基于HEI和ASME PTC方法凝汽器性能计算分析及应用

Calculation and Application of Condenser Performance Based on HEI and ASME PTC Methods

介绍了两种常用的凝汽器传热性能修正计算方法,HEI法和ASME PTC12.2法(简称:HEI法和PTC法),并借助凝汽器变工况试验数据对两种方法进行了验证。结果表明,HEI法基于大量的凝汽器模型实验数据归纳而来,当凝汽器管束布置与HEI管束布置差异较大时,仍采用此法计算将会带来较大的误差。PTC法遵循凝汽器传热机理——四层传热热阻,无论凝汽器设计怎么变化,不会超出传热机理的范畴,故PTC法比HEI法更适用于新型凝汽器的变工况计算。

The HEI method and the ASME PTC12.2 method(HEI method and PTC method for short)are introduced in this paper,and the two methods are verified by the variable working condition test data of the condenser.The results show that:HEI method is based on a large number of condenser model experimental data.When there is a big difference between the arrangement of condenser bundle and that of HEI bundle,the calculation using this method will bring a big error.PTC method follows the four layers of heat transfer resistance of the condenser heat transfer mechanism.No matter how the condenser design changes,it will not go beyond the scope of the heat transfer mechanism.Therefore,PTC method is more suitable than HEI method for the variable working condition calculation of the new condenser.