不同喷水减温方式对机组热经济性的影响  

Influence of different spray desuperheating modes on the thermal economy of unit in power plant

作　　者：殷捷[1] 王培红[1] 

机构地区：[1]东南大学能源与环境学院,南京210096

出　　处：《华东电力》2009年第10期1782-1784,共3页East China Electric Power

摘　　要：喷水减温系统是火电厂热力系统的重要组成部分,影响机组的热经济性。以国产亚临界300 MW机组的3种典型运行工况为对象,分别以主、再热汽温相同降温幅度和相同减温喷水量为假设前提,利用评价不同喷水减温方式对机组热经济性影响的等效焓降模型,计算了过热器喷水减温和再热器喷水减温在不同方式下对机组热经济性的影响。计算结果不仅揭示了两种假设前提对结论的不同影响,而且对喷水减温系统的经济运行具有指导意义。The spray desuperheating system, an important component of thermodynamic system in thermal power plants, directly impacts the thermal economy of the unit. On the hypothesis that the temperature of the main steam and the reheating steam experience the same temperature drop and the spray desuperheating flow rate are also of the same, by using the equivalent enthalpy drop model that evaluates the influence of different spray desuperheating modes on thermal economy, the influence of spray desuperheating of superheaters and reheaters on unit thermal economy were calculated respectively under three typical operational conditions of the domestically-made subcritieal 300 MW unit.

关 键 词：火电厂热力系统 喷水减温方式 等效焓降模型 变工况 机组热经济性 

分 类 号：TM621.4[电气工程—电力系统及自动化]