Problem 3: A plate is exposed to hot fluid at T700°C and h- 323 W/m2 K. The plate has an initial temperature of 20°C. How long should the plate expose to the hot fluid before reaching 500°C at the center of the plate? The plate is made of made of Boron. %3D

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Problem 3: A plate is exposed to hot fluid at T=700°C and h = 323 W/m2-K. The plate has an initial temperature
of 20°C. How long should the plate expose to the hot fluid before reaching 500°C at the center of the plate? The
plate is made of made of Boron.
%3D
= 700°C
h = 323 W/m²-K
2L = 5 cm
Stainless
el
plate
T,= 20°C
Transcribed Image Text:Problem 3: A plate is exposed to hot fluid at T=700°C and h = 323 W/m2-K. The plate has an initial temperature of 20°C. How long should the plate expose to the hot fluid before reaching 500°C at the center of the plate? The plate is made of made of Boron. %3D = 700°C h = 323 W/m²-K 2L = 5 cm Stainless el plate T,= 20°C
a x 106
m/s
100
Point,
k
Cp
J/kg-K W/m-K
Composition
kg/m3
200
400
600
800
1000
Aluminum:
903
97.1
302
237
240
949
231
1033
186
218
1146
Pure
933
2702
237
482
65
798
163
Alloy 2024-T6
(4.5% Cu, 1.5% Mg.
0.6% Mn)
Alloy 195, Cast
(4.5% Cu)
Beryllium
775
2770
875
177
73.0
186
473
787
925
1042
185
126
174
2790
1850
883
1825
168
200
68.2
59.2
106
2823
90.8
301
1114
9.69
120
161
2191
7.04
1550
990
3018
203
16.5
112
9.76 190
128
2604
Bismuth
545
9780
122
7.86
6.59
127
16.8
1463
10.6
1892
9.60
2160 2338
Boron
2573
2500
1107
27.0
55.5
9.85
600
Transcribed Image Text:a x 106 m/s 100 Point, k Cp J/kg-K W/m-K Composition kg/m3 200 400 600 800 1000 Aluminum: 903 97.1 302 237 240 949 231 1033 186 218 1146 Pure 933 2702 237 482 65 798 163 Alloy 2024-T6 (4.5% Cu, 1.5% Mg. 0.6% Mn) Alloy 195, Cast (4.5% Cu) Beryllium 775 2770 875 177 73.0 186 473 787 925 1042 185 126 174 2790 1850 883 1825 168 200 68.2 59.2 106 2823 90.8 301 1114 9.69 120 161 2191 7.04 1550 990 3018 203 16.5 112 9.76 190 128 2604 Bismuth 545 9780 122 7.86 6.59 127 16.8 1463 10.6 1892 9.60 2160 2338 Boron 2573 2500 1107 27.0 55.5 9.85 600
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