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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 /1244/CH9/EX9.18 | |
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initial commit / add all books
Diffstat (limited to '1244/CH9/EX9.18')
| -rwxr-xr-x | 1244/CH9/EX9.18/Example918.sce | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/1244/CH9/EX9.18/Example918.sce b/1244/CH9/EX9.18/Example918.sce new file mode 100755 index 000000000..e9c25b03a --- /dev/null +++ b/1244/CH9/EX9.18/Example918.sce @@ -0,0 +1,32 @@ +
+
+// Display mode
+mode(0);
+
+// Display warning for floating point exception
+ieee(1);
+
+clc;
+disp("Principles of Heat Transfer, 7th Ed. Frank Kreith et. al Chapter - 9 Example # 9.18 ")
+
+//Emissivity
+epsilon = 0.8;
+//Stefan's constant
+sigma = 0.1714;
+//Temperature of walls in degree F
+Twall = 440;
+//Temperature indicated ny thermocouple in degree F
+Tt = 940;
+//Heat transfer coefficient in Btu/h ft2 F
+h = 25;
+
+//The temperature of the thermocouple is below the gas temperature because the couple loses heat by radiation to the wall.
+
+//Under steady-state conditions the rate of heat flow by radiation from the thermocouple junction to the wall equals the rate of heat flow by convection from the gas to the couple.
+
+//Using this heat balance, q/A in Btu/h ft2
+q = (epsilon*sigma)*(((Tt+460)/100)^4-((Twall+460)/100)^4);
+
+disp("True gas temperature in degree F")
+//True gas temperature in degree F
+Tg = Tt+q/h
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