A boiler furnace releases 11 000 kJ of heat for each kg of fuel burned and produces dry saturated steam at 12 000 kPa from feedwater at 220°C. How many kg of steam will be produced for each kg of fuel burned if the boiler had an efficiency of 77%?. heat generated by burning 1 kg of fuel , q1=11000 kj/kg heat used to boil water by burning 1kg of fuel ; q2=q1x difference fraction=11000x0.77=8470 kj from steam tables: enthalpy of saturated steam @ 12000 kpa , h1=2684.9 kj/kg enthalpy of water @ 220 degrees celcius=943.62
Why am I not getting this right , am I doing a calculation wrong for the final answer
(m=q2 x h1-h2=8470 x 2684.9-943.62=22740159.38 ) ?
A boiler furnace releases 11 000 kJ of heat for each kg of fuel burned and produces dry saturated steam at 12 000 kPa from feedwater at 220°C. How many kg of steam will be produced for each kg of fuel burned if the boiler had an efficiency of 77%?.
heat generated by burning 1 kg of fuel , q1=11000 kj/kg
heat used to boil water by burning 1kg of fuel ; q2=q1x difference fraction=11000x0.77=8470 kj
from steam tables:
enthalpy of saturated steam @ 12000 kpa , h1=2684.9 kj/kg
enthalpy of water @ 220 degrees celcius=943.62
mass of steam produced by burning 1 kg of fuel ; m=q2 x h1-h2=8470 x 2684.9-943.62=22740159.38
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