摘要
直接空冷机组运行时间越长，其散热器管内、外污垢热阻对机组的热经济性影响越加明显，以某600MW直接空冷机组为例，限定散热器管内、外污垢热阻变化范围为0～0．001（m^2·K）／W，建立机组排汽压力的管内、外污垢热阻特性数学模型，编程计算做出对应特性曲线，并进一步分析了机组热负荷一定时，管内、外污垢热阻对排汽压力影响的迎面风速特性及环境温度特性，对于空冷机组的经济运行具有一定的参考价值。
The longer the direct air-cooled unit having been in operation, the more obvious the influence of radiator dirt thermal resistance on unit heat economy becomes. Some 600MW direct air-cooled unit had been taken as the example in the paper, supposing that both dirt thermal resistance in and out of the radiator varied in the range of 0 - 0. 001 （m^2 · K）/W, an mathematical model which was about the dirt thermal resistance characteristic of direct air-cooled unit was formed. Then corresponding curve was drawn out by programming. In case that the unit heat load kept constant, What was analyzed moreover was that how dirt thermal resistance effect exhaust pressure on the condition of different approach wind velocity and ambient temperature. This has great value in guiding economy operation of air-cooled units.
出处
《汽轮机技术》
北大核心
2008年第5期391-394,共4页
Turbine Technology
关键词
直接空冷
污垢热阻
变工况
特性曲线
direct air - cooled
dirt thermal resistance
variable condition
characteristic curve
