摘要
通过对34台空冷机组的分析计算,获得空冷机组实际运行特点,深入调研后发现调研机组的空冷岛(塔)性能合格率为76.47%,冷端性能合格率为17.64%。空冷系统的传热恶化主要出现在主机端,主要原因是低压缸热负荷较设计值偏大。80%空冷机组须投入辅助冷却系统才能保证夏季设计满发温度下具备带满负荷的能力,空冷系统温度场和蒸汽分配均与设计存在一定偏差。
Operating characteristics of 34 air-cooling units were obtained through calculation and analysis.Deep research results show that the qualified rate of the air-cooling island/tower and the cold-end system is 76.47%and 17.64%,respectively.Heat-transfer deterioration mainly happens on the turbine side of the air-cooling system,due to the actual heat load being higher than the design value of the low-pressure cylinder.To ensure that the units can run normally under full load at design temperatures in summer,80%of the units need to run their auxiliary cooling systems.Both the temperature field and the steam distribution of relevant air-cooling systems deviate from their design values in a certain degree.
作者
徐松泉
杨博
文珏
魏江
杨文飞
薛康康
Xu Songquan;Yang Bo;Wen Jue;Wei Jiang;Yang Wenfei;Xue Kangkang(Jingtai Power Plant, Datang Gansu Power Generation Co., Ltd., Jingtai 730400,Gansu Province, China;Northwest Branch, China Datang Corporation Scienceand Technology Research Institute Co., Ltd., Xi’an 710016, China)
出处
《发电设备》
2020年第2期144-148,共5页
Power Equipment
关键词
空冷机组
限负荷运行
冷端性能
air-cooling unit
limited load operation
cold-end performance
