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  • Users: marada93
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  1. marada93

    TURBINE VALVES WIDE OPEN

    Some time ago I had posted concerning the potential benefit to operation our steam turbine with valves wide open. As it turns out, I have had the opportunity to run in this mode, so I need to bounce some numbers back to you guys who pushed me in the right direction before...so heres what I've...
  2. marada93

    Steam Fow Question

    Say you have a 1" steam drain pipe (schedule 80). On the inlet is steam at 200 psig and 500 F. It exhausts to a condenser at approx 25" mercury approximately 60' away. The I.D. is .96" (I think). Can someone determine from this what the flow through the pipe is? Or is there a need for more...
  3. marada93

    Synching Feeling

    What is it that hold a generator in synch with the rest of the grid. My way of thinking, the magnetic field produced by the generator must be of opposite polarity as the magnetic field of the grid...so they attract each other. Is that close...? Or should I go ahead and take that fuel handler...
  4. marada93

    Hot Restart

    In the event of a boiler trip (MFT), under certain conditions, the boiler fan train will trip as well via interlock (extreme negative furnace draft, for instance). My question is this... Is there a requirement (code?) that prevents attempting restart on a fan (900 HP) unit it coasts down to...
  5. marada93

    Air In Leakage

    I noticed that while condenser vacuum is normal, my air in leakage detector is indicating 12-15 SCFM of in-leakage. This is roughly three times higher than normal. All the routine checks for the source have turned up negative. What I'd like to know is, whats the best way to look for air...
  6. marada93

    WATTS the DEAL ?

    I've got a question about watt production from an AC generator. I'm new here...so bear with me. I understand allright about if I change excitation current I get a corresponding change in output voltage (and reactive power). I understand that an increase or decrease of the prime mover will...
  7. marada93

    Unity

    Say you have an AC generator connected to the grid with a PF controller set to produce 10 MVAr out. If you then set the PF controller to produce unity, do you realize an increase in unit efficiency. Reduced fuel consumption perhaps? Any documentation out there to prove it one way or another?
  8. marada93

    Turbine Control Valves

    I'm seeking information on operation of turbine control valves wide open. Currently we have sequential valve opening, yet at full load we end up with two valves atapprox 50% open, and a third at 15-20%. This equates to a 300 psig throttle pressure loss across the valves. My feeling is that the...

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