process heat transfer slides

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PROCESS HEAT

TRANSFER

TYPES OF HEAT EXCHANGERS

BY:ABHIJIT PANCHMATIYA

(130280105030)



Heat Exchangers• Heat exchangers are one of the most common pieces

of equipment found in all plants.

• Heat Exchangers are components that allow the

transfer of heat from one fluid (liquid or gas) to

another fluid.

•In a heat exchanger there is no direct contact betweenthe two fluids. The heat is transferred from the hot

fluid to the metal isolating the two fluids and then to

the cooler fluid.



Types of Heat Exchangers



Dou!e"P#pe Exchanger



Simplest type has one tube inside another -inner tube may have longitudinal fns onthe outside

However, most have anumber of tubes in the outer

tube can have ver! man!

tubes thus becoming a shell

Dou!e"P#pe Exchanger



She!!"an$"Tue Heat

Exchanger



"hellandTube Heat Exchangers are the most

important t!pe of HE. It is used in almost ever! t!pe of industr!.

This t!pe of heat exchanger consists of a set of

tubes in a container called a shell.

The fluid flowing inside the tubes is called the

tube side fluid and the fluid flowing on the outside

of the tubes is the shell side fluid.

She!!"an$"Tue Heat

Exchanger



So&e co&&on heat"exchanger

ter&s Tube side: Inside the tubes. Shell side: Outside the tubes, between the tubes

and the shell. Tube sheet A thick plate provided with holes

(one per tube) in which the tubes are fixed. Tube bundle Consists of tubes, tube sheet and

baffle plates Shell A cylinder of plate in which the tube bundle

is placed



She!! an$ Tue Heat

Exchangers Construct#on

Fixed Tube-sheet type

U-tube type Floating Head type



Front hea$ type

A-type B-type

B

Channel and removable cover Bonnet (integral cover)

A



She!! type

E-type F shell

E F

One-pass shell Two-pass

shell

Longitudinal baffle



%ore she!! types

and H shells normally only used !or hori"ontal thermosyphonreboilers

# and $ shells i! allo%able pressure drop can not be achieved inan E shell

J

HG

X

Split flow Double split flow

Divided flow Cross flow

Longitudinal

baffles



'o("f#nne$ Tues

Flat end to go into tube sheet andintermediate &at portions !or ba'elocations

Available in variety o! metalsincluding stainless steel( titaniumand inconels



P!ate an$ fra&e

)lates hung vertically andclamped in a press or !rame*

as+ets direct the streamsbet%een alternate plates andprevent external lea+age

)lates made o! stainless steel

or higher ,uality material )lates corrugated to give

points o! support andincrease heat trans!er



P!ate Heat Exchanger



Genera! )#e( of p!ate exchanger

&)lateexchanger' normally re!ersto a gas+eted

plate- and-!rameexchanger



F!o( Arrange&ent (#th#n a PHE

lternate plates (often same plate t!pes inverted)

as*ets

arranged for

each stream to

flow between

alternate plates



A#r"Coo!e$ or F#n"Fan

Exchanger



A#r"coo!e$ exchanger

Air blo%n across fnned tubes !orceddraught type.

/an suc+ air across induced

draught.

+inned tubes



Sp#ra! Heat Exchanger



"piral heat exchangers can be used in most applications in thechemical process industr!

In man! difficult applications where fouling and plugging are

problems, a standard shell and tube design ma! not be

effective $hile a spiral heat exchanger often has a higher initial cost, it

ma! provide a lower life c!cle cost due to lower fouling rates

and ease of maintenance




spiral heat exchanger is composedof two long, flat plates wrappedaround a mandrel or center tube,

creating two concentric spiralchannels In a spiral heat exchanger, the hot

fluid flows into the center of the unitand spirals outward toward the outer

plates while at the same time, the coldfluid enters the peripher! and spiralinward, exiting at the center




T HA 0 1

y o u2

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