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据《Теплоэнергетика》2010年9月号报道,提高汽轮机(特别是对于核电站)的单机功率要求增加末级排汽的面积,以便在高度真空的情况下保证蒸汽必要的通路并降低余速损失。借助于增加末级叶片高度、排汽口(即低压缸)数、以及在АЭС(核电站)大功率(超过1 000 MW)汽轮机情况下从高速(3 000～3 600 r/min)转变到低速(1 500～1 800 r/min)就能做到这一点。在保持高经济性的前提下,与传统的解决办法比较,应用组合排汽,不用大幅度地增加叶片高度就能使排汽面积增加30%～35%。
According to the “Теплоэнергетика” September 2010 report, increasing the stand-alone power of steam turbines (especially for nuclear power plants) requires an increase in the area of the final stage exhaust to ensure the necessary access to the steam and reduce the residual loss under high vacuum conditions. By transitioning from the high speed (3,000 to 3,600 r / min) to the low speed with the addition of final blade height, the number of exhaust vents (ie low pressure cylinders) and the high power (over 1 000 MW) Turbines at АЭС (1 500 ~ 1 800 r / min) can do this. In the premise of maintaining high economy, compared with the traditional solution, the application of combined exhaust, without a substantial increase in blade height can make the exhaust area increased by 30% to 35%.