Boiler Operation Engineer Interview Question - 19
Q. Why do high pressure Boilers have higher efficiency & lower fuel consumption?Ans.
Because:
1-High pressure boilers have higher saturation temperature.
2-High pressure boilers have higher feed water temperature at economiser inlet.
3-High pressure boiler have lower enthalpy of evaporation (latent heat) will be less.
H = Hf+Hfg + Cps x (Tsup-Tsat)
Where,
Hf = Enthalpy of liquid at operating pressure
Hfg = Latent heat
Tsup = Super heated steam temperature
Tsat = Saturated temperature of steam
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