 Shell
and Coil Heat Exchangers
The shell and coil heat exchangers are constructed using
circular layers of helically corrugated tubes placed inside each
other. The fluid in each layer flows in the opposite direction to
the layer surrounding it, producing a criss-cross pattern. The large
number of closely packed tubes creates a significant heat transfer
surface within a light compact shell.
The alternate layers create a swift uniform heating of fluids increasing
the total heat transfer coefficient. The corrugated tubes produce
a turbulent flow where the desired feature of fluctuating velocities
is achieved. This haphazard movement of fluid particles reduces
deposit buildup by performing a "scoop and lift" action. The connection
locations and angle of entry is specially selected to reduce the
probability of debris buildup.
Construction Features
The shell and coil tube series are manufactured as a singe unit
with no removable parts. The coiled tube bundles are welded to a
compact tube sheet located within the entry and exit connections.
The cylindrical shell is terminated by hemi-spherical heads. Design
variations include smooth or grooved tubes, angled or 90 connections
in flanged or NPT termination, and 316L stainless or titanium components.
 Advantages
of Shell and Coil Design
High Efficiency: The large number of tightly packed tubes
increases the heat transfer area providing a high heat transfer
coefficient.
Low Installation Costs: Because of its compact size. lightweight
and unique vertical shape, the shell and coil heat exchanger takes
up less space and will cost less to install.
Flexible Designs : With many model types and configurations,
the shell and coil heat exchanger can be used with a wide range
pressures, temperatures and flows.
Low Maintenance: The helically corrugated tubes promote
turbulent fluid flow reducing the amount of scale buildup and fouling.
Can be easily removed from piping system and flushed if necessary.
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