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clc;
clear;
//Example 5.4
mc_dot=1000 //[kg/h]
mc_dot=mc_dot/3600 //[kg/s]
mh_dot=250 //[kg/h]
mh_dot=mh_dot/3600 //[kg/s]
Cpc=4187 //[J/(kg.K)]
Cph=3350 //[W/K]
w=mc_dot*Cpc //[W/K]
l=mh_dot*Cph //[W/K]
C=mh_dot*Cph/(mc_dot*Cpc)
U=1160 //[W/sq m.K]
A=0.25 //Heat transfer surface for exchanger in [sq m]
ntu=U*A/(mh_dot*Cph) //
E=(1-%e^(-ntu*(1+C)))/(1+C) //Effectiveness of heat exchanger
T1=393 //Inlet temperature in [K]
t1=283 //Cooling water [K]
T2=T1-E*(T1-t1) //Outlet T of hot liquid
t2=C*(T1-T2)+t1 //[K]
printf("\n\nEffectiveness of heat exchanger is %f\n",E);
printf("\nOutlet temperature of hot liquid is %f\n",T2);
printf("\nOutlet temperature of water is %f\n",t2)
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