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| author | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
|---|---|---|
| committer | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
| commit | 7f60ea012dd2524dae921a2a35adbf7ef21f2bb6 (patch) | |
| tree | dbb9e3ddb5fc829e7c5c7e6be99b2c4ba356132c /534/CH7/EX7.5 | |
| parent | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (diff) | |
| download | Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.tar.gz Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.tar.bz2 Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.zip | |
initial commit / add all books
Diffstat (limited to '534/CH7/EX7.5')
| -rw-r--r-- | 534/CH7/EX7.5/7_5_Hydrogen_fuel_cell.sce | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/534/CH7/EX7.5/7_5_Hydrogen_fuel_cell.sce b/534/CH7/EX7.5/7_5_Hydrogen_fuel_cell.sce new file mode 100644 index 000000000..3f8208c16 --- /dev/null +++ b/534/CH7/EX7.5/7_5_Hydrogen_fuel_cell.sce @@ -0,0 +1,32 @@ +clear;
+clc;
+printf('FUNDAMENTALS OF HEAT AND MASS TRANSFER \n Incropera / Dewitt / Bergman / Lavine \n EXAMPLE 7.5 Page 431 \n'); //Example 7.5
+// Convective Heat transfer to the canister and the additional heating needed
+
+//Operating Conditions
+v = 23; //[m/s] Air velocity
+Tsurr = 296; //[K] Surrounding Air Temperature
+L = .8; //[m] Length of cylinder
+Di = .1; //[m] Diameter of cylinder
+t = .005; //[m] Thickness of cylinder
+
+//Table A.4 Air Properties at T = 285K
+uv = 14.56*10^-6; //[m^2/s] Kinematic Viscosity
+k = 25.2*10^-3; //[W/m.K] Thermal conductivity
+Pr = .712; //Prandtl Number
+//Table A.1 AISI 316 Stainless steel Properties at T = 300K
+kss = 13.4; //[W/m.K]Conductivity
+
+pH2 = 1.01; //[N]
+Ti = -3550/(2.30*log10(pH2) - 12.9);
+Eg = -(1.35*10^-4)*(29.5*10^6);
+
+Re = v*(Di+2*t)/uv; //Reynolds number
+// Equation 7.54
+Nu = .3+.62*Re^.5*Pr^.3334/[1+(.4/Pr)^.6668]^.25*[1+(Re/282000)^(5/8)]^.8;
+h = Nu*k/(Di+2*t);
+
+qconv = (Tsurr-Ti)/[(1/(%pi*L*(Di+2*t)*h))+(2.30*log10((Di+2*t)/Di)/(2*%pi*kss*L))];
+printf("\n Additional Thermal Energy must be supplied to canister to mainatin steady-state operating temperatue %i W",-qconv-Eg);
+
+//END
\ No newline at end of file |