火电厂原则性热力系统变工况计算.docx

河北工程大学毕业设计(论文) 摘?要 火电厂热系统工况发生变动时，将会引起整个热系统和全厂的热经济性指标发生变 动。本设计主要内容为某?300MW?凝汽式机组全厂原则性热力系统变工况计算，根据给定 的热力系统及其数据，在热力系统常规计算方法的基础下，计算额定功率下，切除?2＃高 压加热器?H2?时的系统中各点汽水参数、流量和热经济指标，以及分析其经济性。根据设 计工况与变工况两组数据的计算结果作为运行和调控的依据。 关键词：原则性 热力系统 变工况 常规法 I 河北工程大学毕业设计(论文) Abstract Thermal?power?plant?thermal?system?conditions?(parameters)?change?will cause?the?entire?thermal?system?and?heat?the?whole?plant?changes?in?economic indicators.?The?main?elements?of?the?design?for?a?300MW?unit?condensing?steam plant?thermal?system?in?principle?calculation?of?variable?condition,?according?to?a given?thermal?system?and?its?data?to?calculate?the?rated?power,?when?the?removal?of the?high-pressure?heater?system?H2?stem-water?all?parameters,?flow?and?thermal economic?indicators.?By?ordinary?methods?and?equivalent?enthalpy?drop?method?to compare?the?calculation?of?the?two?conditions?of?thermal?economy,?in?order?to provide?the?basis?for?the?operation?and?regulation. Key?words?：Principle Thermal?System Variable?Conditions Conventional?Method II 河北工程大学毕业设计(论文) 目录 第一章? 绪? 论?................................................................................................................................ 1 第二章? 热力系统原则性计算原理?.............................................................................................. 2 1.1? 常规计算法?.............................................................................................................................. 2 1.2? 等效焓降法?.............................................................................................................................. 3 第三章? 机组全厂原则性热力系统计算?...................................................................................... 5 3.1? 热力系统与计算原始资料?..................................................................................................... 5 3.2? 辅助计算?................................................................................................................................. 6 3.3? 高压加热器组抽汽系数计算?.............