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Diffstat (limited to '1808/CH1/EX1.18/Chapter1_Example18.sce')
| -rw-r--r-- | 1808/CH1/EX1.18/Chapter1_Example18.sce | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/1808/CH1/EX1.18/Chapter1_Example18.sce b/1808/CH1/EX1.18/Chapter1_Example18.sce new file mode 100644 index 000000000..d5ebc4e83 --- /dev/null +++ b/1808/CH1/EX1.18/Chapter1_Example18.sce @@ -0,0 +1,32 @@ +clc
+clear
+//INPUT DATA
+W=160;//load on dynamometer in N
+N=3000;//speed of engine in rpm
+Dy=20420;//Dynamometer constnat
+L=0.09;//stroke in m
+d=0.06;//bore in m
+nc=4;//number of cylinders
+n=2;//for four cylinders
+mf=4.95;//fuel consumption in kg/h
+cv=42500;//calorific value
+BP1c=16.5;//Brake power of 1st cylinder
+BP2c=16;//Brake power of 2nd cylinder
+BP3c=15.6;//Brake power of 3rd cylinder
+BP4c=17.6;//Brake power of 4th cylinder
+
+//CALCULATIONS
+BP4=W*N/Dy;//Brake power in kW
+pmb=(BP4*60*n)/(L*(3.14*(d^2)/4)*N*nc*4);//Brake ean effective pressure in kN/m^2
+nbt=(BP4*3600/(mf*cv))*100;//Brake thermal efficiency in percentage
+IP1=BP4-BP1c;//Indicated power of 1st cylinder
+IP2=BP4-BP2c;//Indicated power of 2nd cylinder
+IP3=BP4-BP3c;//Indicated power of 3rd cylinder
+IP4=BP4-BP4c;//Indicated power of 4th cylinder
+IP=IP1+IP2+IP3+IP4;//Total indicated power in kW
+nm=(BP4/IP)*100;//Mechanical efficiency in percentage
+bsfc=mf/BP4;//Brake specific fuel consumption in kg/kWh
+
+//OUTPUT
+printf('(i)Brake power is %3.3f kW \n (ii)Brake mean effective pressure is %3.3f kN/m^2 \n (iii)brake thermal efficiency is %3.2f percentage \n (iv)mechanical efficiency is %3.3f percentage \n (v)Brake specific fuel consumption %3.3f kg/kW.hr ',BP4,pmb,nbt,nm,bsfc)
+
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