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Diffstat (limited to '2657/CH1/EX1.7/Ex1_7.sce')
| -rwxr-xr-x | 2657/CH1/EX1.7/Ex1_7.sce | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/2657/CH1/EX1.7/Ex1_7.sce b/2657/CH1/EX1.7/Ex1_7.sce new file mode 100755 index 000000000..fda20d8dd --- /dev/null +++ b/2657/CH1/EX1.7/Ex1_7.sce @@ -0,0 +1,24 @@ +//Calculations on two stroke CI engine
+clc,clear
+//Given:
+bp=5000 //Brake power in kW
+fp=1000 //Friction power in kW
+m_f=2300 //Fuel consumption in kg/hr
+A_F=20/1 //Air-fuel ratio
+CV=42000 //Calorific value of fuel in kJ/kg
+//Solution:
+//(a)
+ip=bp+fp //Indicated power in kW
+//(b)
+eta_m=bp/ip //Mechanical efficiency
+//(c)
+m_a=A_F*m_f //Air consumption in kg/hr
+//(d)
+eta_it=ip*3600/(m_f*CV) //Indicated thermal efficiency
+//(e)
+eta_bt=eta_it*eta_m //Brake thermal efficiency
+//Results:
+printf("\n (a)The indicated power, ip = %d kW",ip)
+printf("\n (b)The mechanical efficiency, eta_m = %d percent",eta_m*100)
+printf("\n (c)The air consumption, m_a = %d kg/hr",m_a)
+printf("\n (d)The indicated thermal efficiency, eta_it = %.1f percent\n (e)The brake thermal efficiency, eta_bt = %.1f percent\n\n",eta_it*100,eta_bt*100)
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