Aluminum microchannel heat exchanger - Microchannel coil

Technical information Chillers MicroChannel Heat Exchanger -Construction

Microchannel Heat Exchanger-Construction

The picture on the right shows the basic structure of Microchannel heat exchanger. The current design depends on the particular application.

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MicroChannel capacitor, is often designed with a lot of passes (parallel threads) with fewer pipes in each successive pass. Accidentally connecting the discharge pipe to the outlet header of the MCHE, the result will be the excessive refrigerant-side pressure loss and poor heat transfer.

The inlet and outlet tubes are intended only for connection and support their own weight. They, unfortunately, locate where the processes would be, and often look like pens. Never lift in the MCHE, the inlet and outlet pipes. Installation

  • MicroChannel heat exchanger must be running at least some of flexible brackets, so that the movement is possible without causing unnecessary stress/strain heat exchanger or its compounds.
  • Preferably, the mounting brackets in the MCHE, the only apply to rubber or plastic bushings, washers, bumpers and others Direct contact with metal clasps and/or frames may as a result of electrochemical corrosion, if action is not taken to prevent it, for example.

    careful selection of alloy, paints and coatings and other
  • To meet the specific requirements of different methods of installation.

Inlet/outlet connections

  • Inlet/outlet connections should be designed so that the stress from thermal expansion may not be transferred tube.
  • Inlet/outlet connections, should be maintained /designed soldered joints are not prone to stress/tension.
  • To avoid damage to or destruction of thin-walled aluminum inlet/outlet pipe, mating pipes must be pre-bent /prepared so tall/forcing needed during the installation.
  • When copper and aluminum tubes are joined together, galvanic corrosion of aluminium may result. To prevent this connection is protected with a paint, resin or plastic heat-shrink tubing.

For the protection of Cu-Al solder and heat shrink tubing, tube length after a joint on the inlet/outlet pipe must be longer than 70 mm. When soldering coil in your system, additional protection may be obtained by dry nitrogen purging and/or packaging of copper pipe with a wet cloth. Aluminium inlet/outlet pipe to the MCHE, must also be at least 70 mm long to protect the tube-header soldering joint.


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