针对上述问题，文中首先对理想循环热效率的定义方法进行了改进。
To counter the problems above, the defining method of ideal cycle heat efficiency is improved firstly.
然后，基于改进的理想循环热效率，提出了等效热降法的改进算法。
Then based on the improved ideal cycle heat efficiency, the improved equivalent enthalpy drop method is given.
目前采用的汽轮机理想循环热效率受到相对内效率影响而不能准确反映汽轮机热力系统运行经济状态。
The ideal cycle heat efficiency used nowadays is affected by the relative internal efficiency so it can't reflect the operation economic state of thermal system of steam turbine.
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