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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 /389/CH3/EX3.8/Example3_8.sce | |
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| -rwxr-xr-x | 389/CH3/EX3.8/Example3_8.sce | 48 |
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diff --git a/389/CH3/EX3.8/Example3_8.sce b/389/CH3/EX3.8/Example3_8.sce new file mode 100755 index 000000000..717757b51 --- /dev/null +++ b/389/CH3/EX3.8/Example3_8.sce @@ -0,0 +1,48 @@ +clear;
+clc;
+
+// Illustration 3.8
+// Page: 81
+printf('Illustration 3.8 - Page: 81\n\n');
+printf('Illustration 3.8 (a)\n\n');
+
+// Solution (a)
+
+//***Data****//
+// a = water b = air
+Nb = 0;
+h = 1100;// [W/square m]
+//*****//
+
+Ma = 18.02;// [kg/kmol]
+Cpa = 2090;// [J/kg.K]
+T1 = 600;// [C]
+Ti = 260;// [C]
+// The positive dirn. is taken to be from the bulk gas to the surface.
+Has = 2.684*(10^6);// enthapy of saturated steam at 1.2 std atm, rel. to the liquid at 0 C in [J/kg]
+Hai = 2.994*(10^6);// enthalpy of steam at 1 std atm, 260 C in [J/kg]
+
+// Radiation contributions to the heat transfer from the gas to the surface are negligible. Eqn. 3.70 reduces to
+Na = -((h/(Ma*Cpa))*log(1-((Cpa*(T1-Ti))/(Has-Hai))));// [kmol/square m.s]
+printf('The rate of steam flow reqd. is %f kmol/square m.s\n\n',Na);
+// negative sign indicates that the mass flux is into the gas
+
+printf('Illustration 3.8 (b)\n\n');
+
+// Solution (b)
+
+//***Data****//
+// a = water b = air
+h = 572;// [W/square m]
+T1 = 25;// [C]
+//******//
+
+Ti = 260;// [C]
+// The positive dirn. is taken to be from the bulk gas to the surface.
+Has = 1.047*10^(5);// enthapy of saturated steam at 1.2 std atm, rel. to the liquid at 0 C in [J/kg]
+Hai = 2.994*(10^6);// enthalpy of steam at 1 std atm, 260 C in [J/kg]
+
+// Radiation contributions to the heat transfer from the gas to the surface are negligible. Eqn. 3.70 reduces to
+Na = -((h/(Ma*Cpa))*log(1-((Cpa*(T1-Ti))/(Has-Hai))));// [kmol/square m.s]
+printf('The rate of steam flow reqd. is %f kmol/square m.s',Na);
+// negative sign indicates that the mass flux is into
\ No newline at end of file |