干湿并联冷却机组变工况特性研究

Study on Characteristics of a Dry/Wet Hybrid Cooling System under Variable Working Conditions

针对干湿并联冷却系统变工况的计算,提出了干湿并联冷却系统机组排汽压力变工况计算的数学模型。以300MW干湿并联冷却机组为例,得出了环境干球温度、环境湿度、空冷岛迎面风速和机组排汽量对机组排汽压力的影响规律,分析了干湿并联冷却机组冷端的变工况特性,从而为提高干湿并联冷却机组的安全性、经济性和性能提供了理论依据。

A mathematical model was set up for calculating the exhaust steam pressure of a dry/wet hybrid cooling system under variable working conditions. Taking a 300 MW dry/wet hybrid cooling system as an example, the influence of following factors on the exhaust steam pressure was analyzed, such as the dry-bulb temperature, the ambient humidity, the face velocity in air cooling island and the exhaust volume of unit, etc., while the characteristics of its cold end studied, whic~ may serve as a theoretical basis for improving the safety, economical efficiency and performance of the dry/wet hybrid cooling system.