The Sieder-Tate correlation for heat transfer in turbulent flow in pipe gives Nu α Re0.8, where, Nu is the Nusselt number and Re is the Reynolds number for the flow. Assuming that this relation is valid, the heat transfer co-efficient varies with the pipe diameter (D) as

Heat Transfer
The Sieder-Tate correlation for heat transfer in turbulent flow in pipe gives Nu α Re0.8, where, Nu is the Nusselt number and Re is the Reynolds number for the flow. Assuming that this relation is valid, the heat transfer co-efficient varies with the pipe diameter (D) as

(D)-1.8

(D)0.2

(D)1.8

(D)-0.2

(D)-1.8

(D)0.2

(D)1.8

(D)-0.2

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Heat Transfer
Double pipe heat exchangers are used

when heat transfer area required is very high

when heat transfer area required is very low

because it occupies less floor area

because it is less costly

when heat transfer area required is very high

when heat transfer area required is very low

because it occupies less floor area

because it is less costly

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Heat Transfer
A process stream of dilute aqueous solution flowing at the rate of10 Kg.s⁻¹ is to be heated. Steam condensate at 95°C is available for heating purpose, also at a rate of 10 Kg.s⁻¹. A 1 - 1 shell and tube heat exchanger is available. The best arrangement is

Counter flow with process stream on shell side

Parallel flow with process stream on tube side

Parallel flow with process stream on shell side

Counter flow with process stream on tube side

Counter flow with process stream on shell side

Parallel flow with process stream on tube side

Parallel flow with process stream on shell side

Counter flow with process stream on tube side

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Heat Transfer
The critical radius of insulation for a spherical shell is (where, K = thermal conductivity of insulating material h0 = heat transfer coefficient at the outer surface)

h0/K

2K/h0

h0/2K

K/h0

h0/K

2K/h0

h0/2K

K/h0

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Heat Transfer
Prandtl and Reynolds analogy are same, when Prandtl number is

0.5

> 2

1

1.5

0.5

> 2

1

1.5

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Heat Transfer
If the thermal conductivity of a wall material is independent of temperature, the steady state temperature distribution in the very large thin plane wall having steady, uniform surface temperature follows __________ law.

Linear

Hyperbolic

Logarithmic

Parabolic

Linear

Hyperbolic

Logarithmic

Parabolic

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Heat Transfer

Heat Transfer The Sieder-Tate correlation for heat transfer in turbulent flow in pipe gives Nu α Re0.8, where, Nu is the Nusselt number and Re is the Reynolds number for the flow. Assuming that this relation is valid, the heat transfer co-efficient varies with the pipe diameter (D) as

Heat Transfer Double pipe heat exchangers are used

Heat Transfer A process stream of dilute aqueous solution flowing at the rate of10 Kg.s⁻¹ is to be heated. Steam condensate at 95°C is available for heating purpose, also at a rate of 10 Kg.s⁻¹. A 1 - 1 shell and tube heat exchanger is available. The best arrangement is

Heat Transfer The critical radius of insulation for a spherical shell is (where, K = thermal conductivity of insulating material h0 = heat transfer coefficient at the outer surface)

Heat Transfer Prandtl and Reynolds analogy are same, when Prandtl number is

Heat Transfer If the thermal conductivity of a wall material is independent of temperature, the steady state temperature distribution in the very large thin plane wall having steady, uniform surface temperature follows __________ law.

Heat Transfer
The Sieder-Tate correlation for heat transfer in turbulent flow in pipe gives Nu α Re0.8, where, Nu is the Nusselt number and Re is the Reynolds number for the flow. Assuming that this relation is valid, the heat transfer co-efficient varies with the pipe diameter (D) as

Heat Transfer
Double pipe heat exchangers are used

Heat Transfer
A process stream of dilute aqueous solution flowing at the rate of10 Kg.s⁻¹ is to be heated. Steam condensate at 95°C is available for heating purpose, also at a rate of 10 Kg.s⁻¹. A 1 - 1 shell and tube heat exchanger is available. The best arrangement is

Heat Transfer
The critical radius of insulation for a spherical shell is (where, K = thermal conductivity of insulating material h0 = heat transfer coefficient at the outer surface)

Heat Transfer
Prandtl and Reynolds analogy are same, when Prandtl number is

Heat Transfer
If the thermal conductivity of a wall material is independent of temperature, the steady state temperature distribution in the very large thin plane wall having steady, uniform surface temperature follows __________ law.