Numerical study of the thermo-energy of a tubular heat exchanger with longitudinal baffles

Salhi, Jamal‐Eddine; Zarrouk, Tarik; Salhi, Najim

doi:10.1016/j.matpr.2020.12.1213

Cited by 14 publications

(4 citation statements)

References 11 publications

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“…Salhi vd. [40] dairesel kesitli düz bir boru içerisine dikdörtgen ve üçgen kesitli uzunlamasına yerleştirilmiş bölmelerin akış ve ısı transferini k-ε türbülans modeli ile incelemişler ve sonuçta dikdörtgen kesitli bölmelerin ısı transferi açısından üçgen kesitli bölmelerden daha iyi olduğunu göstermişlerdir. Bidari vd.…”

Section: Introductionunclassified

Investigation of Effects of Baffle Heights on Flow and Heat Transfer in a Trapezoidal Channel with Vertical Baffles

Akçay

2022

Bitlis Eren Üniversitesi Fen Bilimleri Dergisi

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Bu çalışmada, üst duvarında dik bölmeler bulunan, alt duvarı trapez şeklinde dalgalandırılmış bir kanalda farklı bölme yüksekliğinin akış ve ısı transferine etkileri nanoakışkan ve taban akışkan akışı için sayısal olarak incelenmiştir. Nanoakışkan olarak TiO2 nanopartiküllerin su içerisinde süspansiyonu kullanılmış ve nanopartikül hacim oranı, φ=%1 sabit tutulmuştur. Sayısal çalışma, Hesaplamalı Akışkanlar Dinamiği (HAD) tabanlı FLUENT 15.0 programı ile iki boyutlu gerçekleştirilmiştir. Kanalın bölmeler içeren üst yüzeyinin adyabatik olduğu kabul edilmiş ve alt trapez yüzeyi Tw=360K sabit sıcaklıkta korunmuştur. İki farklı bölme yüksekliği (t=H/2 ve t=2H/3) kullanılarak farklı Reynolds sayıları (200≤Re≤1200) için nanoakışkanın ve taban akışkanın Nusselt sayısı (Nu), sürtünme faktörü (f) ve termo-hidrolik performansı (THP) hesaplanmıştır, ayrıca çalışma bölmelerin olmadığı kanal akışı ile de karşılaştırılmıştır. Kanal içerisinde farklı parametrelerde hız ve sıcaklık görüntüleri elde edilmiştir. Sayısal sonuçlar, trapez bir kanalda bölmelerin yüksekliğine ve nanoakışkana bağlı olarak ısı transferinin önemli ölçüde iyileştiğini, ancak sürtünmenin de bir miktar arttığını göstermiştir. En yüksek termo-hidrolik performans, bölmesiz kanalda taban akışkana göre, TiO2-su nanoakışkan akışında Re=400 ve t=2H/3 bölme yüksekliğinde 1,95 olarak elde edilmiştir.

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Section: Introductionunclassified

Investigation of Effects of Baffle Heights on Flow and Heat Transfer in a Trapezoidal Channel with Vertical Baffles

Akçay

2022

Bitlis Eren Üniversitesi Fen Bilimleri Dergisi

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“…Any process that involves cooling, warming, condensing, melting, or evaporating, for example, will necessitate the use of an exchanger. Well before procedure, process fluids are frequently heated or cooled, or they go through a phase transition [6,7]. Various thermal exchangers have different names depending on what they are used for.…”

Section: Introductionmentioning

confidence: 99%

CFD Analysis of Various Design Aspects in Baffle Tube Heat Exchanger

Mishra¹,

Daniel²,

Asthana³

2022

IJOSCIENCE

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To improve temperature difference, a computer simulation assessment for a rectangular duct with right angle confounds heat exchanger with small displacements and bewilder height was carried out. A total of 10 There were three separate two half Autocad models of rectangular shaped channel with bewilders spacing of 40 milimetre, 80 milimetre, and 120 milimetre and baffle heights of 10 mm, 12.5 milimetre, and 15 milimetre developed. The major goal of this study is to run computer simulations to see how Cu water nanoparticle affect the architecture and thermally hydrodynamic characteristics of a rectangular duct with baffles exchanger. The bottom walls of the canal, as well as the baffles, are regarded isothermal zones, whereas the sidewalls are termed regular zones. This approach employs a second derivative upwind mass and energy equation. The baffle pitch and height have a significant influence on the temperature distribution from the rectangle shaped channel heating element, with a maximal temperature fluctuations of 9.831oC and a maximum heat transfer of 6.571 KW for baffle spacing 40 mm and height 15 mm for rectangle channel without opposite baffles. In comparison to the base design of rectangle shaped channels exchanger, the temperature difference increases nearly 1.5 times as even the width is decreased.

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“…The results revealed that the use of the baffles contributed to reducing the pressure drop by about 34.14% and improved the heat transfer satisfactorily. Salhi et al [16] performed a computational study of the flow and heat transfer characteristics in a tubular heat exchanger with longitudinal baffles attached to its inner wall. The tube considered is equipped with longitudinal baffles of the rectangular or triangular cross-section.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Spacing Design of Two Alternate Baffles on the Performance of Heat Exchangers

Salhi

Amghar

Filali

et al. 2022

DDF

Self Cite

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The present study investigates numerically the heat transfer process based forced convective flow of an incompressible fluid in a two-dimensional rectangular channel. Two baffles are imposed periodically on the lower and upper walls. The study mainly focused on the influence of the arrangement and spacing separating the baffles on the heat transfer's intensification. The values of the Reynolds number for the present turbulent flow regime were chosen in the range of 104 to 8.73 × 104. The equations resulting from the three conservation laws, namely continuity, Navier-Stokes, and energy equations, are solved numerically based on the finite volume method. SIMPLE algorithm is used to overcome the pressure-velocity coupling, and k-ε model is used for the computation of turbulent patterns. Numerical simulations are carried out to study the dynamic and thermal behavior influenced by the control parameters. The physical quantities calculated are the axial velocity, the local, mean Nusselt numbers and the friction coefficient. The obtained results show that the friction coefficient decreases proportionally with the increase of Re number, and the local Nusselt number increases with the Reynolds number. As the spacing between the baffles decreases, the NR ratio increases, and as the Reynolds number increases, NR decreases NR = 6.13, 5.31, 4.62, and 4.30 for case P1, NR = 5.1, 4.5, 3.89, and 3.64, for case P2, NR = 5.00, 4.45, 8.83, and 3.51, for case P3, for equal Reynolds number, 104, 2×104, 4×104, 8.73×104, respectively.

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Numerical study of the thermo-energy of a tubular heat exchanger with longitudinal baffles

Cited by 14 publications

References 11 publications

Investigation of Effects of Baffle Heights on Flow and Heat Transfer in a Trapezoidal Channel with Vertical Baffles

Investigation of Effects of Baffle Heights on Flow and Heat Transfer in a Trapezoidal Channel with Vertical Baffles

CFD Analysis of Various Design Aspects in Baffle Tube Heat Exchanger

Effect of the Spacing Design of Two Alternate Baffles on the Performance of Heat Exchangers

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