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Why multiple turbines drive a single generator

  1. Jan 3, 2017 #1
    A common sense questions. Can anyone care to provide their insights?
     
  2. jcsd
  3. Jan 3, 2017 #2

    davenn

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    really ??
    haven't seen that before, do you have an example ?
     
  4. Jan 4, 2017 #3
    In my opinion, it is an usual system: what we call “ a steam turbine” are 3 turbines acting on the same shaft: high pressure, intermediate and low pressure. A gas turbine could be two in series-in combined cycle power plant.
     
  5. Jan 4, 2017 #4
    Can it be because having a single generator is less costly and would be more efficient as multiple generators would lead to some type of internal losses due to resistance or friction....
     
  6. Jan 4, 2017 #5

    anorlunda

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    Those multiple turbines are probably connected to the same shaft. Even though they have several sections, we call them collectively "a turbine"

    Sometimes we have cross compound turbines with multiple shafts and multiple generators but one steam path. That's rare today.
     
    Last edited: Jan 5, 2017
  7. Jan 5, 2017 #6
    What type of turbine? Steam, gas, ? Is this a Co-gen with Heat Recovery Steam Gen?
     
  8. Jan 5, 2017 #7

    jim hardy

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    Are you speaking of central power station equipment?
    Common sense ? Look up KISS principle. One turbogenerator with multistage turbine of course .

    turbogenerator.jpg

    all on one shaft...
     
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