When do the dangerous operating conditions occur in the control stage of a condensing steam turbine with nozzle regulation?
Thread Content
When does the critical operating condition occur in the control stage of a condensing turbine with nozzle regulation? Answer: The enthalpy drop in the control stage of such a turbine reaches its maximum value when the first control steam valve is fully open and the second control steam valve is closed; at this point, the steam flow rate through the first set of nozzles is at its maximum. Due to the impact force of steam on the moving blades, the product of the steam flow rate and the enthalpy drop is proportional, and the stress on the moving blades of the control stage is at its maximum at this time. This is the critical operating condition for the control stage of a condensing steam turbine with nozzle regulation.
If the nozzle is not adjusted properly, it can also reduce pressure and cause injury; our company has experienced such accidents