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| author | priyanka | 2015-06-24 15:03:17 +0530 |
|---|---|---|
| committer | priyanka | 2015-06-24 15:03:17 +0530 |
| commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
| tree | ab291cffc65280e58ac82470ba63fbcca7805165 /551/CH14/EX14.11 | |
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initial commit / add all books
Diffstat (limited to '551/CH14/EX14.11')
| -rwxr-xr-x | 551/CH14/EX14.11/11.sce | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/551/CH14/EX14.11/11.sce b/551/CH14/EX14.11/11.sce new file mode 100755 index 000000000..6b75dc31d --- /dev/null +++ b/551/CH14/EX14.11/11.sce @@ -0,0 +1,55 @@ +clc
+y=1.4;
+cp=1.003; //kJ/kg K
+T3=289; //K
+T1=314; //K
+p1=5.2; //bar
+p2=1; //bar
+capacity=6; //tonnes
+R=287; //J/kg K
+l=0.2; //m
+
+T4=T3*(p1/p2)^((y-1)/y);
+T2=T1*(p2/p1)^((y-1)/y);
+
+
+disp("(i) C.O.P. =")
+COP=T2/(T1-T2);
+disp(COP)
+
+disp("(ii) Mass of air in circulation")
+e=cp*(T3-T2); //Refrigerating effect per kg of air
+E=capacity*14000; //Refrigerating effect produced by the refrigerating machine in kJ/h
+
+m=E/e/60;
+disp("mass of air in circulation =")
+disp(m)
+disp("kg/min")
+
+
+disp("Piston displacement of compressor")
+V3=m*R*T3/p2/10^5;
+
+V_swept=V3/2/240;
+
+d_c=sqrt(V_swept/l/%pi*4);
+
+disp("Diameter or bore of the compressor cylinder =")
+disp(d_c*1000)
+disp("mm")
+
+disp("Piston displacement of expander")
+V2=m*R*T2/p2/10^5;
+V_swept=V2/2/240;
+
+d_c=sqrt(V_swept/l/%pi*4);
+disp("Diameter or bore of the expander cylinder =")
+disp(d_c*1000)
+disp("mm")
+
+
+disp("(v) Power required to drive the unit")
+W=capacity*14000/COP/3600;
+disp("power =")
+disp(W)
+disp("kW")
\ No newline at end of file |