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0drt9
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Homework Statement
A boiler is to produce 6250 kg/h of steam superheated by 40 oC at a pressure of 2.1 MN/m2. The temperature of the feedwater is 50 oC. If the thermal efficiency of the boiler is 70%, how much fuel oil will be consumed in one hour? The calorific value of the fuel oil used is 45000 kJ/kg, cp of superheated steam is 2.093 kJ/kg K.
for pressure 2.1 Mn/m2
hfg = 1880 kJ/kg
hf = 920 kj/KG
sat temp - 214.9
Homework Equations
in my notes i have efficiency as [generated steam * hfg] / [fuel consumed * CV ]
The Attempt at a Solution
my attempt gave me the answer of 373 which i found to be to small of a value