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HEAT TRANSFER

Heat Transfer
Calburn analogy is applicable for the value of Prandtl number from

0.6 to 120
120 to 400
0.5 to 5
0.001 to 1

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Heat Transfer
Conduction occurs in the buffer zone for a fluid flowing through a heated pipe, only when Prandtl number is

< 1
>1
L
0.1

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Heat Transfer
Conductance is given by(where, x = thickness, A = heat flow area, K = thermal conductivity.)

KA/x
A/Kx
K/Ax
X/KA

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Heat Transfer
Baffles are provided in heat exchangers to increase the

Heat transfer co-efficient
Fouling factor
Heat transfer rate
Heat transfer area

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Heat Transfer
What is the geometric mean of two heat transfer areas A₁ and A₂ ?

1/2 √(A₁ . A₂)
√(A₁ . A₂)
√(A₁ + A₂)
2 √(A₁ . A₂)

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