凝汽器端差的计算和实际工程中的应用分析
Abstract:The main factors affecfing the heat transfer end difference of a condenser were analyzed as well as the relations among them.Some related expressions and concepts which are difficult to understand were explaind.Calculations were conducted using relevant parameters of units with different capacity to further prove the correctness of fhe analyzing method and the result using actual engineering data.The result is not only suitable for analyzing the heat transfer end difference of the condenser,but also suitable to other heat exchangers.It put forward some reasons for high end difference of stram condenser and corresponding measures according to the practical conditions in Wanneng Tongling Power.In addition,it gave a detailed analysis about the effects of these measures and economic efficiency resulting from it.
Key words:condenser;heat transfer end difference;calculation;analysis;corresponding measure
在火力发电厂中,凝汽器的作用之一是在汽轮机排汽口形成一定的真空,使机组排汽尽可能的膨胀做功,减少冷源损失[1]。因此凝汽器工作情况是设计和运行都需要考虑的问题。凝汽器真空度对机组运行安全性和热经济性有很大影响。真空下降使汽轮机排汽缸温度升高,引起汽机轴承中心偏移,严重时还引起汽轮机机组振动。特别是在夏天真空成为机组稳发,满发的最大制约因素,也造成日常维护工作量增
凝汽器端差的计算和实际工程中的应用分析
Abstract:The main factors affecfing the heat transfer end difference of a condenser were analyzed as well as the relations among them.Some related expressions and concepts which are difficult to understand were explaind.Calculations were conducted using relevant parameters of units with different capacity to further prove the correctness of fhe analyzing method and the result using actual engineering data.The result is not only suitable for analyzing the heat transfer end difference of the condenser,but also suitable to other heat exchangers.It put forward some reasons for high end difference of stram condenser and corresponding measures according to the practical conditions in Wanneng Tongling Power.In addition,it gave a detailed analysis about the effects of these measures and economic efficiency resulting from it.
Key words:condenser;heat transfer end difference;calculation;analysis;corresponding measure
在火力发电厂中,凝汽器的作用之一是在汽轮机排汽口形成一定的真空,使机组排汽尽可能的膨胀做功,减少冷源损失[1]。因此凝汽器工作情况是设计和运行都需要考虑的问题。凝汽器真空度对机组运行安全性和热经济性有很大影响。真空下降使汽轮机排汽缸温度升高,引起汽机轴承中心偏移,严重时还引起汽轮机机组振动。特别是在夏天真空成为机组稳发,满发的最大制约因素,也造成日常维护工作量增