Here in question it is given the enthalpy of air as ha=320 KJ/kg and the enthalpy of fuel is
hf=43027 kJ/kg the gases leaving at an enthalpy of hm=616 Kj/kg here , for heating air the fuel requirement is so,
Here it is given that hose required heat as 17.02 kW =
Total heat requirement per day by hose will =
Net enthalpy exchange by air to heat the hose = /kg
so, net mass of air consumption per day /day
so net mass of fuel consumption per day = of fuel per day
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