等效焓降法在大型机组抽汽供热的热经济性分析中的应用  

Application of Equivalent Enthalpy Drop Theory for the Analysis Economical Efficiency of Steam Extraction and Heat Supply for a Large-sized Power Plant

作　　者：陈媛媛[1] 周克毅[1] 李代智[1] 徐啸虎[1] 

机构地区：[1]东南大学能源与环境学院,南京210096

出　　处：《汽轮机技术》2009年第6期410-412,416,共4页Turbine Technology

摘　　要：主要是关于等效焓降法在大型机组抽汽供热的热经济性分析中的应用。用等效焓降法对某台超临界机组两种不同的抽汽供热方案的热经济性进行计算分析。等效焓降法的计算结果和常规热平衡法完全一致,表明等效焓降法应用的正确性。而且再热器冷段供热的热经济性优于再热器热段供热,在满足锅炉和汽轮机运行安全的基础上,可以选择再热冷段供热。The paper is about application of equivalent enthalpy drop method for the analysis economical efficiency of steam extraction and heat supply for a large-sized power plant. Use the equivalent enthalpy drop method to make calculation and economical analysis for the two different extraction heating programs of a 600MW supercritical power plant. In accordance with the calculation, a completely same conclusion between equivalent enthalpy drop method and conventional heat balance method prove to the correctness of the application, and furthermore, it is more economical to use the project of steam extraction in front of the reheater than another project of steam extraction behind the rehcater. Thus based on the prerequisite of the safe operation of the boiler and the steam turbine ,we had better choose the project of steam extraction in front of the reheater.

关 键 词：等效焓降 大型机组 抽汽 经济性分析 

分 类 号：TK212.4[动力工程及工程热物理—动力机械及工程]