What is Boiler Specifications ?

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Boilers are specified by four parameter as listed:-

  1. Steam flow rate or evaporation
  2. Steam outlet pressure
  3. Steam outlet temperature
  4. Feed water inlet temperature

Steam Flow or Evaporation or Boiler Output:-

This is the amount of steam generated from the FW supplied at a certain temperature.
It is the capacity or the rating of the boiler expressed in ton per hours.
Boiler ratings are better designated by the heat duty than evaporation.

Super heater outlet pressure:-

It is the pressure at which steam is available for further consumption.

Usually it is approximate 5% higher than process or turbine inlet pressure to account for the piping loss.

In fixed-pressure boilers, this pressure is held constant as the turbine inlet valves vary the steam pressure to the inlet nozzles.

SH Outlet Temperature:-

Super heater outlet temperature is the temperature at which the steam leaves the super heaters.

It is the highest temperature gain by the steam in a boiler.

RH steam is sometimes slightly higher than the superheat steam in utility boilers.

Feed Water Temperature:-

Feed water temperature varies from as low as 85°C for very low-capacity boilers and as high as 270°C in very high-pressure  power plants with several stages of feed heating.

Feed water temperature 270°C attained with the help of feed heating system.





Comments

  1. SureshkumarMarch 26, 2021 at 1:23 PM

    The article gives a detailed view on Boiler specifications. For more information on power turbine systems check out this website Nconturbines.com.

    ReplyDelete

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