Nandini Heat Exchangers

One of our
most sought after product is the Tube
Heat Exchanger that we manufacture from most superior quality raw materials
and components procured from trustworthy vendors. These heat exchangers consist
of a series of tubes and are perfect for high pressure applications including pressures greater than 30
bar and temperatures greater than 260A C. Our offered Tube Heat Exchanger is available for clients at pocket friendly
price range.

Features

• Good design
• High quality
• Durable

Heat Exchanger
A Shell and Tube Heat Exchanger

Shell
and tube heat exchangers consist of a series of tubes. 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. A set
of tubes is called the tube bundle and can be made up of several types
of tubes : Plain, longitudinally finned etc. Shell and tube heat
exchangers are typically used for high pressure applications with
pressures greater than 30 bar and temperatures greater than 260A C. This
is because the shell and tube heat exchangers are robust due to their
shape.

There
are several thermal design features that are to be taken into account
when designing the tubes in the shell and tube heat exchangers. These
include:

Tube Diameter :
Using
a small tube diameter makes the heat exchanger both economical and
compact. However it is more likely for the heat exchanger to foul up
faster and the small size makes mechanical cleaning of the fouling
difficult. To prevail over the fouling and cleaning problems, larger
tube diameters can be used. Thus to determine the tube diameter, the
available space, cost and the fouling nature of the fluids must be
considered.

Tube Thickness :

• The thickness of the wall of the tubes is usually determined to ensure.
• Ability
  to easily stock spare parts cost sometimes the wall thickness is
  determined by the maximum pressure differential across the wall

Tube Length :
Heat
exchangers are usually cheaper when they have a smaller shell diameter
and a long tube length. Thus typically there is an aim to make the heat
exchanger as long as possible. However there are many limitations for
this including the space available at the site where it is going to be
used and the need to ensure that ther are tubes available in lengths t
hat are twice the required length so that the tubes can be withdrawn
and replace. Also it has to be remembered that long thin tubes are
difficult to take out and replace.

Tube Pitch :
When
designing the tubes, it is practical to ensure that the tube pitch i.e
the centre-centre distance of adjoining tubes is not less than 1.25
times the tubes outside diameter.