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The largest single loss in a typical industrial boiler is usually

  • A.the dry flue gas loss
  • B.the radiation loss from the shell
  • C.the loss due to unburnt carbon in the ash
  • D.the loss due to moisture in the combustion air

Answer: A

Hot gas leaving the stack commonly carries six to twelve per cent of the input, and it is the loss most amenable to improvement through excess air control and better heat transfer. Radiation and air moisture are usually under two per cent between them.

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