等效焓降局部定量修正模型的算法研究  

Arithmetic Research of Local Quantitative Modificatory Model on Equivalent Enthalpy Drop

作　　者：江峰[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：《汽轮机技术》2008年第2期122-125,共4页Turbine Technology

基　　金：国家自然科学基金项目(50376011);高等学校博士学科点专项科研基金(20060286033)

摘　　要：等效焓降的局部定量分析需要使用抽汽效率等基础参量,而这些基础参数会受到局部变化的影响。传统的算法模型对这种影响考虑较少且无规律,不同程度上影响了等效焓降分析方法的使用效果。为了全面分析抽汽放热、疏水放热和给水吸热量变化对传统局部定量算法的影响,研究了抽汽压损变化(两种情形)的局部定量模型,分别比较了抽汽焓、出水焓和疏水焓变化对局部定量分析模型的影响,并提出了修正算法。热平衡方法的验证结果表明,修正模型计算结果准确。Basic parameters such as exhaust efficiency are needed in local quantitative analysis of equivalent enthalpy drop, which would be influenced by local change. With less consideration of this ruthless influence, traditional arithmetic model affected using effect of equivalent enthalpy drop method in different degree. In order to analyze influence on traditional local quantitative arithmetic by changes of steam extraction heat release quantity, drain water heat release quantity and feed water decalescence, this paper studied local quantitative model of extraction pressure change （two conditions）, compared different influence on local quantitative model by enthalpy changes of extraction steam, out flowing feed, and drainage, and ad- vanced amendatory arithmetic. Validated result of thermal balance method showed the correctness of amendatory model.

关 键 词：等效焓降局部算法 端差变化 疏水变化 抽汽焓值变化 

分 类 号：TM621.4[电气工程—电力系统及自动化]