背压变化对机组煤耗影响的定量计算方法比较研究_薛云灿.pdfVIP

·电气与自动化· 薛云灿，等·背压变化对机组煤耗影响的定量计算方法比较研究 背压变化对机组煤耗影响的定量计算方法比较研究 1 1 2 2 薛云灿 ，沙伟 ，刘瑞阳 ，于连海 (1． 河海大学物联网工程学院，江苏常州213022 ;2． 山东电力工程咨询院有限公司，山东济南250013) 摘 要:由于受诸多因素的影响，火电机组的汽轮机机组背压经常发生变化，确定背压变化对 机组煤耗的影响对机组运行和节能分析都具有重要意义。基于此，对偏微分法和等效焓降法2 种计算模型进行了详细分析和比较，指出每种方法的优缺点和适用条件;并以N300 － 16． 65 / 537 / 537 －I 型汽轮机运行数据为例，对模型进行验证。通过实例计算，认为第1 种方法所需实 验数据少，适用于计算机编程，通用性强;第2 种方法较为便捷、准确，并具有广泛的适用性。2 种方法都能满足工程计算需要。 关键词:火电机组;凝汽式汽轮机;背压;热经济性 中图分类号:TM311 文献标志码:A 文章编号:167 1-5276 (2015)06-0182-03 Comparative Study of Quantitative Calculation Methods of Influence of Backpressure Change on Coal Consumption of Unit XUE Yuncan1 ，SHA Wei1 ，LIU Ｒuiyang2 ，YU Lianhai2 (1． College of IOT Engineering ，Hohai University ，Changzhou 213022 ，China ; 2 ． Shandong Electric Power Engineering Consulting Company ，LTD． ，Jinan 250013 ，China) Abstract : Due to many factors ，steam turbine exhaust pressure often changes． To determine the effect of the back pressure on the coal consumption of the unit is of great significance for unit smooth operation and energy saving analysis． Based on this ，the two cal- culation models :the equivalent enthalpy drop method and partial differential method are analyzed and compared in detail and the ad- vantages ，disadvantages and conditions of each one are pointed out ． The operating data of N300 － 16 ． 65 / 537 / 537 － I unit is taken for example to verify the model． it shows that the first method only needs a few experimental data ，it is suitable for the computer pro- gramming and has ，strong versatility ;while the second one is of convenience ，accuracy ，and wide applicability ． Both meet the needs of the engin