Steam Boilers, Engines, Nozzles and Turbines
The temperature of flue gases at air heater outlet should be

Below dew point temperature of flue gases
100°C
Less than wet bulb temperature of flue gases
Above dew point temperature of flue gases

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Steam Boilers, Engines, Nozzles and Turbines
Equivalent evaporation of water is the evaporation for a feed water supply at 100°C

Conversion into steam at the same pressure at which feed water is supplied
And its corresponding conversion into dry steam at desired boiler pressure
Conversion into steam at atmospheric condition
And its corresponding conversion into dry saturated steam at 100°C and 1.033 kg/cm²

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