Reefer containers

Microchannel coils for trailer and reefer container applications

Recently, Kaltra developed special series of microchannel condenser coils tailored for the most challenging refrigeration applications in reliability – refrigerated containers and trailers.

Aluminum alloys, surface treatments and thickness of tube walls of these coils have all been specially sourced for application to contribute to system reliability and extended lifespan.

Optionally available e-coating, an immersion paint process that uses electrical current to deposit paint particles to a coil surface, provides microchannel coils with a durable, lasting finish that will stand up to outdoor environments and makes them last longer.

Unique reinforcing elements were developed for higher coil robustness. The use of multiport tubes of reduced widths (12, 16, and 20mm) contributes to significantly less internal volume of the coil and easier coil bending.

Condenser coils are optimized for use with the most popular refrigerants in the reefer industry, including reduced-GWP R513a, R1234yf, and R290 with GWP value of as low as 3.

In sum, the new series of microchannel condensers appears to have considerable merit for reefer container and trailer applications, namely:

  • Immune to galvanic corrosion
  • Offer long service life, particularly in polluted or marine environments
  • Significantly compacter than coils of other types of the same capacity
  • Perfectly suitable for bending
  • Low internal volume reduces system refrigerant charge
  • Lightweight
  • Simpler to clean
  • Easily recyclable

For operators, these advantages translate to increase energy and operational efficiency and improved environmental sustainability and system reliability for greater uptime, thus reducing the lifetime cost of ownership.

Headquartered in Germany and Austria, Kaltra designs, develops, and manufactures air conditioning and refrigeration equipment and systems. The company offers air-cooled, water-cooled, and free cooling chillersprecision air conditionersIT cooling systems, including room-, rack- and row-based solutions, and energy management solutions. It also designs and manufactures air-cooled condensersdry coolers, and cooling units for special applications. Additionally, Kaltra offers microchannel heat exchangers for condenser, evaporator, and water cooling and heating applications, as well as aluminium coils for small cooling applications. All Kaltra products are engineered with the clear objective of improving energy efficiency and reducing total cost of ownership.

For more information on Kaltra and its products call +49 (0) 911 253 421 07 or visit