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

作　　者：汤涛[1] 胥建群[1] 韦红旗[1] 

机构地区：[1]东南大学能源热转换及其过程测控教育部重点实验室,南京210000

出　　处：《发电设备》2013年第5期301-306,共6页Power Equipment

摘　　要：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.

关 键 词：火电机组 干湿并联 变工况 空冷凝汽器 湿冷凝汽器 热负荷分配 

分 类 号：TK264.11[动力工程及工程热物理—动力机械及工程]