Abstract
The most extensively used heat exchanger in numerous research fields and industrial processes is the shell and tube heat exchanger. The selection of the baffle plays a vital role to regulate and increase the thermohydraulic performance and also to decrease fluid-induced vibrations due to shell side flow. 3-D computational fluid dynamics (CFD) and fluid-structure interaction (FSI) have been done to analyze the pressure drop, heat transfer coefficient, vortex shedding, and tube deformation due to induced vibrations among the recently developed clamping antivibration baffles with square twisted tubes, helical baffles with cylindrical tubes, and conventional segmental baffles with cylindrical tubes at different shell side flow rates by using commercial software ANSYS. Complete heat exchangers are modeled for numerical comparison; the thermohydraulic performance of the numerical model shows the suitable agreement by validating it with already published results and Esso method for single segmental baffles. It is then used to compare the performance of the same heat exchangers with CBSTT and HBCT. Thermohydraulic performance of CBSTT-STHX is better than SGCT-STHX. The heat transfer coefficient of heat exchangers with tube-to-baffle-hole clearance is higher and there is a reduction in the pressure drop compared to the results of STHXs without tube-to-baffle-hole clearance. The deformation in the tubes and vortex-induced vibrations are minimum in STHX with CBSTT than in STHXs with HBCT and SGCT.
Highlights
Many applications of heat exchangers have been implemented to date
For fluid-structure interaction (FSI) the clearance between the tube-to-baffle-hole is considered in the geometry
Results and Discussion to be within 10%, and the average deviation of Esso design from the present results of pressure drop was found to be less than 10%
Summary
Many applications of heat exchangers have been implemented to date. The STHX type is the preferred heat exchanger because it allows permissible designed fluid pressures and temperatures, rough and robust mechanical structures, and maintenance facilities [1]. Researchers have been successful in designing distinct and improved designs of baffles in STHX, these designs have been inadequate to meet the appropriate conditions for fouling, bundle vibration, heat transfer efficiency, assemblage, maintenance, and pumping power consumption This narrows the problem down to the conclusion that the current literature on shell-side flow structure has focused on the longitudinal, transverse, and helical flow patterns. They can effectively eliminate stagnant turbulent fluid flow zones and elude flow induced vibrations in contrast with the conventional STHXs involving segmental and helical baffle types by flowing the shell-side fluid longitudinally through the gaps in the baffles. In this research there is a study of heat transfer rate, pressure drop, and control of the flow-induced vibrations
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
