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热电站设计时往往以其所在热网的供热量为准,从初投资出发对热电联供汽轮机提出中压和低压抽汽量的要求。如果热电联供汽轮机以这些抽汽量作为设计依据,则必然导致热电联供汽轮机长年运行中热效益的降低,其原因是这些抽汽量不是汽轮机内效率所要求的最好通流部分,也不是最佳的抽汽点(过热度)。作为大批量生产的定型热电联供汽轮机,将会造成其后的其他热电站的损失。所以在热电联供汽轮机的初步设计中必
Thermal power station design is often based on its heat network heating prevail, starting from the initial investment on the steam turbine for medium and low voltage steam extraction requirements. If these combined steam turbines are to be designed on the basis of these extraction volumes, this will inevitably lead to a reduction in the thermal benefits of the combined-steam turbine for many years of operation due to the fact that these extraction volumes are not the best through-flow required by the turbine efficiency, Is not the best extraction point (superheat). As a high-volume stereotyped cogeneration turbine, it will result in the loss of other thermal power plants. Therefore, in the preliminary design of combined heat and power turbine must be