Please can the attached question be answered showing working and on a word type document please. Thanks for looking at my question.
A smelting furnace is fuelled with propane gas to melt Aluminium ingots (shown below) for wheel manufacturing. The furnace is loaded up with 50 aluminium ingots each of mass 20 kg.
Calculate the energy that must be supplied by the furnace to melt the ingots completely. Before being placed in the furnace the ingots are stored at 15°C.
(b) If 25 kg of propane is used to complete the melting process calculate the efficiency of the furnace’s heat transfer process.
(c) A standard aluminium ingot is 800 mm in length at 15°C. When the ingots reach a temperature of 500°C. Calculate:
(i) the increase in length due to the thermal expansion of an ingot assuming the ingot is free to expand
(ii) the induced force in an ingot assuming it has become jammed in the furnace and is NOT free to expand
Melting point of aluminium 660°C
Specific heat capacity for aluminium (cp): 0.91 kJ/kgK
Latent heat of melting for aluminium (L): 321 kJ/kg
Modulus of elasticity for aluminium: 69 GPa
Coefficient of linear expansion for aluminium: 22.2 x 10-6 /°C
Calorific value for propane 49.93 MJ/kg
Ingot cross sectional area 0.019 m2
