等效焓降扩展算法的比较和联合应用

等效焓降法用于分析热力系统、计算热经济性指标时，十分简便、迅速，而且运算结果准确，所以应用也很广泛。面对热力系统中不同的问题和要求，我国学者在等效焓降法的基础上，提出了很多不同的改进算法。与等效焓降法相比，它们在具体问题和要求上更有针对性。对其中的部分算法进行分析和比较，并得出一个改进的等效抽汽法的计算模型，最后给出一个运用这个方法的算例。

Comparison on Algorithms Based on Equivalent Enthalpy Drop Method and Their Combined Application

The equivalent enthalpy drop method has been used widely for it is very brief and exact to analyze thermal systems. Different algorithms base on it have been developed for different problems by our scholars. Compared with the equivalent enthalpy drop method, these algorithms are more effective in dealing with the idiographie problems. The paper compares parts of these algorithms, improves the equivalent extraction steam method, and gives an example using the new method.