摘要
在现行汽轮机的工作环境下,水蒸气性质与理想气体性质存有一定的差别,在工程计算中,须采用蒸汽图表和公式。但在进行理论分析研究时,即在公式推导时,仍不得不借助理想气体公式,否则就没有简单的关系式可循。针对蒸汽理论分析中的近似计算方程及公式中一些常数的取值问题进行探讨,指出了蒸汽理论分析中偏差产生的根源,为火电机组蒸汽理论分析的进一步完善提供了指导。
There are certain differences in nature between ideal gas and steam in steam turbine working environment. In engineering terms, the steam tables and formulas are required to adopt. But in theoretical analysis, that is, when the formula derived, the ideal gas formula still used, otherwise there is no simple relationship to follow. In this paper, the causes of the deviation were discussed against the approximate calculation and the value of some constant in steam theoretical analysis, which provided some guidance for coal-fired power units to further improve theoretical analysis of steam.
出处
《电力科学与工程》
2009年第5期35-38,共4页
Electric Power Science and Engineering
关键词
火电机组
蒸汽
压缩系数
过热度
绝热指数
偏差
coal-fired power unit
steam
compression coefficient
degree of superheat
adiabatic index
deviation
