initial commit / add all books

1 files changed, 30 insertions, 0 deletions

diff --git a/2657/CH27/EX27.2/Ex27_2.sce b/2657/CH27/EX27.2/Ex27_2.sce
new file mode 100755
index 000000000..e30219abb
--- /dev/null
+++ b/2657/CH27/EX27.2/Ex27_2.sce
@@ -0,0 +1,30 @@
+//Calculations on turbocharged CI engine
+clc,clear
+//Given:
+Pr=1000 //Standard reference brake power in kW
+eta_m=90 //Mechanical efficiency in percent
+Pir=2 //Boost pressure ratio
+Tra=313 //Substitute reference air temperature in K
+Pimax=2.36 //Maximum boost pressure ratio
+h=4000 //Altitude in m
+px=61.5 //Site ambient air pressure in kPa
+Tx=323 //Site ambient temperature in K
+Tcx=310 //Charge air coolent temperature at site in K
+//Solution:
+//Refer table 27.1, 27.2 and 27.3
+m=0.7,n=1.2,q=1 //Exponents
+pr=100 //Standard total barometric pressure in kPa
+Tcr=298 //Standard charge air coolent temperature in K
+Tr=298 //Standard air temperature in K
+pra=pr*Pir/Pimax //Standard reference pressure in kPa
+pra=round(10*pra)/10
+k=(px/pra)^m*(Tra/Tx)^n*(Tcr/Tcx)^q //The ratio of indicated power
+alpha=k-0.7*(1-k)*(100/eta_m-1) //Power adjustment factor
+Px1=round(alpha*Pr) //Brake power at site in kW
+//If reference conditions are not changed
+k=(px/pr)^m*(Tr/Tx)^n*(Tcr/Tcx)^q //The ratio of indicated power
+alpha=k-0.7*(1-k)*(100/eta_m-1) //Power adjustment factor
+Px2=round(alpha*Pr) //Brake power at site in kW
+//Results:
+printf("\n Power available at an altitude of 4000m, Px = %d kW",Px1)
+printf("\n Power available at an altitude of 4000m if reference conditions are not changed, Px = %d kW\n",Px2)