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Cary Miller
Email: Cary.Miller@chart-ind.com
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Heat Exchangers

BAHX
Core-In-Kettle
Welded Plate Heat Exchangers
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Design

Chart Energy & Chemicals' heat exchangers owe their inherent versatility and high-performance characteristics to the advanced design technology and construction of the plate-fin matrix.

Individually constructed in aluminum, each heat exchanger is built by stacking layers of corrugated fins separated by parting sheets and sealed along the edges with side bars.

The matrix assembly is brazed in a vacuum furnace to form an integral, rigid heat exchanger block. Headers and supports welded onto the brazed matrix complete the unit.

Process Design

Chart Energy & Chemicals has developed a comprehensive range of heat transfer fins with a proven design for every application. Design variations in the configuration of the heat exchanger matrix can accommodate an almost unlimited range of flow options, including counterflow, crossflow, parallel flow, multi-pass and multi-stream formats.

Chart E&C's process engineers have a wealth of experience and test data to use in selecting the most appropriate heat transfer fin for the customer’s individual requirements.

The herringbone and serrated fins provide the greatest surface area and the highest heat transfer performance. They are particularly suitable for applications involving close temperature approaches. Where there are critical pressure drop requirements, the plain and perforated fins can be used.


Plain heat transfer fins Perforated heat transfer fin Herringbone heat transfer fin Serrated heat transfer fin
PLAIN
A sheet of metal with corrugated fins at right angles to the plates.

PERFORATED
A plain fin constructed from perforated material.

HERRINGBONE
Made by displacing the fins sideways at regular intervals to produce a zig-zag effect.
SERRATED
Made by simultaneously folding and cutting alternative sections of fins. These fins are also known as the lanced or multi-entry pattern.

Chart E&C process engineers are able to enhance standard flow patterns, i.e. crossflow and counterflow, into more compact configurations.

Flow pattern diagram for Chart Heat ExchangersA simple crossflow layout is generally suitable for low to moderate duties. It is used extensively for gas / liquid applications and is especially effective when handling a low-pressure gas stream on one side of the heat exchanger. For heavier duty tasks, where the mean effective temperature difference in crossflow may be significantly reduced, the compact counterflow pattern frequently offers an efficient solution.

The higher levels of efficiency achieved by counterflow units are essential to most low-temperature applications. Headering arrangements must, of course, be matched to the customer’s process requirements.

Mechanical Design

On both sides of the Atlantic, Chart Energy & Chemical's engineering teams combine a wealth of experience with the latest state-of-the-art engineering and design programs. Together they provide an industry-leading design capability that has the range and flexibility to meet specific customer needs anywhere in the world.

Research and development programs are dedicated to the goal of enhancing international "best practice" procedures. Whatever the location, customers benefit from a design philosophy shaping the future of advanced plate-fin heat exchanger applications.

Design Codes

Backed with more than 50 years' hands-on experience with multi-national pressure vessel codes and inspection regulations, Chart Energy & Chemicals has gained world-wide recognition for its expertise in all aspects of plate-fin heat exchanger technology.

Advanced PC-based procedures for thermal, hydraulic and mechanical design add a new dimension to an already established world class product and for any international requirement.

Chart E&C's heat exchangers are designed primarily according to ASME VIII code requirements and marked with the “U” compliance stamp. Nevertheless, Chart Energy & Chemicals is fully conversant with a multitude of international code requirements ensuring a truly global reach.

 

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