Soldered

Alfa Laval plate heat exchanger AC70X-90M conn.4xR1 1/4'' solder 22mm

Order No.: 156.4416
Manufacturer number: 3287065806
Manufacturer: Alfa Laval

To previous product 156.4257

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Description

Application
Soldered plate heat exchangers are primarily used as evaporators, condensers and oil coolers. In multi-step systems or complex refrigeration circuits they also excel as desuperheaters, super-coolers and economiser. Plate heat exchangers can also be used in reversible refrigeration ...

Application
Soldered plate heat exchangers are primarily used as evaporators, condensers and oil coolers. In multi-step systems or complex refrigeration circuits they also excel as desuperheaters, super-coolers and economiser. Plate heat exchangers can also be used in reversible refrigeration circuits as well as in indirect systems. This wide range of possible applications means that different heat exchanger versions are needed.

Structure
The stainless steel plates are soldered, thus avoiding the need to use seals and large frame. The solder creates a connection between contact points on the plates and seals the package. Soldered Alfa Laval plate heat exchangers are soldered at all contact points to ensure optimal heat transfer and high pressure resistance. The heat exchangers are designed for a long service life. By using almost all of the material for heat transfer, the soldered plate heat exchanger is very compact and lightweight with minimal refrigerant content. Alfa Laval is able to produce custom equipment for specific customer requirements.

Materials
The heat exchangers are manufactured in accordance with the European Pressure Equipment Directive 2014/68/EU. The soldered plate heat exchangers consist of a package of copper and stainless steel 1.4401 plates and connections made from 1.4404. The package is vacuum soldered with copper solder (99.9%).

Function
Soldered plate heat exchangers are generally used in reverse flow refrigeration application in order to achieve maximum heat transfer. All connections are located on one side of the equipment without the need for any special connections being created, thus ensuring simple installation.

Function of the evaporator
The channels produced by the profiles plates are arranged such that flow is the opposite direction to the medium (counter flow principle). The two-phase refrigerant (vapour and liquid) enter the heat exchange at the bottom left. The proportion of gas depends on the operating conditions of the refrigeration system. The liquid evaporates in the channels before the vapours are then superheated (dry evaporation). The refrigerant connections are labelled as S3/S4 in the diagram. The water (brine) flows in the opposite direction in the next channel. The water (brine) connections are labelled as S1/S2.

Function of the condenser
The design is the same as the evaporator.  Hot gas enters the device at the top left. It condenses on the surface of the channels until fully liquified and is then slightly subcooled. This process is known as “free condensation”. The refrigerant connections are labelled as S3/S4 in the diagram. The water (brine) flows in the opposite direction in the next channel. The water (brine) connections are labelled as S1/S2.

X-distributor and Equalancer SystemTM
The distribution systems developed by Alfa Laval ensure excellent cooling performance figures, stable control and good oil return. The two-phase mixture is mixed together by the patented “X” distribution system as it enters the evaporator. This stabilises the flow and increases performance.

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Accessories / Replacement parts

  • Armaflex insulation
    Alfa Laval Armaflex insulation Type P f.CB60-90H/AC70X-90M
    Order No.: 156.4887

Technical data

Dimensions
Width
111 mm
Height
526 mm
Depth
217 mm
General information
Number of plates
90 pcs
Type
AC70X-90M/6
Pressure
Pressure drop
R404A:
Bei Verflüssigungstemperatur 45°C: 296 kPa
 
Bei 12°C Wassereintritts- und 7°C Wasseraustrittstemperatur: 0,49 bar (lt.Erläuterung 1)
 
R134a:
Bei Verflüssigungstemperatur 45°C: 211 kPa
 
Bei 12°C Wassereintritts- und 7°C Wasseraustrittstemperatur: 0,35 bar (lt.Erläuterung 1)
max. operating pressure
32/32 bar
primary side / secondary side
S1-S2 / S3-S4
Surfaces
Surface
4,59 m²
Weight
Weight net
17,8 kg
Performance data
Nominal capacity
71 kW / 59 kW
 
R404A / R134a (lt.Erläuterung 1)
 
194 kW / 240 kW / 298 kW
 
R404A / R134a / R407C (lt.Erläuterung 2)
Wasservolumenstrom
12160 l/h / 10100 l/h
 
R404A / R134a
 
(lt.Erläuterung 1)
 
8340 l/h / 10320 l/h / 12810 l/h
 
R404A / R134a / R407C
 
(lt.Erläuterung 2)
Pipe connections
Refrigeration medium S3/S4
22,1i / 35,1i mm
Cooling medium (T1/T2)
R 11⁄4" Inch
Cooling medium S1/S2
R 11⁄4" Inch
Pipe connection
6
Temperature data
Operating temperature (min. - max.)
-196/+150 °C
Volume
Refrigeration medium
4,18 l
Cooling medium
4,28 l
Technical modifications reserved. Product images may differ from the actual product and are meant for demonstration purposes only. Absolutely no liability can be assumed for possible indication errors and errors in the manufacturers’ information.
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