initial commit / add all books

1 files changed, 23 insertions, 0 deletions

diff --git a/3843/CH8/EX8.11/Ex8_11.sce b/3843/CH8/EX8.11/Ex8_11.sce
new file mode 100644
index 000000000..65dabffea
--- /dev/null
+++ b/3843/CH8/EX8.11/Ex8_11.sce
@@ -0,0 +1,23 @@
+// Example 8_11

+clc;funcprot(0);

+// Given data

+T_1=-10;// °C

+T_3=40;// °C

+P_1=0.15;// MPa

+n_c=0.80;// The efficiency of the compressor

+mdot=0.6;// kg/s

+

+// Calculation

+// From appendix D we find,using T_3=40°C

+h_4=74.5;// kJ/kg

+h_3=h_4;// kJ/kg

+// From table D-3 at P_1=0.15 MPa and T_1=10°C

+h_1=185;// kJ/kg

+s_1=0.732;// kJ/kg.K

+s_2a=s_1;// kJ/kg.K

+P_2=1.0;// MPa

+h_2a=(((0.732-0.7254)/(0.7476-0.7254))*(225.3-217.8))+218;// kJ/kg

+h_2=((h_2a-h_1)/n_c)+h_1;// kJ/kg

+Q_E=mdot*(h_1-h_4);// The rate of refrigeration in kW

+COP=Q_E/(mdot*(h_2-h_1));// The coefficient of performance 

+printf("\nThe rate of refrigeration,Q_E=%2.1f kW \nThe coefficient of performance,COP=%1.2f",Q_E,COP);