1000MW二次再热机组抽汽压损对经济性的影响分析  

Theory Cost-efficiency Analysis of Steam Extraction Pressure Loss of a 1000MW Double-reheat Unit

作　　者：柏静儒[1] 宋亮福 陈峰[2] 吴建楠[1] 曹天义[1] 

机构地区：[1]东北电力大学,吉林132012 [2]北京国电智深控制技术有限公司,北京102200

出　　处：《汽轮机技术》2017年第3期166-168,172,共4页Turbine Technology

摘　　要：以某台1000MW超超临界二次再热机组回热加热系统为研究对象,基于小扰动理论和等效焓降分析理论,全面考虑两次中间再热、外置式蒸汽冷却器、加热器布置方式和形式等因素的影响,推导出二次再热机组加热器抽汽压损对机组经济性影响的数学模型,该方法形式简单并利于理解。应用此数学模型计算机组在100%THA实际运行工况下,抽汽压损对机组经济性的影响。计算结果表明:抽汽压损使得煤耗和热耗分别增加2.7g/(kW·h)和23.7kJ/(kW·h)。In a 1000MW ultra super critical unit with double reheat regenerative heating system as the research object, based on small perturbation theory and the equivalent enthalpy drop analysis theory, taking full account of the two intermediate reheat, external steam cooler, a heater arrangement and form factors of influence, derived secondary reheat extraction steam pressure loss of heater effect on unit economic mathematical model, the form of the method is simple and easy to understand. The application of the mathematical model of computer 100% THA group in the actual operating conditions. The influence of extraction steam pressure loss on the unit economy. The calculation results show that the consumption of coal extraction steam pressure loss and heat consumption increased by 2.7 g/（ kW. h） and 23.7 k J/（ kW · h） respectively.

关 键 词：二次再热机组 等效焓降法 热经济性 抽汽压损 加热器 

分 类 号：TK412.2[动力工程及工程热物理—动力机械及工程]