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| author | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
|---|---|---|
| committer | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
| commit | 7f60ea012dd2524dae921a2a35adbf7ef21f2bb6 (patch) | |
| tree | dbb9e3ddb5fc829e7c5c7e6be99b2c4ba356132c /3821/CH13/EX13.14 | |
| parent | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (diff) | |
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| -rw-r--r-- | 3821/CH13/EX13.14/Example13_14.sce | 29 |
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diff --git a/3821/CH13/EX13.14/Example13_14.sce b/3821/CH13/EX13.14/Example13_14.sce new file mode 100644 index 000000000..29a620c82 --- /dev/null +++ b/3821/CH13/EX13.14/Example13_14.sce @@ -0,0 +1,29 @@ +////Chapter 13 Steam Engines
+////Example 13.14 Page No 294
+///Example Mechanical efficiency
+//Input data
+clc;
+clear;
+D=300*10^-3; //steam engine bor
+L=400*10^-3; //stroke
+Db=1.5; //effective brake diameter
+W=6.2*10^3; //net load on the brake
+N=180; //speed of engine in rpm
+Pma=6.5*10^3; //mean effective pressure in bar
+pi=3.142;
+A=((pi/4)*0.3^2);
+dr=0;
+S=0;
+
+//Calculation
+Ip=((2*Pma*L*A*N)/60000)*100; //Indicated power of steam engine in Kw
+T=(W-S)*((Db+dr)/2); //Torque in Nm
+Bp=2*pi*N*T/ 60000; //Break power Kw
+eta=(Bp/Ip)*100; //Mechanical efficiency in%
+
+
+//Output
+printf('Indicated power of steam engine= %f Kw \n',Ip);
+printf('Torque=%f Nm \n',T);
+printf('Break power= %f Kw \n ',Bp);
+printf('Mechanical efficiency= %f percent \n ',eta);
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