1 files changed, 32 insertions, 0 deletions
diff --git a/2873/CH9/EX9.4/Ex9_4.sce b/2873/CH9/EX9.4/Ex9_4.sce
new file mode 100755
index 000000000..c83013821
--- /dev/null
+++ b/2873/CH9/EX9.4/Ex9_4.sce
@@ -0,0 +1,32 @@
+// Display mode
+mode(0);
+// Display warning for floating point exception
+ieee(1);
+clear;
+clc;
+disp("Engineering Thermodynamics by Onkar Singh Chapter 9 Example 4")
+T3=1200;//maximum temperature in K
+T1=300;//minimum temperature in K
+y=1.4;//expansion constant
+Cp=1.005;//specific heat at constant pressure in KJ/kg K
+disp("optimum pressure ratio for maximum work output,")
+disp("rp=(T_max/T_min)^((y)/(2*(y-1)))")
+T_max=T3;
+T_min=T1;
+rp=(T_max/T_min)^((y)/(2*(y-1)))
+disp("so p2/p1=11.3,For process 1-2, T2/T1=(p2/p1)^(y/(y-1))")
+disp("so T2=T1*(p2/p1)^((y-1)/y)in K")
+T2=T1*(rp)^((y-1)/y)
+disp("For process 3-4,")
+disp("T3/T4=(p3/p4)^((y-1)/y)=(p2/p1)^((y-1)/y)")
+disp("so T4=T3/(rp)^((y-1)/y)in K")
+T4=T3/(rp)^((y-1)/y)
+disp("heat supplied,Q23=Cp*(T3-T2)in KJ/kg")
+Q23=Cp*(T3-T2)
+disp("compressor work,Wc=Cp*(T2-T1)in KJ/kg")
+Wc=Cp*(T2-T1)
+disp("turbine work,Wt=Cp*(T3-T4)in KJ/kg")
+Wt=Cp*(T3-T4)
+disp("thermal efficiency=net work/heat supplied=(Wt-Wc)/Q23")
+(Wt-Wc)/Q23
+disp("so compressor work=301.5 KJ/kg,turbine work=603 KJ/kg,thermal efficiency=50%")