Category: BAFFLE

This webinar examines different types of baffles (TEMA and non-TEMA) and demonstrates how different baffles affect heat exchanger performance. Further, we discuss some rules-of-thumb for proper design with respect to baffle cut, spacing, and orientation. Finally, we will provide a summary of the performance characteristics of the different baffle types, to...
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This webinar will discuss Xist and CFD predictions of three NTIW exchanger configurations – 2 baffle, 4 baffles, and 6 baffles. The discussion will focus on the contributions of crossflow and longitudinal flow on heat transfer, which is due to varied baffle spacing for the same baffle cut. During the webinar,...
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Component: Xist, Xvib Applicable to: All supported versions (versions 7.3 and 8) Date posted: 15 May 2018   TEMA H shells are commonly used as horizontal shellside reboilers. They can be baffled or nonbaffled as long as the unsupported span length remains within TEMA guidelines. In nonbaffled cases, the tubes have three...
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This webinar discusses considerations and limitations in the use of single-segmental baffles. It demonstrates the impact of baffle cut and spacing in various process applications....
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Component: Xist Applicable to: All supported versions (versions 7.3 and 8) Date posted: 4 November 2008 Last updated: 10 July 2019 Xvib models the vibration potential of a single tube using a rigorous finite element method. It is the most accurate tool available to estimate the potential for tube damage. Using...
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Component: Xist Applicable to: All supported versions (versions 7.3 and 8) Date posted: 5 December 2019 Disk-and-doughnut baffles are an alternative to conventional segmental baffles. Figure 1 illustrates a generic disk-and-doughnut baffle configuration. In many industrial units, tubes are present only in the overlap region between the disk baffles and the...
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Component: Xist Applicable to: All supported versions (Versions 7.3 and 8) Date posted: 25 March 2015 Compared to other segmental baffle designs, no-tube-in-window (NTIW) baffles provide improved tube support with low pressure drop. Adding intermediate support plates between baffles can alleviate tube vibration for virtually any baffle spacing, thus simplifying low...
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Component: Xist Applicable to: All supported versions (Versions 7.3 and 8) Date posted: 19 August 2009 Double-segmental baffles are TEMA baffles that split the flow along the length of a bundle. The baffle pattern diverts flow with alternating center baffles and wing baffles as shown in Figure 1. Figure 1. Double-segmental...
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Under contract from HTRI, university researchers simulated the fluid flow and heat transfer characteristics in the inlet zone of a shell-and-tube exchanger using computational fluid dynamics (CFD). Results revealed that the ratio of heat transfer to pressure drop for parallel baffle cut orientation was as low as 71 percent of that...
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TRICO Metal Products, Inc. manufactures Square One™ baffles, a strip baffle or egg crate tube support technology for square pitch layouts. This report documents heat transfer and pressure drop methods for shellside flow using Square One baffles. Based on the existing Xist® window flow model, the methods have been adjusted for...
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A shellside helical flow path in a shell-and-tube exchanger can provide a number of distinct advantages over the reversing, serpentine flow path of conventional segmental baffles; however, current open literature prediction methods do not provide the confidence engineers need to make sound design decisions. Several fundamental geometric parameters either are not...
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Disk-and-doughnut baffled heat exchangers can generate more heat transfer with less pressure drop than conventional segmental exchangers in certain industrial applications. Unfortunately, little information is available on these units in service. This report introduces new methods for analyzing and rating a disk-and-doughnut baffled heat exchanger. Using three-dimensional computational fluid dynamics (CFD)...
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HTRI conducted computational fluid dynamics (CFD) simulations to investigate leakage and bypass stream behavior under various flow regimes in an industrial-scale heat exchanger with single-segmental baffles. To cover a wide range of Reynolds numbers, the simulations tested single-phase water and Alta-Vis oil. Both concentric and eccentric configurations of the exchanger’s tube-to-baffle...
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