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doi:10.3969/j. issn. 1009 3230. 2012. 04. 005
应用能源技术
2012年第4期(总第172期)
超临界机组热力系统变工况下经济性分析
樊立云",张培杰”,房林铁”,张红方”
(1.北京京能新能源有限公司,北京100028;
2.华北电力大学电站设备状态监测与控制教育部重点实验室,保定071003)
摘要:研究和分析加热器经济性指标与运行工况的关系、更好地掌握加热器系统特征、提高系统的运行水平是提高机组经济性和安全性的关键。运用基于热力学第一定律的等效冷降法和基于热力学第二定律的拥分析法对加热器系统特征进行分析研究。等效恰降理论热力系统热经济性计算的通用矩阵方程能有效充股热经济性矩阵分析方法需要联立其它方程才能求解热力系统最终热经济性指标的缺陷。焊分析法为评价能量转换的“量"和“质”提供了统一的尺度。综合考虑上述方法,分析加热器系统特征,为准确评价热力系统的热经济性提供依据。
关键词:热经济性;等效恰降法;娟分析法;热力系统
中图分类号:TK212
文献标志码:A
文章编号:10093230(2012)04-001806
TheEconomic Anslysisof Supercritical Units in
Different Conditions
FAN Li-yun', ZHANG Pei-jie’, FANG Lin-tie', ZHANG Hong-fang(1. Beijing Jingneng New Energy Co. ,Ltd, Beijing 100028, China;
2.MOE's Key Lab of Condition Monitoring and Control of Power Plant Equipment,
NorthChina Electric PowerUniversity,HebeiBaoding 071003,China)
Abstract: Research and analysis the relationship between economic indicators and the heater opcrating conditions ,to better grasp the characteristics of the heater system and improve the operation of the system level is the critical to improve the units economy and security. The characteristics of the hcater system were analysed using the equivalent enthalpy drop method based on the first law of thermodynamics and the exergy analysis method based on the second law of thermodynamics. The calculation of heat cconomy of the general matrix equation based on an equivalent enthalpy drop theory, can overcome defects which the heat economy matrix method requires the other cquations to
solve the final heat economic indicator scale of the “"quantity" and "quality
s of the thermal system. Exergy analysis provided a unified evaluatetheenergyconversion.Considenngtheabove
methods, to analyze characteristics of the heater system provide the basis for thermal economy to the accurate evaluation of thermal systems
Key words: Heat economic; Equivalent enthalpy drop method; Exergy analysis method; Thermal system
0
引言
目前火力发电厂高度重视节能降耗工作,回
热系统参数偏离设计值所引起的系统效率下降是
收稿日期:2012-03-15
修订日期:2012-0325
作者简介:樊立云(1975-),男,北京京能新能源有限公司
副总经理,主要从事新能源产业管理工作。
万方数据
节能分析工作研究的重点")。等效焰降法是一种灵活的热力系统计算方法,可以实现热力系统整体计算、局部定量计算、局部定量分析和经济性诊断。可有效的诊断出电厂运行中设备的能量损耗、指出节能改造的途径与措施、评定机组的完善程度和挖掘节能潜力等,从而为技术改造提供确