AlfaDisc - An all-welded heat exchanger for refrigeration - Alfa Laval - #1

Text version of the page

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.