The outlet pressure of a back-pressure steam turbine is equal to or slightly higher than the pipeline network pressure. What other effects does this have beyond affecting the thermal efficiency of the steam?
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The outlet pressure of a back-pressure steam turbine is equal to or slightly higher than the pipeline network pressure. What other effects does this have beyond affecting the thermal efficiency of the steam?
Will it affect the seal? For example, shaft end sealing
If the difference between the outlet pressure and the pipeline network pressure is not significant, it has no impact; of course, it’s theoretically possible. If inter-stage sealing is used, this factor can be ignored.
For example, if the actual outlet pressure is higher than the designed value, the temperature of the steam being discharged will also be higher than the specified value. Could this lead to an increase in the temperature of the bearing shells and the lubricating oil?
After passing through the nozzle, the steam experiences a decrease in pressure and temperature, its volume increases and its flow velocity speeds up, with thermal energy being converted into kinetic energy.