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AlfaDisc for refrigeration applications

AlfaDisc for refrigeration applications
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AlfaDisc for refrigeration applications - 1

AlfaDisc An all-welded Plate Heat Exchanger for Refrigeration 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 c haracteristics 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 diverters. On the plate side, water or brine 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. Throat of Plate * Fluid is forced through this section on the shell side Throat of Plate * Fluid leaves through the same area Flow diverter The plate pack is resistant to thermal expansion and damage from freezing due to the “accordion” core construction.

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AlfaDisc for refrigeration applications - 2

System Applications AlfaDisc is designed for natural refrigerants or HFCs for industrial and commercial refrigeration system applications. desuperh eater Natural flooded evaporator flooded evaporation Flooded evaporator with pumped refrigerant feed other refrigerants Water/glycol cooled flooded evaporation heater for heat recovery

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AlfaDisc for refrigeration applications - 3

Advantages of AlfaDisc compared to shell-and-tube heat exchangers + Less than half the size for comparable duties as a result of higher heat transfer coefficient. + Turbulent flow even at low velocities enables stable capacity regulation and minimizes fouling. + Easy adaptation to each cooling duty by grouping plates in pure co-current or counter-current flow and by using multiple passes when required. + Thermal and hydraulic performances can be optimised trought different plate pattern + Can handle small approach temperatures for highly efficient overall plant performance. Model range...

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AlfaDisc for refrigeration applications - 4

L min/max L' min/max C hs1 min/max hb2 min/max ht2 min/max Plate Shell side side H2 min/max L min/max L' min/max C hs1 min/max hb2 min/max ht2 min/max Plate Shell side side 1 Dimensions vary with support type 2 Dimensions vary with connection sizes and supports Available connection standards Welding neck/raised face Other connection executions available on request Alfa Laval reserves the right to change specifications without prior notification. How to contact Alfa Laval Up-to-date Alfa Laval contact always available on our website

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