initial commit / add all books

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+clc;funcprot(0);//EXAMPLE 20.27

+// Initialisation of Variables

+ns=3;......//No of stages

+p1=1.05;......//Intake pressure in bar

+pd=40;..........//Delivery pressure in bar

+V=3;..........//Volume of air xupplied per min in m^3

+n=1.25;........//Compression index

+//Calculations

+Wd=((ns*n)/(n-1))*p1*V*10^5*(((pd/p1)^((n-1)/(ns*n)))-1);..........//Work done per min in Nm

+disp(Wd,"Work done in Nm:")

+isoWd=10^5*p1*V*log(pd/p1);..........//Isothermal work done in Nm

+disp(isoWd,"Isothermal work done in Nm:")

+etaiso=isoWd/Wd;...............//Isothermal efficiency

+disp(etaiso*100,"Isothermal efficiency in %:")

+wdss=((n)/(n-1))*p1*V*10^5*(((pd/p1)^((n-1)/(n)))-1);..........//Single stage Work done per min in Nm

+disp(wdss,"Single stage work done per min in Nm:")

+perws=(wdss-Wd)/wdss;.......//Percentage of work saved

+disp(perws*100,"Percentage of work saved:")