Effect of segmental baffles on the shell-and-tube heat exchanger effectiveness

Vukic, V Mica; Tomic, Aleksandar; Živković, Milutin; Ilic, S Gradimir

doi:10.2298/hemind130127041v

Cited by 11 publications

(6 citation statements)

References 3 publications

(3 reference statements)

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“…Maximum heat transfer from hot fluid occurs at baffle with angle 0 o and high 30mm. Also baffles number increases Nusselt number at high fluid flow rate while a little effect of baffle height and number on the fluid pressure drop is absorbed as obtained by Mica et.al [1]. …”

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confidence: 59%

Numerical Investigation of Heat Transfer and Flow Characteristics in Shell-and U-Tube Heat Exchanger With Baffles

Fahad

Alshara

Saeed

2017

juod

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In this paper the numerical model of cylindrical coordinates, three dimensional of a laminar heat transfer and fluid flow inside shell and tube heat exchanger is examined. The thermo-hydraulic performance of heat exchangers is predicted with finite volume method by CFD simulations using ANSYS 15.0 code. Shell-and-tube heat exchanger is consisted of one pass of warm water laminar flow at the shell side and two passes single tube of laminar cold water. The annular baffles are inserted on shell side, and on the facing distances of the length of tube from the outer surface. Baffles are inserted with staggered position on the shell and tube to achieve good fluid circulation. Also baffles on the tube side are varied with angle inclination, number and diameter while only number and length on the shell side. The tube baffles angle inclination as (45º, 0º and -45 º) and without baffles and the range of Reynolds number from 100 to 2000. The results show high effect of baffles angles on the heat exchanger performance at high Reynolds number. Maximum heat transfer from hot fluid occurs at baffle with angle 0 o and high 30mm. Also baffles number increases Nusselt number at high fluid flow rate while a little effect of baffle height and number on the fluid pressure drop is absorbed as obtained by Mica et.al [1].

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confidence: 59%

Numerical Investigation of Heat Transfer and Flow Characteristics in Shell-and U-Tube Heat Exchanger With Baffles

Fahad

Alshara

Saeed

2017

juod

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“…Ozden and Tari [7] observed the shell side of the shell-and-tube heat exchanger using numerical modelling in a small heat exchanger. Vukic et al [8] also discussed about the effectiveness of shell-and-tube heat exchanger using different variation number of segmental baffle.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Flow of the Disc-and-Doughnut Baffles and 40% Cut Segmental Baffles

Tanujaya¹,

Darmawan²

2021

IJHT

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Heat exchanger is usually used in manufacturing process. At present, many researchers have efforts to increase the performance of the heat exchanger with less of the cost. This research discussed about the performance of heat exchanger using 40% cut segmental baffles compared with modified double segmental baffles disc-and-doughnut type. In this study, the investigation of the computational results consisted of heat flux, velocity profile along the heat exchanger, pressure distribution and, theoretical heat transfer coefficient and heat exchanger effectiveness. The model was calculated using finite difference method forward modeling with Multiphysics Software and focuses on the performance evaluation of the small shell-and-tube heat exchanger (STHE) – laboratory type. The tubes are composed of 14 tubes with 0.583 m length, triangular 30° rotated pitch. The pipe radius of shell and tube are 0.055 m and 0.00635 m, respectively. The baffle radius of disc and doughnut are 0.055 m and 0.025 m, respectively, and the baffle radius of 40% cut segmental baffles are 0.055 m. Both types of the baffle have a distance of 0.116 m which is evenly distributed along the shell. The generalized minimal residual (GMRES) method for the fluid flow case used as an iterative method for solving some of the complex linear equations shows good performance as in reliability and validity. For the 40% cut segmental baffles, fluid flow makes a zigzag pattern, an Eddy or swirling of a fluid, and there was some back mixing of fluid stream which caused several dead zones along the shell. The occurrence of the dead zones caused the heat transfer to be ineffective and gave lower value compared to the double segmental disc-and-doughnut baffles. The 40% cut segmental baffles was also seen to have a higher pressure at the outlet region than the double segmental disc-and-doughnut baffles. The disc-and-doughnut baffles leads to a turbulent fluid flow which causes an increase in heat transfer characteristics and also lower pressure drop than the 40% cut segmental baffles. Based on the theoretical, both types of disc-and-doughnut baffles and the 40% cut segmental baffles of heat exchanger investigated have highest effectiveness at the lowest mass flow rate of the hot fluids (tube).

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“…Enriched performance of STHXs being considered to preserve energy [2]. To enhance thermal performance baffles shapes inside STHXs play a vital role, not only that but they also ensure support to the tube bundles [3].…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Shell and Tube Heat Exchanger with Different Tube and Baffle Designs: Three-Dimensional Computational Fluid Dynamics (CFD) and Two-Way FSI Analysis

A.¹,

Naqvi²,

Zafar³

et al. 2020

Preprint

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Effect of segmental baffles on the shell-and-tube heat exchanger effectiveness

Cited by 11 publications

References 3 publications

Numerical Investigation of Heat Transfer and Flow Characteristics in Shell-and U-Tube Heat Exchanger With Baffles

Numerical Investigation of Heat Transfer and Flow Characteristics in Shell-and U-Tube Heat Exchanger With Baffles

Investigation of Flow of the Disc-and-Doughnut Baffles and 40% Cut Segmental Baffles

Performance Analysis of Shell and Tube Heat Exchanger with Different Tube and Baffle Designs: Three-Dimensional Computational Fluid Dynamics (CFD) and Two-Way FSI Analysis

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