foundations for further studying the effect of air on the condensation heat transfer coefficient.