电站直接空冷系统两种热力计算方法比较

摘要

以某电厂330 M W发电工程直接空冷系统为例，采用对数平均温差法法与ε‐传热单元数法两种方法分别进行详细设计计算及校核，同时进行了对数平均温差法法与传热单元数法的变工况计算，并将计算结果进行对比分析，为直接空冷系统的设计计算提供参考。%Taking the 330 MW power generation project of a thermal power plant for example , logarithmic mean temperature difference and ε‐number of transfer unit are used respectively to finish detail design calculation and checking .Meanwhile ,comparing and analyzing the off‐design performance of the logarithmic mean temperature difference and ε‐number of transfer unit ,it will provide reference for design and calculation of the direct air‐cooling system .