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Diffstat (limited to '1808/CH1/EX1.5')
| -rw-r--r-- | 1808/CH1/EX1.5/Chapter1_Example5.sce | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/1808/CH1/EX1.5/Chapter1_Example5.sce b/1808/CH1/EX1.5/Chapter1_Example5.sce new file mode 100644 index 000000000..cd372e372 --- /dev/null +++ b/1808/CH1/EX1.5/Chapter1_Example5.sce @@ -0,0 +1,28 @@ +clc
+clear
+//INPUT DATA
+N=1500;//speed in rpm
+T=150;//Torque developed in Nm
+mf=6;//fuel consumption in kg/h
+cv=42000;//calorific value in kJ/kg
+L=0.15;//Stroke in m
+d=0.12;//bore in m
+n=2;//for four cylinders
+pa=1;//Atmospheric pressure in bar
+Ta=293;//Room temperature in K
+Ra=0.287;//Gas constant
+hw=0.06;//Head of orifice in m
+rw=1000;//density of water in kg/m^3
+
+//CALCULATIONS
+BP=2*3.14*(N/60)*(T/1000);//Brake power in kW
+nbt=(BP/((mf/3600)*cv))*100;//Brake thermal efficiency in percentage
+Pmb=(BP*60*n/(L*(3.14*d^2/4)*N));//brake ean pressure in kPa
+ra=(pa/(Ra*Ta))*100;//density of air in kg/m^3
+ha=((hw*rw)/ra);//Air inhaled in m
+Va=0.62*(3.14*0.03^2/4)*(2*9.81*ha)^(1/2);//Air inhaled in m^3/s
+Vs=((3.14*d^2/4)*L*N/(n*60));//Swept volume in m^3/s
+nv=(Va/Vs)*100;//Volumetric efficiency in percentage
+
+//OUTPUT
+printf('(i)Brake thermal efficiency is %3.2f percentage \n (ii)Brake mean effective pressure is %3.2f kPa \n (iv)Volumetric efficiency is %3.d percentage',nbt,Pmb,nv)
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