- #Alfa laval heat exchanger selection manuals
- #Alfa laval heat exchanger selection upgrade
- #Alfa laval heat exchanger selection code
For detailed information about flow direction see the name plate. Make sure that the heat exchanger is installed correctly according to the current flow direction for the heat exchanger. Flow direction of a single circuit heat exchanger is normally parallel, while on dual circuit heat exchanger could be diagonal or parallel. The heat exchanger could be of single or dual circuit type. In applications where a phase change of media occurs, the heat exchanger must be installed vertically.
Normally the plate heat exchanger is connected so that the media flows through the plate heat exchanger in opposite directions (in counter-current flow) and in most cases this provides the best heat transfer performance. The installation must be installed with equipment that protects it against pressures and temperatures outside the approved minimum and maximum values shown on the name plate. The piping must be well supported so that no loads are transferred to the heat exchanger during operation. Plate heat exchangers with large plate packs may be difficult to lift without lifting lugs because the centre of gravity may cause the plate heat exchanger lean too much. Name plate differs depending on the type of pressure vessel approval. The name plate is fixed to the cover plate (usually on the same side as the connections).
#Alfa laval heat exchanger selection code
The unit type, manufacturing number and year along with the pressure vessel details in accordance with applicable pressure vessel code can be found on the name plate.
#Alfa laval heat exchanger selection manuals
You find manuals and 3D drawings for Alfa Laval heat exchangers on the Productguide.
#Alfa laval heat exchanger selection upgrade
When Alfa Laval releases new models we secure that the c-c measurements between the connections are the same for the new models as the old to secure easy upgrade to the new model. Note that maximum design temperature and maximum design pressure are dependent on each other.Īlfa Laval’s range includes all sizes, NTU and ports ranging from 15 mm to 120 mm different channel plates, asymmetric plates and different pressure range to secure we have a perfect fit for all kind of duties.Īll Alfa Laval brazed plate heat exchangers can be offered with different connections to make the installation at the customer site easy. Example: CB30-14H: CB = product family, Standard pressure = no letter, 30 = Capacity, 14 = Number of plates, H = Channel typeĪlfa Laval’s product range of brazed plate heat exchangers covers temperatures of maximum 225 degree Celsius.The name is constructed as follows: Product family, Pressure, Capacity, Number of plates, Channel type Every brazed heat exchanger has a name, the name tells us information about the heat exchanger. Selecting the correct plate patterns for each plate size means optimal function for any application. The dark and light red arrows show where the refrigerant connections are.Alfa Laval brazed plate heat exchangers can be configured as one-, two- or multi-pass versions with a wide range of connection designs and locations. The refrigerant flows counter-currently in the opposite channel and is cooled. The dark and light blue arrows show the location of the brine connections. Once fully condensed, it is then subcooled slightly, in a process called "free condensation". The refrigerant enters at the top left as a hot gas and starts to condense on the surface of the channels. When used as a condenser, the main components are still the same as for the evaporator. The water (brine) to be cooled flows counter-currently in the opposite channel the dark and light red arrows show where the water (brine) connections are. The dark blue and light blue arrows show the location of the refrigerant connections. Some degree of superheating is always required – hence the process being called "dry expansion". Dry expansionĮvaporation of the liquid phase takes place inside the channels. The vapour quality depends on operating conditions in the refrigeration plant. The two-phase refrigerant (vapour + liquid) enters at the bottom left of the unit. When used as an evaporator, the channels formed between the corrugated plates and corners are arranged so the two media flow through alternate channels, always in opposite directions (counter-current flow). Brazed plate heat exchangers used for HVAC applications normally use a parallel flow to achieve the most efficient heat transfer. In a single-pass design, all the connections are located on one side of the heat exchanger, making installation very easy.