CADEA
CCoil_Promo CCoil_ModelB CCoil_ModelC CCoil_ModelDX CCoil_ModelEX

Our tank-heating solution

For over 30 years, we have strived to provide more efficient tank-heating designs.

Columbus'Coil is a concept that redefines our views on tank heating and cargo tank heating specifically. By utilizing the vast capabilities of modern computing means, we have finally been able to prove the concept and offer Columbus'Coil, a line of brand new, more efficient tank-heating coil designs.

Columbus'Coil features:

  • A clean and compact design that simplifies equipment transportation and installation;
  • A significantly reduced installation works and lower associated impact of the weldings on the tank and double-bottom coatings;
  • A small footprint that makes the majority of the bottom of the tank free of any tank-heating equipment, providing simplified and improved tank cleaning and maintenance; and
  • Substantially improved heating efficiency that reduces the required heating coil area significantly.

How does it work?

In a nutshell, the working principle is simply determined by the position of the heating coils within the tank.

Contrary to traditional designs, in which the heating coils are uniformly extended over the bottom of the tank, Columbus'Coils are concentrated in the narrow area in the middle of the bottom of the tank, slightly asymmetrically positioned between the tank's inner and outer walls. In addition, the coils are vertically arranged, in a multitude of heating tube levels, making it a compact and convenient heating structure.

Arranged in that way, Columbus'Coils are characterized by the following features:

  • They generate a large-scale heated fluid circulation about an axis parallel to the straight tubes' longitudinal axes;
  • They enable a nearly horizontal cross-flow of the heated fluid through a void space surrounding the heating tubes; and
  • They provide a more effective heat transfer mechanism by superimposing the large-scale circulation-driven forced convection on the buoyancy-driven natural convection.

Tank_Conventional
Conventional_Flow
Conventional heating coil arrangement

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Tank_CCoilB
CCoil_Flow
Arrangement by using Columbus'Coils

Simulation results



Models

Our flagship Columbus'Coil Model B conveniently combines the most important features of a new tank-heating concept: a small form factor, simplicity, favorable thermal efficiency, and ease of installation, cleaning, and maintenance.


ModelB
Tank_CCoilB2
Columbus'Coil Model B


Columbus'Coil Model C extends new tank-heating concept features to the limits.


ModelC
Tank_CCoilC
Columbus'Coil Model C


When the height of the heating coil bundle is a concern, Columbus'Coil Model DX conveniently combines the favorable features of the conventional and new tank-heating designs.


ModelDX
Tank_CCoilDX
Columbus'Coil Model DX


Columbus'Coil Model EX shares the benefits of the Model DX design, further extending its efficiency and the consequential saving of the required heating coil area.


ModelEX
Tank_CCoilEX
Columbus'Coil Model EX


Further arrangements, all based on the basic Columbus'Coil concept, are also possible.


Patent application

The process of protecting the Columbus'Coil patent has been initiated by submitting a PCT application. More information may be found in the records of the World Intellectual Property Organization (WIPO):


Selected papers




A note on the numerical results

All the numerical results provided herein are based on computational fluid dynamics (CFD) simulations performed by using the same standard set of input data, comprising:

  • A residual fuel oil with a 991 kg/m3 nominal density, 585 mm2/s (585 cSt) nominal kinematic viscosity, and 55°C temperature;
  • 50A steel heating coils fed by an 8 bar (abs.) steam; and
  • Environmental conditions comprising 2°C air temperature and 5°C sea temperature.

In addition, the provided numerical comparisons are based on the conventional heating coil arrangement defined above.