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on steam seal calculation (steam turbine)

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junho.ahn@gmail.com Guest	Posted: Fri Jun 08, 2007 11:03 am    Post subject: on steam seal calculation (steam turbine) When I calculate self sealing load point on 500MW steam turbine, I couldn't assume inlet of N2 packing pressure & enthalpy. At this time, I assumed the pressure as HP bowl pressure and the enthalpy as average value between HP bowl enthalpy and HP 1st stage shell one. but I couldn't believe this assumption because there is no steam balance hole on HP 1st Nozzle. If there is steam balance hole on HP 1st Nozzle, I think my assumption is reasonable. I couldn't derived a reasonable value for inlet of N2 packing without balance hole. How can I get the reasonable value for self sealing load point calculation?
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