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AlfaDisc - An all-welded heat exchanger for refrigeration0 pages
AlfaDisc
An all-welded Plate Heat Exchanger for Refrigeration
Flow Restrictor
Flow pattern as a condenser
Fluid is forced through the throat of
the plate on the shell side.
The plate pack is resistant to thermal expansion
and damage from freezing due to the “accordion”
core construction.
AlfaDisc is a compact, welded heat exchanger for refrigeration
applications including two-phase and single-phase liquid/gas
cooling. It is manufactured for a wide range of duties making it
applicable for low and high temperatures (over 200°C/400°F)
as well as high pressures (100b/ASME 680 psi). These characteristics
make the AlfaDisc a perfect fit with natural refrigerants
like ammonia and carbon dioxide.
AlfaDisc provides the thermal efficiency and the compactness
of a plate-and-frame heat exchanger while handling temperatures
and pressures otherwise requiring shell-and-tube units.
It has a high tolerance for thermal expansion compared to
other welded technologies.
The plate and the shell modules can be constructed of different
materials selected to withstand corrosive fluids and to satisfy
demands for process fluids in high and low temperature
applications.
How it works
AlfaDisc is constructed of a shell and a plate pack with alternating
channels for pure co-current or counter-current flows.
The refrigerant typically condenses or evaporates on the shell
side where the two-phase flow is assisted by flow restrictors.
On the plate side, water or bines are normally pumped through
the welded channels. In some applications, for example
cascade systems, phase change can occur on both the plate
side and the shell side.
