The spiral heat exchanger

a solution for a wide range of applications

The concept of a spiral heat exchanger is as simple as it is sophisticated. Two or four long metal strips, onto which spacer studs are welded, are wound around a core, thus creating two or four equally spaced single-passage channels.

The concentric shape of the flow-passages and the studs yield turbulence at low Reynolds numbers. By optimising the flow pattern, heat transfer is enhanced, whilst fouling is reduced. This yields a compact and space-saving construction that can be readily integrated in any plant and reduces installation costs.

Because of the all-welded and robust design, and the low fouling properties, maintenance costs are reduced to a minimum. From the viewpoint of Total Cost of Ownership, the spiral heat exchanger is frequently the most cost-effective solution.

Tailored to the requirements

As the channel geometry can be varied with great flexibility, a spiral heat exchanger can be adapted ideally to the existing requirements and desires. Notwithstanding varying mass flows and desired temperature differences, a spiral heat exchanger often enables heat transfer in a single unit and offers an excellent turn-down ratio. The long single-flow passage channels offer almost any desirable thermal length by which difficult process flows can be heated or cooled in a single device, while avoiding any sharp turns of flow that so often cause blockages.

HES have developed a wide range of cores, each of which is tailored to accomplish specific tasks, which enables us to choose the right solution for any application.

An important feature of our design is the use of continuous strips from core to shell that enables internal and almost unreachable welding seams to be avoided entirely.

The execution of a unit can be chosen freely to our, or to the Rosenblad design, which enables us to offer replacements units for all applications without the need of costly piping adjustments.