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Diffstat (limited to '3733/CH24/EX24.8/Ex24_8.sce')
-rw-r--r-- | 3733/CH24/EX24.8/Ex24_8.sce | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/3733/CH24/EX24.8/Ex24_8.sce b/3733/CH24/EX24.8/Ex24_8.sce new file mode 100644 index 000000000..800238ee5 --- /dev/null +++ b/3733/CH24/EX24.8/Ex24_8.sce @@ -0,0 +1,29 @@ +// Example 24_8
+clc;funcprot(0);
+//Given data
+p_1=1;// bar
+p_2=5;// bar
+p_i=2.5;// bar
+T_1=27+273;// K
+T_3=900;// K
+T_5=T_3;// K
+r=1.4;// Specific heat ratio
+CV=40000;// kJ/kg
+r=1.4;// Spcific heat ratio for air and gases
+C_p=1;// kJ/kg-k for air and gases
+m_a=10;// kg/sec
+C_pg=C_p;
+C_pa=C_p
+
+//Calculation
+T_2=T_1*(p_2/p_1)^((r-1)/r);// K
+T_4=T_3*(p_i/p_2)^((r-1)/r);// K
+T_6=T_5*(p_1/p_i)^((r-1)/r);// K
+m_f1=1/((CV/(T_3-T_2))-1);// kg/kg of air
+m_f2=1/((CV/(T_5-T_4))-(1+m_f1));// kg/kg of air
+W_net=(C_pg*(1+m_f1)*(T_3-T_4))+(C_pg*(1+m_f1+m_f2)*(T_5-T_6))-(C_pa*(T_2-T_1));//Net work done per kg of air flow in kJ/kg of air
+Q_net=(m_f1+m_f2)*CV;// Net heat supplied per kg of air passing through the system in kJ.
+n_th=(W_net/Q_net)*100;// Thermal efficiency in %
+P=m_a*W_net;// Capacity of the plant in kW
+printf('\nThermal efficiency=%0.1f percentage \nPlant capacity=%0.1f MW',n_th,P/10^3);
+// The answer vary due to round off error
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