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Diffstat (limited to '3821/CH13/EX13.8/Example13_8.sce')
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1 files changed, 23 insertions, 0 deletions
diff --git a/3821/CH13/EX13.8/Example13_8.sce b/3821/CH13/EX13.8/Example13_8.sce new file mode 100644 index 000000000..6f64b2048 --- /dev/null +++ b/3821/CH13/EX13.8/Example13_8.sce @@ -0,0 +1,23 @@ +////Chapter 13 Steam Engines
+////Example 13.8 Page No 288
+////Find Diagram factor
+//Input data
+clc;
+clear;
+P1=10; //Inlet pressure
+Pb=1; //Back pressure
+rc=3; //Expansion ratio
+a=12.1; //Area of indicator diagram
+b=7.5; //Length of indicator diagram
+S=3; //Pressure scale
+
+
+//Calculation
+Pm=round((P1/rc)*(1+log(rc))-Pb ); //Therotical mean effective pressure Pm
+Pma=a/b*S; //Actual mean effective pressure Pma
+K=Pma/Pm; //Diagram factor
+
+///Output
+printf('Therotical mean effective pressure= %f bar \n',Pm);
+printf('Actual mean effective pressure= %f bar \n',Pma);
+printf('Diagram factor= %f \n',K);
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