DTL Series Heat Exchangers
Reliable Heat Transfer Technology
Thermo Dynamics Limited manufactures an exceptional line of high effectiveness
heat exchangers. These heat exchangers have been installed in numerous
commercial solar water heating and oil-fired boiler systems. The Model
DTL series is the result of many years of research into shell-and-tube
heat exchanger performance.
Tube side flow is split between tubes to reduce the
Shell side flow is directed across the tubes by baffles
and results in significant increases in thermal performance. Cross
flow also reduces fouling.
Shell-and-tube heat exchangers are constructed with
off-the-shelf components making them easy to manufacture and economical.
All copper construction means the heat exchanger is
compatible with existing copper plumbing.
More than one heat exchanger can be used in a parallel
or series arrangement to meet special heat transfer or physical requirements.
High thermal performance, even with fouled heat transfer
Ports and endplates are brazed. End caps are soldered
with 95/5 tin/antimony.
All heat exchangers are pressure tested to 500 kPa
(75 psi) on the shell side and 1000 kPa (150 psi) on the tube side
prior to shipping to ensure leak free operation for the customer.
Low Working Pressure, up to 400 kPa (60 psi) domestic
hot water boiler.
Commercial, swimming pool and domestic solar water
Virtually all low/medium pressure applications where
the fluids and existing plumbing are compatible with copper.
Most of our shell-and-tube heat exchangers can be
used in a thermosiphoning arrangement with forced circulation on the
For small heat transfer loads, 2 to 6 kW (6 to 20 MBtu/h), a coil-in-shell
heat exchanger may be required, especially when a compact heat exchanger
is required. The coil-in-shell is specifically designed for thermsiphon
applications and can often be physically half the size of a shell-and-tube
heat exchanger with equal thermal performance.
Thermo Dynamics manufactures all shell-and-tube heat exchangers
in house and all are engineered and fabricated to strict tolerances. We
pride ourselves on consistent quality control over manufacturing.
A single Thermo Dynamics shell-and-tube heat exchanger is
capable of transferring from 2 to 120 kW (6 to 400 MBtu). More than one
heat exchanger can be used to meet larger heat transfer loads. Nominal
shell diameters are from 2, 3 and 4 inches.
The shell-and-tube heat exchanger features all copper construction. High
pressure heat exchangers or stainless steel construction is available
by special order only.
Copper heat exchangers can be supplied with sweated or threaded ports
for convenient plumbing.
Thermo Dynamics' shell-and-tube heat exchanger has excellent
thermal performance, even with fouled heat transfer fluids.
All shell-and-tube heat exchangers are single pass type.
Tube side flow is split between the tubes to reduce head loss. Shell side
flow is directed across the tubes by baffles. This cross flow generates
high heat transfer coefficients with moderate head loss.
Temperature and Pressure Rating
Recommended shell side working pressures, at 200°F,
are 85, 60 and 60 psi for the 2, 3 and 4 inch shell, respectively. Recommended
working pressure at 200°F for the tubes is 225 psi. Heat exchangers
with higher working pressures are available by special order.
Consult the factory for information on shell-and-tube or
coil-in-shell heat exchangers for thermosiphon applications.
For More Information download the following heat exchanger
sizing guide. The file is in PDF format: Heat
Exchanger Sizing Guide, (135 kB)
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