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////Chapter 13 Steam Engines
////Example 13.7 Page No 287
////Find Actual mean effective pressure
//Input data
clc;
clear;
P1=9; //Reciprocating engine pressure in bar
Pb=1.5; //Back pressure in bar
rc=100/25; //Cut-off
K=0.8; //Diagram factor
//Calculation
Pm=((P1/rc)*(1+log(rc))-Pb); //Therotical mean effective pressure Pm
Pma=Pm*K; //Actual mean effective pressure Pma
///Output
printf('Therotical mean effective pressure= %f bar \n ',Pm);
printf('Actual mean effective pressure= %f bar \n',Pma);
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