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Diffstat (limited to '2090/CH4/EX4.11/Chapter4_Example11.sce')
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1 files changed, 21 insertions, 0 deletions
diff --git a/2090/CH4/EX4.11/Chapter4_Example11.sce b/2090/CH4/EX4.11/Chapter4_Example11.sce new file mode 100755 index 000000000..6eff40792 --- /dev/null +++ b/2090/CH4/EX4.11/Chapter4_Example11.sce @@ -0,0 +1,21 @@ +clc
+clear
+//Input data
+p=65;//The pressure in the cylinder in bar
+r=10;//The compression ratio
+V3=0.1;//The volume per unit mass of air at the start of expansion in m^3/kg air
+p3=p*100;//The pressure in the cylinder after the completion of combustion in kN/m^2
+
+//Calculations
+T3=2240;//The temperature from the chart corresponding to p3,V3 in K
+u3=-1040;//The energy from the chart in kJ/kg air
+s3=8.87;//The entropy from the chart in kJ/kg air K
+s4=s3;//Since the process is isentropic
+V4=r*V3;//The volume per unit mass of air at the end of expansion stroke in m^3/kg air
+T4=1280;//The temperature from the chart corresponding to p4,V4 in K
+u4=-2220;//The energy from the chart in kJ/kg air
+p4=4.25;//The pressure from the chart in bar
+W=-(u4-u3);//Work of expansion in kJ/kg air
+
+//Output
+printf('(a)At the end of expansion stroke, \n The pressure is %3.2f bar \n The temperature is %3.0f K \n The volume is %3.1f m^3/kg air \n (b)The work during the expansion stroke is %3.0f kJ/kg air ',p4,T4,V4,W)
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