What Is Double Wall Heat Exchanger – Know In Detail

 A double wall heat exchanger  is a small apparatus providing dual safety
from the heat while transferring the plates, preventing corrosion from
happening. Installing the double-wall plate system means even if there is
damage to one plate, it is detected externally and further damage can be
prevented.

To explain in layman's terms it is a device that exchanges or transfers the
heat from one fluid to another. Because of the different applications, there
are different names of the heat exchangers. When considering what type of
heat exchanger it requires, think about which medium you want to heat or
cool and what you are using it for.
The benefits of installing a double wall heat exchanger include:
 Corrosion resistance
 Low investment cost
 Low operating cost
 Easy maintenance
 Less inspection required
 Less weight
 Reliable and robust

Some of the examples of double-wall heat exchangers

Lube oil cooling

The oil pollutes the cooling medium through lakes, rivers, or seas. This can
further cause severe damage to the environment and if the cooling medium
mixes with the oil. Furthermore, serious damage can be caused to the
equipment being cooled.

Transformer oil cooling

Water-contaminating transformer oil results in severe damage to the
transformer thus it can demand lengthy plant shutdowns.

Quench oil cooling

Water mixing with quench oil can cause a steam explosion.

Chemical processes

Intermixing of process media can create accelerated corrosion, an
explosion, undesirable chemical reactions, or contamination.

Potable water heating

District heating water, glycol, refrigerants and other heat sources used for
heating potable water must not pollute the tap-water system.

In conclusion

The Double-Wall Plate Heat Exchanger  was firstly developed by Alfa Laval
in response to power stations’ problems of how to safeguard the
transformers from the risk of oil and water mixing, in case of heat
exchanger failure.

With the advent of the Double-Wall Heat Exchanger product range, the
company has introduced novel limits of the plate heat exchanger to new
applications. Heat exchange units are designed to suit a range of
requirements, ensuring that you get the very best heat exchanger for your
needs.