| 基于分析法抽汽压损对机组经济性的影响 |
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| 引用本文： | 王富兴,忻炜,房林铁.基于分析法抽汽压损对机组经济性的影响[J].华北电力大学学报,2011,38(6). |
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| 作者姓名： | 王富兴 忻炜 房林铁 |
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| 作者单位： | 1. 中石化天津分公司动力部,天津,300270
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,河北保定,071003 |
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| 摘 要： | 抽汽压损是一种不明显的热力损失,使蒸汽的作功能力下降、热经济性降低。首先定性分析抽汽压损对机组经济性的影响,根据的物理意义定义锅炉效率、机组效率、发电耗率的数学表达式;由小扰动理论和微分理论,建立抽汽压损变化对抽汽量影响的微分关系式,以及锅炉效率、机组效率、发电耗率变化与抽汽量变化的微分关系式。结合N1000-25/600/600机组,定量分析抽汽压损变化对锅炉效率、机组效率、发电耗率的影响。
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| 关 键 词： | 微分关系式 抽汽压损 经济性 效率 |
Influence of extraction steam pressure loss on unit economy based on exergy analysis |
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| WANG FV-Xing
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XIN Wei
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FANG Lin-tie.Influence of extraction steam pressure loss on unit economy based on exergy analysis[J].Journal of North China Electric Power University,2011,38(6). |
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| Authors: | WANG FV-Xing XIN Wei FANG Lin-tie |
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| Abstract: | Extraction steam pressure loss is a subtle thermal power loss,but it will lead to decrease in working capacity of steam and thermal economy of a power plant.Firstly,it makes qualitative analysis on the influence of extraction steam pressure loss upon unit economy,and mathematical formulae for the boiler exergy efficiency,the unit exergy efficiency,and exergy consumption rate were defined.On the basis of the small perturbation theory and differential theory,this paper established differential relationship between extraction steam pressure loss and extraction flow,as well as differential relationship between the change of extraction flow and the change of the boiler exergy efficiency,the unit exergy efficiency,and exergy consumption rate.And finally,this paper analyzed the quantitative on the influence of extraction steam pressure loss upon the boiler exergy efficiency,the unit exergy efficiency,exergy consumption rate on N1000-25/600/600 unit. |
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| Keywords: | differential relationship equation economy extraction steam pressure loss exergy efficiency |
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