What is the distributed steam inlet method for turbines?
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I would like to ask fellow sailors: In Siemens’ turbine specifications, it is mentioned that \"a distributed steam supply method is used, which ensures even steam distribution and can reduce the warming-up time by 50%.\" What exactly is this distributed method? Why can the warm-up time be reduced?
First, it is necessary to understand why warming up is required: The inlet valves of the speed control valve in Siemens turbines are located at the top of the turbine, and there are four such inlet valves. As the turbine starts to accelerate, these four valves open one by one. When only the valve at the top is open, steam causes the temperature of the upper cylinder of the turbine to be higher than that of the lower cylinder. This results in a difference in the expansion rate between the upper and lower cylinders, leading to deformation. Therefore, warming up is needed to ensure that the temperatures of the upper and lower cylinders rise evenly. Distributed intake means that the four valve spools of the throttle valve allow air to enter from either the upper cylinder or the lower cylinder. In this way, the air intake distribution doesn’t need to warm up for too long.
Oh oh! I understand now; it was explained very clearly. Thank you, senior!