Kubota Materials Canada Corporation

Kubota Materials is a World-Class Foundry and Metals and Fabricator and Leading Supplier of High Quality Alloy-Steel Castings and Assemblies

MERT (Mixing Element Radiant Tube)

Kubota has proven over the years that intensive research and development, a rigorous quality system, and high internal standards have made us the leader in radiant coil supply for the ethylene industry. Now Kubota has added an extra dimension to the process by using a “mixing element”. The element in MERT promotes turbulent flow, breaking the boundary film that forms on bare tubes allowing better mixing of the fluids inside.

In 1996, Kubota installed the first MERT tubes in a commercial ethylene cracking furnace. Since then MERT has been applied to over 750 furnaces world-wide.

Heat transfer in smooth bored tubes is determined by a combination of radiation, conduction and convection. In a straight run of smooth bored tubes, laminar flow develops along the ID surface, creating an insulating boundary layer. This boundary layer is responsible for short run times, increased TMT’s (i.e. Tube Metal Temperature), coking and firing rates.

Kubota’s patented MERT technology allows the laminar layer to be periodically broken up, mixing promotes a more uniform temperature distribution in the fluid cross section. Better mixing and heat transfer can increase conversion through higher firing rates, increased throughput, and provide more efficient heating.

For more information regarding MERT, you can view the product catalog by clicking here.

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