Answer to Question #105558 in Mechanical Engineering for abbas

Question #105558
Air and fuel enter a furnace used for home heating. The air has an enthalpy of 320 kJ/kg and the fuel has an enthalpy of 43027 kJ/kg. The gases leaving the furnace has an enthalpy of 616 kJ/kg. There are 17 kgair/kgfuel, water circulated through the wall furnace receiving heat. The hose required 17.02 kW of heat, what is the fuel consumption per day. (41 kg/day)
Expert's answer

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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