The design of spiral tube heat exchangers consists of many tubes arranged in multiple layers of helical coils, around a center pipe. This tube bundle is enclosed in a cylindrical pressure vessel. The fluid on the tube side and on the shell side flows in opposite directions, making the equipment a true countercurrent heat exchanger.

 

Compact Design

Only one exchanger can replace multiple horizontal or vertical exchangers, saving on installation and capital cost for both new units or revamping projects.Compared to traditional shell ＆ tube exchanger, STHE has smaller volume and weight due to its high heat transfer efficiency.

On the Tube Side

The helix-pattern flow in the tubes creates, thanks to the centrifugal forces, a secondary flow consisting of a pair of vortices enhancing the heat transfer coefficient at the peripheral of the tubes.Spiral tubes are coiled layer by layer in opposite direction to have a homogeneous heat transfer all along the exchanger.