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Comparative analysis of corrugation effect on thermohydraulic performance of double‐pipe heat exchangers
Author(s) -
Sruthi B.,
Sasidhar A.,
Surendra Kumar A.,
Sahu Mithilesh Kumar
Publication year - 2021
Publication title -
heat transfer
Language(s) - English
Resource type - Journals
eISSN - 2688-4542
pISSN - 2688-4534
DOI - 10.1002/htj.22092
Subject(s) - heat exchanger , heat transfer , materials science , heat transfer coefficient , plate fin heat exchanger , thermal hydraulics , mechanics , micro heat exchanger , tube (container) , hydraulic diameter , mass flow rate , concentric tube heat exchanger , shell and tube heat exchanger , plate heat exchanger , heat transfer enhancement , mechanical engineering , volumetric flow rate , thermodynamics , turbulence , composite material , engineering , reynolds number , physics
Heat transfer augmentation in heat exchangers has been a key research topic in recent times. Over the years, many methods have been proposed for heat transfer enhancement, such as providing fins, changing the cross‐sectional area of tubes, vortex generator, twisted tape inserts, and so forth. In addition to the above‐mentioned techniques, corrugation of tubes was also proposed by a few authors who demonstrated that this method could effectively increase the heat transfer rate. To address the same in this study, the different corrugation profiles have been created with the help of CATIA software for the study. The simulations were performed using ANSYS R19.2. The results so obtained were used to calculate the various thermal and hydraulic perfoallrmance parameters of the heat exchanger with the help of macros created in MS Excel. The result shows that the use of corrugation on the inner tube of the heat exchanger increased the heat transfer coefficient, fanning friction factor, and rate of cooling by 5%–21%, 90%–355%, and 25.67%–157.40%, respectively, in case of the plain double‐pipe heat exchanger for the mass flow rate variation of 5–25 kg/min. It is also observed that the smooth tube has more thermohydraulic performance as 1.2152.