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Diffstat (limited to '2657/CH27/EX27.4/Ex27_4.sce')
-rwxr-xr-x | 2657/CH27/EX27.4/Ex27_4.sce | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/2657/CH27/EX27.4/Ex27_4.sce b/2657/CH27/EX27.4/Ex27_4.sce new file mode 100755 index 000000000..78712b62e --- /dev/null +++ b/2657/CH27/EX27.4/Ex27_4.sce @@ -0,0 +1,29 @@ +//Simulating site ambient conditions +clc,clear +//Given: +//Datas are taken from Ex. 27.3 +Px=640 //Brake power at site in kW +eta_m=85 //Mechanical efficiency in percent +px=70 //Site ambient air pressure in kPa +py=100 //Standard total barometric pressure in kPa +Tx=330 //Site ambient temperature in K +Ty=300 //Test ambient temperature in K +p2_py=2.5 //Pressure ratio +by=238 //Specific fuel consumption at test in g/kWh +//Solution: +//Refer table 27.1, 27.2 and 27.3 +m=0.7,n=1.2,q=1 //Exponents +ky=(py/px)^m //The ratio of indicated power at test +alphay=ky-0.7*(1-ky)*(100/eta_m-1) //Power adjustment factor at test +Py=round(Px*alphay) //Brake power at test in kW +//From fig 27.1 +Tx_Ty=Tx/Ty //Temperature ratio +p1_py=0.925 //Ratio +p1=p1_py*py //Air pressure after throttle in kPa (printing error) +Betay=ky/alphay //Fuel consumption adjustment factor at test +bx=by/Betay //Specific fuel consumption at site in g/kWh +//Results: +printf("\n Power developed on the test bed, Py = %d kW",Py) +printf("\n The pressure behind the throttle plate, p1 = %.1f kPa",p1) +printf("\n The fuel consumption adjusted to site ambient conditions, bx = %d g/kWh",bx) +//Answer in the book is printed wrong |