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)-0.2

(D)0.2

(D)-1.8

(D)1.8

(D)-0.2

(D)0.2

(D)-1.8

(D)1.8

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Heat Transfer
The advantage of backward feed multiple effect evaporators over forward feed units is that

Heat sensitive material can be handled

There is no additional cost of pumping

Most concentrated liquid is at highest temperature

Equal heat transfer co-efficients exist in various effects

Heat sensitive material can be handled

There is no additional cost of pumping

Most concentrated liquid is at highest temperature

Equal heat transfer co-efficients exist in various effects

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Heat Transfer
Double pipe heat exchangers are used

because it is less costly

when heat transfer area required is very low

because it occupies less floor area

when heat transfer area required is very high

because it is less costly

when heat transfer area required is very low

because it occupies less floor area

when heat transfer area required is very high

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Heat Transfer
A composite flat wall of a furnace is made of two materials 'A' and 'B'. The thermal conductivity of 'A' is twice of that of material 'B', while the thickness of layer of 'A' is half that of B. If the temperature at the two sides of the wall are 400 and 1200°K, then the temperature drop (in °K) across the layer of material 'A' is

125

150

160

133

125

150

160

133

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Heat Transfer
For a multipass shell and tube heat exchanger, the LMTD correction factor is always

> 1

Between 1 & 2

< 1

1

> 1

Between 1 & 2

< 1

1

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Heat Transfer
In the free convection regime of pool boiling, the heat flux is proportional to

Δt5/4

Δt1/2

Δt

Δt2

Δt5/4

Δt1/2

Δt

Δt2

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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 The advantage of backward feed multiple effect evaporators over forward feed units is that

Heat Transfer Double pipe heat exchangers are used

Heat Transfer For a multipass shell and tube heat exchanger, the LMTD correction factor is always

Heat Transfer In the free convection regime of pool boiling, the heat flux is proportional to

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
The advantage of backward feed multiple effect evaporators over forward feed units is that

Heat Transfer
Double pipe heat exchangers are used

Heat Transfer
For a multipass shell and tube heat exchanger, the LMTD correction factor is always

Heat Transfer
In the free convection regime of pool boiling, the heat flux is proportional to