汽轮机真空系统严密性试验的静态模拟计算

Static Simulation Calculation of the Air Tightness Test of a Steam Turbine Vacuum System

通过对汽轮机真空系统严密性试验的模拟计算 ,指出真空下降速度并不是漏入凝汽器空气量的单值函数 ,汽轮机负荷、冷却水流量、冷却水入口温度以及凝汽器管材等对真空下降速度均有不同程度的影响 ,并详细分析了这些参数对真空下降速度的影响 。

Through a simulation calculation of the air-tightness test of a steam turbine vacuum system it is concluded that the vacuum decrease rate is not a single-valued function of the air leakage into the condenser. The vacuum decrease rate can be affected more or less by a multitude of factors. Among these one may list: steam turbine load, cooling water flow rate, inlet temperature of cooling water and condenser tube material, etc. A detailed analysis is peformed of the effect of the above factors on the vacuum decrease rate. The conclusions reached can be of some reference value for a more accurate evaluation of the steam turbine vacuum system.