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clc
p1=60; //bar
t1=450; //0C
p2=3; //bar
p3=0.07; //bar; p3=(760-707.5)/760*1.013
n_turbine=0.87;
n_boiler=0.86;
n_alt=0.94;
n_mech=0.97;
P=22500; //kW
h1=3300; //kJ/kg
h2=2607; //kJ/kg
h2a=h1-n_turbine*(h1-h2);
h3=2165; //kJ/kg
h3a=h2a-n_turbine*(h2a-h3);
h_f4=163.4; //kJ/kg
h_f5=561.4; //kJ/kg
disp("(i) The steam bled per kg of steam supplied to the turbine")
m=(h_f5-h_f4)/(h2a-h_f4);
disp("m=")
disp(m)
disp("kJ/kg")
disp("(ii) Steam generated per hour")
W=(h1-h2a) + (1-m)*(h2a-h3a); //Work developed per kg of steam in the turbine
W_act=P/n_alt/n_mech; //actual work
steam=W_act/W*3600/1000; //tonnes/h
disp("Steam generated=")
disp(steam)
disp("tonnes/h")
disp("(iii) The overall efficiency of the plant")
P_avail=P*(1-0.09); //Net power available deducting pump power
Q=steam*1000*(h1-h_f5)/n_boiler/3600; //kW
n_overall=P_avail/Q
disp("n_overall=")
disp(n_overall)
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