Design optimization of a high-temperature fin-and-tube heat exchanger manifold – A case study

Ocłoń, Paweł; Łopata, Stanisław; Stelmach, Tomasz; Li, Mingjie; Zhang, Jianfei; Mzad, Hocine; Tao, Wen‐Quan

doi:10.1016/j.energy.2020.119059

Cited by 27 publications

(8 citation statements)

References 37 publications

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“…Moreover, by increasing the amount of nanoparticles in the working fluid, the vortex's velocity magnitude above the tubes was reduced. As mentioned, adding nanoparticles to a base fluid led to density and dynamic viscosity augmentation based on Equations ( 11) and (12). The presence of nanoparticles in the base fluid increased the shear stress between the layers of the fluid.…”

Section: Heat Transfer Coefficientmentioning

confidence: 91%

“…Shape modification of the heat exchanging media is another potential solution that can increase heat transfer. For example, it was desirable for the hydrodynamics of shell and tube heat exchangers to change their baffles arrangement to elliptical or angular layout or jagged edges [11][12][13]. This, in turn, can improve the heat transfer, mainly when nanofluids are implemented as the heat transfer fluid in the system [14,15].…”

Section: Introductionmentioning

confidence: 99%

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Non-Isothermal Hydrodynamic Characteristics of a Nanofluid in a Fin-Attached Rotating Tube Bundle

Alazwari

Safaei

2021

Mathematics

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In the present study, a novel configuration of a rotating tube bundle was simulated under non-isothermal hydrodynamic conditions using a mixture model. Eight fins were considered in this study, which targeted the hydrodynamics of the system. An aqueous copper nanofluid was used as the heat transfer fluid. Various operating factors, such as rotation speed (up to 500 rad/s), Reynolds number (10–80), and concentration of the nanofluid (0.0–4.0%) were applied, and the performance of the microchannel heat exchanger was assessed. It was found that the heat transfer coefficient of the system could be enhanced by increasing the Reynolds number, the concentration of the nanofluid, and the rotation speed. The maximum enhancement in the heat transfer coefficient (HTC) was 258% after adding a 4% volumetric nanoparticle concentration to the base fluid and increasing Re from 10 to 80 and ω from 0 to 500 rad/s. Furthermore, at Re = 80 and ω = 500 rad/s, the HTC values measured for the nanofluid were 42.3% higher than those calculated for water, showing the nanoparticles' positive impact on the heat transfer paradigm. Moreover, it was identified that copper nanoparticles' presence had no significant effect on the system's pressure drop. This was attributed to the interaction of the fluid flow and circulated flow around the tubes. Finally, the heat transfer coefficient and pressure drop had no considerable changes when augmenting the rotation speed at high Reynolds numbers.

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Section: Heat Transfer Coefficientmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Non-Isothermal Hydrodynamic Characteristics of a Nanofluid in a Fin-Attached Rotating Tube Bundle

Alazwari

Safaei

2021

Mathematics

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“…(2021) (Oco et al) [5] A optimisation of a high heat fins and tubes heat transfer system is presented in this test case. A revised heat transfer manifolds layout is offered.…”

Section: Literature Reviewmentioning

confidence: 99%

Review on Heat Exchangers with Different Geometries and Flow Arrangement

Gautam¹,

Sagar²

2022

IJOSCIENCE

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A heat exchanger is a device that enables heat from one fluid (liquid or gas) to be transferred to some other fluid (liquid or gas) without the two fluids mixing or coming into direct contact. The various sorts of fluid flows in different types of heat exchanging systems are discussed in this paper.Heat exchangers can be found in a variety of locations, generally working to warm up or cool buildings or to improve the efficiency of engines and machineries. Refrigerators and air conditioners, for example, use heat exchangers in the opposite way that central heating systems do: they remove heat from a chamber or room that isn't needed and pump it away in a fluid to another location that can be dropped out of the way. The refrigerating fluid is completely enclosed within a series of channels, so it never comes into direct contact with the air: it extracts heat energy from the air inside and dumps it in the air outside, but it never mixes with it.

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“…From the ancient, many experiments and numerical approaches [22][23][24][25][26] were applied to insert the circular tubes as the tabulator creator or vortex generator to enhance the heat transfer in the rectangular channel in such a way a valuable heat exchanger can be made. Also, much literature [27][28][29] can be found that developed the correlations among the fluid dynamics parameter and the non-dimensional parameter which might help design the heat exchanger of any shape. Many of the researchers who had focused on the shape of the heat exchanger for example [30][31][32] have suggested that increasing the heat transfer in the tube dimpled channel proved to be the most beneficial in terms of transferring the heat than the plain tubes.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Non-Isothermal Turbulent Flows Through Circular Rings of Steel

Memon¹,

Memon²,

Bhatti³

et al. 2022

Computers, Materials &Amp; Continua

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This article is intended to examine the fluid flow patterns and heat transfer in a rectangular channel embedded with three semi-circular cylinders comprised of steel at the boundaries. Such an organization is used to generate the heat exchangers with tube and shell because of the production of more turbulence due to zigzag path which is in favor of rapid heat transformation. Because of little maintenance, the heat exchanger of such type is extensively used. Here, we generate simulation of flow and heat transfer using nonisothermal flow interface in the Comsol multiphysics 5.4 which executes the Reynolds averaged Navier stokes equation (RANS) model of the turbulent flow together with heat equation. Simulation is tested with Prandtl number (Pr = 0.7) with inlet velocity magnitude in the range from 1 to 2 m/sec which generates the Reynolds number in the range of 2.2 × 10 5 to 4.4 × 10 5 with turbulence kinetic energy and the dissipation rate in ranges (3.75 × 10 −3 to 1.5 × 10 −2 ) and (3.73 × 10 −3 −3 × 10 −2 ) respectively. Two correlations available in the literature are used in order to check validity. The results are displayed through streamlines, surface plots, contour plots, isothermal lines, and graphs. It is concluded that by retaining such an arrangement a quick distribution of the temperature over the domain can be seen and also the velocity magnitude is increasing from 333.15% to a maximum of 514%. The temperature at the middle shows the consistency in value but declines immediately at the end. This process becomes faster with the decrease in inlet velocity magnitude.

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Design optimization of a high-temperature fin-and-tube heat exchanger manifold – A case study

Cited by 27 publications

References 37 publications

Non-Isothermal Hydrodynamic Characteristics of a Nanofluid in a Fin-Attached Rotating Tube Bundle

Non-Isothermal Hydrodynamic Characteristics of a Nanofluid in a Fin-Attached Rotating Tube Bundle

Review on Heat Exchangers with Different Geometries and Flow Arrangement

Simulation of Non-Isothermal Turbulent Flows Through Circular Rings of Steel

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