The concept and physical meanings of condenser’s cleanness coefficient and the modified coefficient of air content in the steam side of condensers have been described,It is suggested to use the measured standard heat transfer coefficient in good state of condensers as a standard for comparison with heat transfer coefficient of condensers.The calculation method of standard heat transfer coefficient has been analyzed,a modified calculation method of test condition for water temperature and water volume etc.in the HEI formula is put forward,a method for on-line calculating the cleanness coefficient of the condenser and modified coefficient of air content at the steam side is put forward as well.%对凝汽器清洁系数和汽侧空气量修正系数的概念与物理意义进行了论述，提出了以良好状态实测标准传热系数作为凝汽器传热系数的比较标准，分析了标准传热系数的计算方法，提出了在HEI公式中对水温、水量等试验条件的修正算法，以及在线计算凝汽器清洁系数、汽侧空气量修正系数的方法。
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