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To determine the sightly oestrus transfer coefficient for a heated tube deep down a tube swan at different execute rates.
To study the coitusship of the pressure drop across the tube bank normal to the air velocity.
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Both manometer tube should be initially set in the upright positions before scratch line the fan Pitot tube head is positioned approximately in the subject matter of the duct and parallel to the walls of the duct
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The temperature difference between the tube step to the fore and inlet ambient air should maintain constant of 40 ±1 °c
The surface temperature of heated tube should always be lower than 80 °c The reading must be made only when the temperature arrives its steady state
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Velocity Profile
8
6 4 2
Pitot position (cm)
0 0 -2 -4 -6 -8 2 4 6 8 10 12
275mmH2O
Velocity (m/s)
The relation between fairish heat transfer coefficient and the average air velocity
Average heat transfer coefficient (W/m2C)
140 120 100
y = 7.4091x + 51.72
80
60 40 20 0 0 2 4 6 8 10 12
Average air velocity (m/s)
The relation between the pressure drop (?p) across the tube bank and the average air velocity
700 600
y = 80.609x - 251.
35
Pressure drop (Pa)
d 400 300 200 100 0 0 2 4 6
y = 72.567x - 231.15
Experiment Empirical
8 10 12
Average air velocity (m/s)
The relation between the dimensionless heat transfer statement (NuD) and the dimensionless of flow parameter (ReD)
70 60 50 40
y = 0.0048x + 23.285 y = 0.0039x + 13.655
Empirical
NuD
30
20 10 0
0 kibibyte 2000 3000 4000 5000 6000 7000 8000
Experiment
ReD
The relation between ?p/?V2 and the dimensionless flow parameter (ReD)
6
5.5
5
y = -0.0002x + 6.3172
?p/?V2
4.5 4 3.5 3 2.5
2
0 1000 2000 3000 4000 5000 6000 7000 8000
ReD
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