Condensing film co-efficient for steam on horizontal tubes ranges from 5000 to 15000 Kcal/hr.m² .°C. Condensation of vapor is carried out inside the tube in a shell and tube heat exchanger, when the

Heat Transfer
Condensing film co-efficient for steam on horizontal tubes ranges from 5000 to 15000 Kcal/hr.m² .°C. Condensation of vapor is carried out inside the tube in a shell and tube heat exchanger, when the

Lower pressure drop through the exchanger is desired

Temperature of the incoming vapor is very high

Higher condensing film co-efficient is desired

Condensate is corrosive in nature

Lower pressure drop through the exchanger is desired

Temperature of the incoming vapor is very high

Higher condensing film co-efficient is desired

Condensate is corrosive in nature

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Heat Transfer
Graetz number is given by

kμ/mCp

mCp/kμ

kL/mCp

mCp/kL

kμ/mCp

mCp/kμ

kL/mCp

mCp/kL

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Heat Transfer
The non-dimensional temperature gradient in a liquid at the wall of a pipe is the

Prandtl number

Heat flux

Nusselt number

Schmidt number

Prandtl number

Heat flux

Nusselt number

Schmidt number

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Heat Transfer
For large heat transfer area requirement, shell and tube heat exchanger is preferred, because it

Occupies smaller space

Is easy to operate and maintain

Is more economical

All of these

Occupies smaller space

Is easy to operate and maintain

Is more economical

All of these

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Heat Transfer
Air is best heated with steam in a heat exchanger of

plate type

double pipe type with fin on air side

double pipe type with fin on steam side

shell and tube type

plate type

double pipe type with fin on air side

double pipe type with fin on steam side

shell and tube type

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Heat Transfer
The film co-efficient is decreased due to the presence of non-condensing gases in the vapors. The film co-efficient of superheated vapor as compared to that of saturated vapor is

Some

More

Either more or less ; depends on the nature of vapor

Less

Some

More

Either more or less ; depends on the nature of vapor

Less

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Heat Transfer

Heat Transfer Condensing film co-efficient for steam on horizontal tubes ranges from 5000 to 15000 Kcal/hr.m² .°C. Condensation of vapor is carried out inside the tube in a shell and tube heat exchanger, when the

Heat Transfer Graetz number is given by

Heat Transfer The non-dimensional temperature gradient in a liquid at the wall of a pipe is the

Heat Transfer For large heat transfer area requirement, shell and tube heat exchanger is preferred, because it

Heat Transfer Air is best heated with steam in a heat exchanger of

Heat Transfer The film co-efficient is decreased due to the presence of non-condensing gases in the vapors. The film co-efficient of superheated vapor as compared to that of saturated vapor is

Heat Transfer
Condensing film co-efficient for steam on horizontal tubes ranges from 5000 to 15000 Kcal/hr.m² .°C. Condensation of vapor is carried out inside the tube in a shell and tube heat exchanger, when the

Heat Transfer
Graetz number is given by

Heat Transfer
The non-dimensional temperature gradient in a liquid at the wall of a pipe is the

Heat Transfer
For large heat transfer area requirement, shell and tube heat exchanger is preferred, because it

Heat Transfer
Air is best heated with steam in a heat exchanger of

Heat Transfer
The film co-efficient is decreased due to the presence of non-condensing gases in the vapors. The film co-efficient of superheated vapor as compared to that of saturated vapor is