# Steam Desuperheating Calculation

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## Solved Examples

Superheated Steam at 10 Bar A Pressure & 300 oC Temperature is to be desuperheated to temperature of 190oC using Boiler Feed Water available at 15 Bar A and 150oC. Estimate the amount of water and superheated steam required to produce desuperheated steam at rate of 10000 Kg/hr.

• Select Calculation Tab.
• Input required data as stated above in Yellow Highlighted Cells
• Calculator will provide following result

Result
Steam 8973.95 Kg/hr
Boiler Feed Water 1026.05 Kg/hr

Superheated Steam at 150 PSIG Pressure & 450oF Temperature is to be desuperheated to 15oF above its saturation temperature using boiler feed water available at 150 psig & 250oF. Desuperheated steam to be produced at the rate of 5000 lb/hr.

• Visit Steam Tables IAPWS IF-97
• Select Properties at Pressure and calculate steam properties at 150 psig
• Saturation temperature of Steam at 150 psig is 365.872oF
• Steam is to be desuperheated to 365.87 + 15 = 380.87oF
• Change the Units in Desuperheating Calculation and input above values in yellow highlighted cells

Result
Steam 4804.55 Lb/hr
Boiler Feed Water 195.45 Lb/hr