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应用间接空冷系统的汽轮机的排汽温度及压力主要取决于其运行时的大气干球温度、空气冷却器以及水冷凝汽器的工作情况。通过算例对分别由不同的设计背压的汽轮机组成的两个空冷系统进行了计算与分析 ,结果表明 ,空冷电厂汽轮机排汽温度应能适应较大变化的情况 ;特别是夏季 ,排汽温度接近 72℃ ;空冷汽轮机的设计背压可能高于湿冷的 (应通过总体优化确定 ) ,反动式汽轮机应为首选的型式。
The exhaust temperature and pressure of steam turbines using indirect air cooling systems depend mainly on the atmospheric dry-bulb temperature during operation, the operation of air coolers and water-cooled condensers. The calculation and analysis of two air cooling systems with different design back pressure steam turbines are carried out by the example. The results show that the temperature of the exhaust steam of the turbine of air cooling power plant should be able to adapt to the large changes. Especially in summer, the exhaust temperature Close to 72 ° C; the design backpressure of air-cooled turbines may be higher than that of wet-cold (which should be determined by overall optimization) and the reaction turbine should be the preferred type.