A piece of equipment built for

efficient heat transfer from one

medium to another.

A heat exchanger is a piece of equipment

built for efficient heat transfer from one

medium to another.

They are widely used in space heating,

refrigeration, air conditioning, power plants,

chemical plants, petrochemical plants,

petroleum refineries, natural gas processing

and sewage treatment.

In parallel-flow heat exchangers,

the two fluids enter the exchanger

at the same end, and travel in

parallel to one another to the

other side.

In counter-flow heat exchangers

the fluids enter the exchanger from

opposite ends. The counter current

design is the most efficient.

In a cross-flow heat exchanger,

the fluids travel roughly

perpendicular to one another

through the exchanger.

Double pipe heat exchanger

Shell and tube heat exchanger

Plate heat exchanger

Plate and shell heat exchanger

Adiabatic wheel heat exchanger

Plate fin heat exchanger

Pillow plate heat exchanger

Fluid heat exchangers

Waste heat recovery units

Dynamic scraped surface heat exchanger

Direct contact heat exchangers

HVAC air coils

Spiral heat exchangers

Double pipe heat exchanger

Shell and tube heat exchanger

Plate heat exchanger

Plate and shell heat exchanger

Adiabatic wheel heat exchanger

Plate fin heat exchanger

Pillow plate heat exchanger

Fluid heat exchangers

Waste heat recovery units

Dynamic scraped surface heat exchanger

Direct contact heat exchangers

HVAC air coils

Spiral heat exchangers

It is also known as concentric tube heat exchanger

In this heat exchanger the fluid to be cooled or

heated passes through the tube 2(green) and the

other fluid is passed through tube 1 (red)to absorb or

release the heat.

Advantages: Cheap for both design and maintenance.

Disadvantages: Low efficiency and requires large

space.

Pasteurization

Digester heating

Heat recovery

Pre-heating

Effluent cooling.

One set of these tubes contains the fluid that must be

either heated or cooled. The second fluid runs over the

tubes that are being heated or cooled so that it can

either provide the heat or absorb the heat required.

They are typically used for high pressure

applications.(above 30 bars)

Cooling of hydraulic fluid.

Cooling of engine oils.

Cool or heat swimming pool water or charged

air.

It is composed of multiple, thin, slightly separated plates that have very large surface areas and fluid flow passages for heat transfer.

The plates are often spaced by rubber sealing gaskets which are cemented into a section around the edge of the plates. The plates are pressed to form troughs at right angles to the direction of flow of the liquid which runs through the channels in the heat exchanger. These troughs are arranged so that they interlink with the other plates which forms the channel with gaps of 1.3–1.5 mm between the plates.

The plates can be replaced after getting

corroded.

If the temperature difference to be

accquired is to be increased then it can be

done by adding more plates.

Water heaters

Cooling tower isolation

Free cooling

Waste heat recovery

Heat pump isolation

Thermal (ice) storage systems

A spiral heat exchanger (SHE), may refer to

a helical (coiled) tube configuration

Efficient use of space.

They can be easily cleaned.

A Spiral Heat Exchangers (or SHE) is a coiled tube

arrangement, with two channels coiled one around

the another. These two channels operate in a

counter-flow arrangement, offering excellent turn

down ratios, while optimising flow patterns which in

turn, enhance heat transfer.

Pasteurization

Recuperators (Exhaust and Air Handling

Systems)

Sludge Treatment (Thermal

depolymerisation)

Cost

High/low pressure limits

Thermal performance

Temperature ranges

Product mix (liquid/liquid, particulates or high-solids liquid)

Pressure drops across the exchanger

Fluid flow capacity

Cleanability, maintenance and repair

Materials required for construction

Ability and ease of future expansion

Plate heat exchangers must be disassembled and cleaned

periodically. Tubular heat exchangers can be cleaned by

such methods as acid cleaning, sand blasting, high-

pressure water jet, bullet cleaning, or drill rods.

In large-scale cooling water systems for heat

exchangers, water treatment such as purification, addition

of chemicals, and testing, is used to minimize fouling of

the heat exchange equipment. Other water treatment is

also used in steam systems for power plants, etc. to

minimize fouling and corrosion of the heat exchange and

other equipment.

Presented By:-

Devidas Barge

Pratik Dalvi

Gopesh Chilveri

Aniket Dupade