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+clc;funcprot(0);//EXAMPLE 17.41
+// Initialisation of Variables
+Cpw=4.18;..............//Specific heat of water in kJ/kgK
+n=1;................//No of cylinders
+N=350;.......//Engine rpm
+pmi=2.74;..........//Mean effective pressure in bar
+bl=600;..........//Brake load in N
+mf=4.22;............//Fuel consumption in kg
+mw=495;..............//Mass of cooling water
+tw1=13;...............//Water inlet temperature in C
+tw2=38;................//Water outlet temperature in C
+ma=135;..................//Mass of air used in kg/h
+tr=20;.................//Room temperature in C
+tg=370;.................//Exhaust temperature in C
+D=0.2;.................//Engine bore in m
+L=0.28;.................//Engine stroke in m
+Db=1;......................//Brake drum diameter in m
+C=44670;...................//Calorirfic value of fuel in kJ/kg
+Cps=2.093;..................//Specific heat of steamm in exhaust in kJ/kgK
+Cpg=1.005;...................//Specific heat of dry exhaust gases in kJ/kgK
+k=1;....................//Two stroke engiine
+t=60;.....................//Duration of testing in min
+perh=15;.................//Percentage of H2 in the fuel
+//Calculations
+IP=(n*pmi*N*D*D*L*k*10*(%pi/4))/6;...................//Indicated power in kW
+disp(IP,"Indicated power in kW:")
+BP=(bl*%pi*Db*N)/(60*1000);......................//Brake power in kW
+etaith=(IP)/((mf/3600)*C);.................//Indicated thermal efficiency
+disp(etaith*100,"Indicated thermal efficiency in %:")
+//Heat supplied
+hf=(mf/t)*C;................//heat supplied by fuel
+hbp=BP*t;...........//Heat equivalent of BP in kJ/min
+hcw=(mw/60)*Cpw*(tw2-tw1);..........//Heat carried away by cooling water
+mg=(mf+ma)/t;....................//Mass of exhaust gases in kg/min
+mst=9*(perh/100)*(mf/60);..................//Mass of steam formed
+mdg=mg-mst;..............................//Mass of dry exhaust gases per min
+hg=(mdg)*Cpg*(tg-tr);..........//Heat carried by exhaust gasses
+hst=mst*(417.5+2257.9+(Cps*(305-99.6)));....................//Heat carried by exhaust steam, the obtained values are from steam table and hence are constants at NTP
+ha=round(hf)-round(hbp+hg+hst+hcw);............//Unaccounted heat
+pf=100;pbp=(hbp/hf)*100;pcw=(hcw/hf)*100;pg=(hg/hf)*100;pa=(ha/hf)*100;pst=(hst/hf)*100;
+printf("\n\n")
+printf("HEAT BALANCE TABLE\n")
+printf("_______________________________________________________________________\n")
+printf("Item                                          kJ               Percent\n")
+printf("_______________________________________________________________________\n")
+printf("Heat supplied by fuel                       %f             %f\n",hf,pf)
+printf("Heat equivalent of BP                       %f             %f\n",hbp,pbp)
+printf("Heat taken away by cooling water            %f             %f\n",hcw,pcw)
+printf("Heat carried away by dry exhaust gases      %f             %f\n",hg,pg)
+printf("Heat carried away by steam in exhaust gases %f             %f\n",hst,pst)
+printf("Unaccounted heat                            %f             %f\n",ha,pa)
+printf("_____________________________________________________________________")