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+// Implementation of example 3.6
+// Basic and Applied Thermodynamics by P.K.Nag
+// page 57
+
+clc
+clear
+
+shs=0.9 // (specific heat in solid state in kJ/kg*K)
+lt=390 // (latent heat in kJ/kg)
+wt=27 // (atomic wt of aluminium)
+dn=2400 // (density in kg/m^3)
+Tf=700 // (final temp in degree celsius)
+mp2=660 // (melting point in degree celsius)
+t1=15 // (in degree celsius)
+shl=29.93 // (specific heat in liquid state in kJ/kg*K)
+e=0.7 // (efficiency)
+V=2.18 // (m^3) from example 3.5
+rating=2.17d3 // (rating of furnace as evaluated in example 3.5)
+
+ht=shs*(mp2-t1)+lt+shl*(Tf-mp2)/wt;
+// ht is heat required per kg of aluminium
+hs=(ht/e);
+rate=(rating/hs)*3600; // 3600 is used to convert rate into kg/hour
+rate=(rate/1000) // to convert it into tonnes/hour
+disp("rate at which aluminium can be melted with given power =")
+disp(rate)
+disp("tonnes/hour")
+mass=(V*dn)/1000;
+disp("mass of aluminium that can be held =")
+disp(mass)
+disp("tonnes")