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)1.8

(D)-0.2

(D)-1.8

(D)0.2

(D)1.8

(D)-0.2

(D)-1.8

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Heat Transfer
The overall heat transfer co-efficient for a shell and tube heat exchanger for clean surfaces is U0 = 400 W/m².K. The fouling factor after one year of operation is found to be hd0 = 2000 W/m².K. The overall heat transfer co-efficient at this time is

333W/m².K

1200W/m².K

894W/m².K

287 W/m².K

333W/m².K

1200W/m².K

894W/m².K

287 W/m².K

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Heat Transfer
Steam economy in case of a triple effect evaporator will be

> 1

Between 0 and 1

1

< 1

> 1

Between 0 and 1

1

< 1

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Heat Transfer
Vacuum is generally maintained in the vapour space of an evaporator mainly to

Get economical temperature difference by using moderate pressure steam

Facilitate forward feeding in multiple effect evaporation

Achieve very high concentration of the final product

Concentrate heat sensitive materials

Get economical temperature difference by using moderate pressure steam

Facilitate forward feeding in multiple effect evaporation

Achieve very high concentration of the final product

Concentrate heat sensitive materials

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Heat Transfer
In a multiple effect evaporator, the effect of boiling point elevation is to

reduce the capacity

increase the economy

reduce the economy

all of the listed here

reduce the capacity

increase the economy

reduce the economy

all of the listed here

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Heat Transfer
The overall resistance for heat transfer through a series of flat resistance, is the __________ of the resistances.

Average

Sum

Geometric mean

Product

Average

Sum

Geometric mean

Product

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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 overall heat transfer co-efficient for a shell and tube heat exchanger for clean surfaces is U0 = 400 W/m².K. The fouling factor after one year of operation is found to be hd0 = 2000 W/m².K. The overall heat transfer co-efficient at this time is

Heat Transfer Steam economy in case of a triple effect evaporator will be

Heat Transfer Vacuum is generally maintained in the vapour space of an evaporator mainly to

Heat Transfer In a multiple effect evaporator, the effect of boiling point elevation is to

Heat Transfer The overall resistance for heat transfer through a series of flat resistance, is the __________ of the resistances.

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 overall heat transfer co-efficient for a shell and tube heat exchanger for clean surfaces is U0 = 400 W/m².K. The fouling factor after one year of operation is found to be hd0 = 2000 W/m².K. The overall heat transfer co-efficient at this time is

Heat Transfer
Steam economy in case of a triple effect evaporator will be

Heat Transfer
Vacuum is generally maintained in the vapour space of an evaporator mainly to

Heat Transfer
In a multiple effect evaporator, the effect of boiling point elevation is to

Heat Transfer
The overall resistance for heat transfer through a series of flat resistance, is the __________ of the resistances.