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Polar lamella heat exchangers are used in refrigeration and air-conditioning technology to cool down or heat up gaseous matter, room air in particular. They find many an application in the field of food refrigeration – in cold rooms or refrigerated display units, for example – and also in the field of heating, ventilating, heat recovery systems and heat pumps. Thanks to careful materials selection and construction processes, our heat exchangers optimally meet all the various requirements in terms of capacity, dimensioning, reliability and functionality.
Lamellas
To stabilize and enlarge the surface, the lamellas are given a slight V-shape. The deep-drawn lamella necks serve to transfer the heat to the pipe and to keep a distance to the adjacent lamella.
Material: Aluminium, alu-epoxy, AIMg3 and copper
Lamellar geometry
Defined by pipe configuration and diameter, the choice of lamellar geometry depends on the type of application and of the specifications regarding capacity, dimensions and pressure losses.
Heat exchanger pipe
To achieve optimum heat transfer, the heat exchanger pipe is subject to mechanical expansion in the lamella necks until the point of press fit. Inner finned pipes can be used to increase the heat exchanger capacity.
Material: Copper, tinned copper and stainless steel
Frame
Construction is carried out to customer specifications for appliance installation, for conduit installation or as a complete housing.
Material: Aluminium, AIMg3, copper, galvanized steel and stainless steel
Connections
- Refrigerant operation
The refrigerant distributor is made of brass, the manifold of copper with soldered connections - Water operation
The distribution pipes and manifolds are made of copper with soldered vents, threaded nipples (steel or red brass) or flange, bleed valves, ¼“-discharge.
Material: Copper, galvanized steel and stainless steel
Carrier media
The heat exchangers are suitable for R-security refrigerant, water and brine mixtures under due consideration of material compatibility
Corrosion protection
In cases of deployment in slightly corrosive atmospheres, the following degrees of protection can be supplied:
- Tin-plated copper pipe
The heat exchanger pipe is protected by a layer of tin, the solder points are varnished. - Precoated lamellas (gold varnish or similar).
The lamellas are made of precoated aluminium strip, the heat exchanger pipe of copper or tin-plated copper. - Powder coating
Heat exchanger completely powder-coated
(RAL 7035/RAL 9005) - Nano-tech coating
Thanks to the creation of a dirt-repellant surface, residue formation on the lamella surface is minimized while cleanability and condensate drain factors are improved. - Stainless steel
Heat exchanger pipe made of stainless steel, lamellas of precoated aluminium strip
(gold varnish or similar).
Standard operational limits
- Refrigerant operation Permissible PS pressure 25 bar, temperature 110 °C
- Water operation Permissible PS pressure 16 bar, temperature 110 °C
Pressure test/leak test
Testing as per directive 97/23 EC with dry air under water
Dryness and cleanness
Cleanness for heat exchangers with refrigerant operation according to DIN 8964-3:2000.
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Broshure Lamellar heat exchangers