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| author | priyanka | 2015-06-24 15:03:17 +0530 |
|---|---|---|
| committer | priyanka | 2015-06-24 15:03:17 +0530 |
| commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
| tree | ab291cffc65280e58ac82470ba63fbcca7805165 /551/CH12/EX12.17/17.sce | |
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initial commit / add all books
Diffstat (limited to '551/CH12/EX12.17/17.sce')
| -rwxr-xr-x | 551/CH12/EX12.17/17.sce | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/551/CH12/EX12.17/17.sce b/551/CH12/EX12.17/17.sce new file mode 100755 index 000000000..7f5bc583d --- /dev/null +++ b/551/CH12/EX12.17/17.sce @@ -0,0 +1,65 @@ +clc
+h1=3460; //kJ/kg
+h2=3460; //kJ/kg
+h3=3111.5; //kJ/kg
+h4=3585; //kJ/kg
+h5=3207; //kJ/kg
+h6=2466; //kJ/kg
+h7=137.8; //kJ/kg
+h8=962; //kJ/kg
+h9=670.4; //kJ/kg
+h10=962; //kJ/kg
+
+p1=100; //bar
+p2=95; //bar
+p3=25; //bar
+p4=22; //bar
+p5=6; //bar
+p6=0.05; //bar
+
+n_mech=0.9;
+n_gen=0.96;
+n_boiler=0.9;
+
+P=120*10^3; //kW
+
+m1=(h10-h9)/(h3-h8);
+
+m2=(h9-m1*h8-(1-m1)*h7)/(h5-h7);
+
+W_IP=(1-m1-m2)*(p5-p6)*0.001*10^2;
+W_HP=(p1-p5)*0.001*10^2;
+
+W_total=(W_IP+W_HP)/n_mech;
+
+W_indicated=(h2-h3) + (1-m1)*(h4-h5) + (1-m1-m2)*(h5-h6);
+
+Output=(W_indicated - W_total)*n_mech*n_gen; //net electrical output
+
+rate=P*3600/Output;
+
+amt1=m1*rate; //Amounts of bled off, surface(high pressure) heater
+disp("Amounts of bled off, surface(high pressure) heater =")
+disp(amt1)
+disp("kg/h")
+
+amt2=m2*rate; //Amounts of bled off, surface(low pressure) heater
+disp("Amounts of bled off, surface(low pressure) heater")
+disp(amt2)
+disp("kg/h")
+
+
+disp("(iii) Overall thermal efficiency")
+Q_boiler=(h1-h10)/n_boiler;
+Q_reheater=(h4-h3)/n_boiler;
+
+n_overall=Output/(Q_boiler+Q_reheater)*100;
+disp("Overall thermal efficiency =")
+disp(n_overall)
+disp("%")
+
+
+disp("(iv) Specific steam consumption =")
+ssc=rate/P; //Specific steam consumption
+disp(ssc)
+disp("kg/kWh")
\ No newline at end of file |