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| author | priyanka | 2015-06-24 15:03:17 +0530 |
|---|---|---|
| committer | priyanka | 2015-06-24 15:03:17 +0530 |
| commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
| tree | ab291cffc65280e58ac82470ba63fbcca7805165 /2090/CH16/EX16.4/Chapter16_example4.sce | |
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initial commit / add all books
Diffstat (limited to '2090/CH16/EX16.4/Chapter16_example4.sce')
| -rwxr-xr-x | 2090/CH16/EX16.4/Chapter16_example4.sce | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/2090/CH16/EX16.4/Chapter16_example4.sce b/2090/CH16/EX16.4/Chapter16_example4.sce new file mode 100755 index 000000000..61c9f91b8 --- /dev/null +++ b/2090/CH16/EX16.4/Chapter16_example4.sce @@ -0,0 +1,38 @@ +clc
+clear
+//Input data
+d=0.06;//The diameter of the bore in m
+L=0.085;//The length of the stroke in m
+N=3000;//The speed of the engine in rpm
+r=0.35;//Torque arm radius in m
+W=160;//Weight in N
+pi=3.141;//Mathemetical constant
+f=6.6;//Fuel consumption in l/h
+g=0.78;//specific gravity of the fuel
+CV=44000;//The calorific value of the fuel in kJ/kg
+w1=114;//Brake load for cylinder 1 in N
+w2=110;//Brake load for cylinder 2 in N
+w3=112;//Brake load for cylinder 3 in N
+w4=116;//Brake load for cylinder 4 in N
+n=4;//Number of cylinders
+
+//Calculations
+Vf=(f*10^-3)/3600;//Volume flow rate of fuel in m^3/s
+df=g*1000;//The density of the fuel in kg/m^3
+mf=df*Vf;//Mass flow rate of fuel in kg/s
+T=W*r;//Torque in Nm
+bp=(2*pi*N*T)/(60*1000);//The brake power in kW
+pmb=[(120*bp*1000)/(L*(pi/4)*d^2*N*n)]/10^5;//Brake mean effective pressure in bar
+nb=[(bp)/(mf*CV)]*100;//The brake thermal efficiency in percent
+bsfc=(mf*3600)/bp;//Brake specific fuel consumption in kg/kWh
+bp1=[(2*pi*N*w1*r)/(60*1000)];//Brake power from morse test in kW
+ip1=bp-bp1;//Indicated power in kW
+ip2=bp-[(2*pi*N*w2*r)/(60*1000)];//Indicated power in kW
+ip3=bp-[(2*pi*N*w3*r)/(60*1000)];//Indicated power in kW
+ip4=bp-[(2*pi*N*w4*r)/(60*1000)];//Indicated power in kW
+ip=ip1+ip2+ip3+ip4;//Total indicated power in kW
+nm=(bp/ip)*100;//Mechanical efficiency in %
+pmi=pmb/(nm/100);//The imep in bar
+
+//Output
+printf('The brake power = %3.2f kW \n The brake mean effective pressure = %3.2f bar \n The brake thermal efficiency = %3.0f percent \n The brake specific fuel consumption = %3.3f kg/kWh \n The indicated power = %3.2f kW \n The mechanical efficiency = %3.1f percent \n The indicated mean effective pressure = %3.1f bar ',bp,pmb,nb,bsfc,ip,nm,pmi)
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