Heat transfer co-efficient, hG(Kcal/hr.m² .°C) and mass velocity of air, G (kg/hr.m² ) for air flow parallel to the surface in case of constant drying rate in batch drying is related as hG = 0.0176G0.8. But when the flow of air perpendicular to the surface is encountered, this equation changes to

Process Equipment and Plant Design
Heat transfer co-efficient, hG(Kcal/hr.m² .°C) and mass velocity of air, G (kg/hr.m² ) for air flow parallel to the surface in case of constant drying rate in batch drying is related as hG = 0.0176G0.8. But when the flow of air perpendicular to the surface is encountered, this equation changes to

HG = 1.004G0.37

HG = 0.0176G0.37

1.004G0.8

0.0176G1.37

HG = 1.004G0.37

HG = 0.0176G0.37

1.004G0.8

0.0176G1.37

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Process Equipment and Plant Design
In case of a 'thin' pressure vessel, the ratio of its diameter to wall thickness is

< 10

30

> 20

> 10

< 10

30

> 20

> 10

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Process Equipment and Plant Design
In the design of a shell and tube heat exchanger, the corrosion allowance

All of these

Need not be provided for non-pressure parts like tie rods, spacers, baffles, supports etc

For internal cover and tube sheet is provided on both the sides

For carbon steel and cast iron pressure parts is 1.5 mm (except for tubes) and for severe conditions it is 3 mm

All of these

Need not be provided for non-pressure parts like tie rods, spacers, baffles, supports etc

For internal cover and tube sheet is provided on both the sides

For carbon steel and cast iron pressure parts is 1.5 mm (except for tubes) and for severe conditions it is 3 mm

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Process Equipment and Plant Design
__________ liquor is best handled in a long tube vertical evaporator.

Scaling

Foamy

Salting

Viscous

Scaling

Foamy

Salting

Viscous

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Process Equipment and Plant Design
For laminar flow (NRe < 2100) in steel pipe, the optimum inside pipe diameter is given by

Di, opt = 7.6 Q0.36 . ρ0.9

Di, opt = 3 Q0.36 . ρ1.86 μ0.08

Di, opt = 3 Q0.36 ρ0.18

Di, opt = 3.9 Q0.45 . ρ0.23

Di, opt = 7.6 Q0.36 . ρ0.9

Di, opt = 3 Q0.36 . ρ1.86 μ0.08

Di, opt = 3 Q0.36 ρ0.18

Di, opt = 3.9 Q0.45 . ρ0.23

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Process Equipment and Plant Design
To avoid the tearing off the plate of an edge, the margin (i.e., the minimum distance from the centre of the rivet hole to the nearest edge of the plate) should be equal to

0.5 d

D

1.5 d

2.5 d

0.5 d

D

1.5 d

2.5 d

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Process Equipment and Plant Design

Process Equipment and Plant Design In case of a 'thin' pressure vessel, the ratio of its diameter to wall thickness is

Process Equipment and Plant Design In the design of a shell and tube heat exchanger, the corrosion allowance

Process Equipment and Plant Design __________ liquor is best handled in a long tube vertical evaporator.

Process Equipment and Plant Design For laminar flow (NRe < 2100) in steel pipe, the optimum inside pipe diameter is given by

Process Equipment and Plant Design To avoid the tearing off the plate of an edge, the margin (i.e., the minimum distance from the centre of the rivet hole to the nearest edge of the plate) should be equal to

Process Equipment and Plant Design
In case of a 'thin' pressure vessel, the ratio of its diameter to wall thickness is

Process Equipment and Plant Design
In the design of a shell and tube heat exchanger, the corrosion allowance

Process Equipment and Plant Design
__________ liquor is best handled in a long tube vertical evaporator.

Process Equipment and Plant Design
For laminar flow (NRe < 2100) in steel pipe, the optimum inside pipe diameter is given by

Process Equipment and Plant Design
To avoid the tearing off the plate of an edge, the margin (i.e., the minimum distance from the centre of the rivet hole to the nearest edge of the plate) should be equal to