diff options
Diffstat (limited to '2657/CH14/EX14.2')
| -rwxr-xr-x | 2657/CH14/EX14.2/Ex14_2.sce | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/2657/CH14/EX14.2/Ex14_2.sce b/2657/CH14/EX14.2/Ex14_2.sce new file mode 100755 index 000000000..1e59e3e21 --- /dev/null +++ b/2657/CH14/EX14.2/Ex14_2.sce @@ -0,0 +1,16 @@ +//Variation of bsfc with speed +clc,clear +//Given: +eta_it=30 //Indicated thermal efficiency in percent +fp_1500=18 //Friction power at 1500 rpm in kW +fp_2500=45 //Friction power at 2500 rpm in kW +bp=75 //Brake power in kW +CV=44000 //Calorific value of fuel in kJ/kg +//Solution: +isfc=3600/(CV*eta_it/100) //Indicated specific fuel consumption in kg/kWh +eta_m_1500=bp/(bp+fp_1500) //Mechanical efficiency at 1500 rpm +bsfc_1500=isfc/eta_m_1500 //Brake specific fuel consumption at 1500 rpm in kg/kWh +eta_m_2500=bp/(bp+fp_2500) //Mechanical efficiency at 2500 rpm +bsfc_2500=isfc/eta_m_2500 //Brake specific fuel consumption at 2500 rpm in kg/kWh +//Results: +printf("\n The brake specific fuel consumption\n\tat 1500 rpm, bsfc_1500 = %.3f kg/kWh\n\tat 2500 rpm, bsfc_2500 = %.3f kg/kWh\n\n",bsfc_1500,bsfc_2500) |