Enhancement of Heat Transfer in Concentric Tube Heat Exchanger by Attaching Vortex Generator on Tube Surface

Uttam Patel1 Piyush Kumar Verma2 Dr. B. Suresh3
  • 1Research Scholar, Department of Mechanical Engineering, Corporate Institute Of Science & Technology, Bhopal
  • 2Asst Prof., Department of Mechanical Engineering, Corporate Institute Of Science & Technology, Bhopal
  • 3Prof. & HOD, Department of Mechanical Engineering, Corporate Institute Of Science & Technology, Bhopal

keywords : Heat transfer, computational fluid dynamics, vertex generator, turbulence, etc.

Abstract

This study focuses on the evaluation of “heat transfer enhancement” (HTE) performance in a “Concentric Tube Heat Exchanger” (CTHE) utilizing a trapezoidal vortex generator. The analysis is conducted using the “Computational Fluid Dynamics” (CFD) software “ANSYS Fluent”. The analysis of heat transmission and fluid flow is performed for different configurations of vertex generators. The study also examines the impacts of Vortex Generators (VGs) and simulates the turbulence flow using the “k- model”. The study involved the examination of four distinct configurations, in which the VGs were positioned at varying locations and inclination angles relative to the tube axis. The VGs are angled at 30 degrees within the tube in Case 1. The VGs in Case 2 are angled at a right angle to the tube. In Case 3, there are 40 VGs located either inside or outside the tube. Lastly, in Case 4, there are 48 VGs positioned either inside or outside the tube. In order to investigate the impact of VGs on flow and heat transfer enhancement, the outlet temperature of the hot and cold fluids, as well as the temperature of the hot and cold fluids throughout the length of the tube, and each of the adjusted cases' pressure drops for both hot and cold fluids are adjusted to case 1's standard. The results indicate that VGs are efficacious in all scenarios. Nevertheless, the most significant enhancement in temperature gap was seen in instance 3 for the outer tube fluid and case 4 for the inner tube fluid. There exists a negligible difference in temperature between case 3 and case 4 within the inner tube.

PUBLISHED
2024-04-01
ISSUE
Vol 3 Issue 2 (2024)

Journal Details

   ISSN : 2583 – 7117

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