Shell-and-tube heat exchangers performance improvement employing hybrid segmental–helical baffles and ribbed tubes combination

Uosofvand, Hamed; Arani, Ali Akbar Abbasian

doi:10.1007/s40430-021-03109-y

Cited by 7 publications

(2 citation statements)

References 44 publications

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“…Baffles are used as flow-directing panels for liquid or gas flow. By using the baffle, the dead areas are eliminated, and better mixing of the flow in the system is done, and as a result, the heat transfer is improved (Bahiraei et al 2021 , El-Said et al 2021 , Uosofvand and Abbasian Arani 2021 ). Enhanced heat transfer, flow control, residence time control, and vibration reduction can be mentioned among the advantages of twisted tapes.…”

Section: Methods Of Improving Heat Transfer In Fpscsmentioning

confidence: 99%

Recent progress on flat plate solar collectors equipped with nanofluid and turbulator: state of the art

Zaboli,

Saedodin,

Ajarostaghi

et al. 2023

Environ Sci Pollut Res

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This paper reviews the impacts of employing inserts, nanofluids, and their combinations on the thermal performance of flat plate solar collectors. The present work outlines the new studies on this specific kind of solar collector. In particular, the influential factors upon operation of flat plate solar collectors with nanofluids are investigated. These include the type of nanoparticle, kind of base fluid, volume fraction of nanoparticles, and thermal efficiency. According to the reports, most of the employed nanofluids in the flat plate solar collectors include Al2O3, CuO, and TiO2. Moreover, 62.34%, 16.88%, and 11.26% of the utilized nanofluids have volume fractions between 0 and 0.5%, 0.5 and 1%, and 1 and 2%, respectively. The twisted tape is the most widely employed of various inserts, with a share of about one-third. Furthermore, the highest achieved flat plate solar collectors’ thermal efficiency with turbulator is about 86.5%. The review is closed with a discussion about the recent analyses on the simultaneous use of nanofluids and various inserts in flat plate solar collectors. According to the review of works containing nanofluid and turbulator, it has been determined that the maximum efficiency of about 84.85% can be obtained from a flat plate solar collector. It has also been observed that very few works have been done on the combination of two methods of employing nanofluid and turbulator in the flat plate solar collector, and more detailed work can still be done, using more diverse nanofluids (both single and hybrid types) and turbulators with more efficient geometries.

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Section: Methods Of Improving Heat Transfer In Fpscsmentioning

confidence: 99%

Recent progress on flat plate solar collectors equipped with nanofluid and turbulator: state of the art

Zaboli,

Saedodin,

Ajarostaghi

et al. 2023

Environ Sci Pollut Res

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“…Pidaparthi et al [1] discussed the entropy generation in tubes with internal helical fins of heat exchanger and analyzed the optimum geometric parameters in two different entropy based mathematical formulations. Uosofvand et al [2] compared a new hybrid segmentalhelical baffles shell and tube heat exchanger with various ribbed tubes. They have used solid works flow simulation software by the computation fluid dynamic method and concluded the ribbed tube heat exchanger has good performance evaluation criteria.…”

Section: Introductionmentioning

confidence: 99%

Computational Analysis of Conventional and Helical Finned Shell and Tube Heat Exchanger Using ANSYS-CFD

Pasupuleti¹,

Bedhapudi²,

Reddy³

et al. 2021

IJHT

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The summary of the proposed work is to compare the rate of heat transfer, logarithmic mean temperature difference (LMTD) and effectiveness (ε) for a conventional shell and tube heat exchanger with and without helical finned surfaces on tube side of heat exchanger. It is shown that the inlet velocity of cold fluid at the tube side varies, while the inlet velocity of hot fluid at the shell side remains constant. The percentage variations of heat transfer rates with theoretical and simulation methods are compared. The geometry is modelled in ANSYS design modeler and analysis have been carried out in ANSYS-CFD. The inlet velocity of shell side hot fluid is varied in both types of heat exchangers. The proposed work is tested for two configurations of counter flow heat exchanger (conventional and helical finned surfaces) under different shell side inlet velocities of fluids. Helical finned tube heat exchanger with counter flow has a higher LMTD than a conventional counter flow heat exchanger. Variation in heat transfer rates and heat transfer coefficients were observed in heat exchanger influenced by shell side hot fluid velocity. The study shows that helical finned tube surfaces have improved heat transfer rates, LMTD, effectiveness (ε) and overall heat transfer coefficients compared to the conventional heat exchangers.

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Performance improvement prediction of push chain moist-mix concrete spraying machine employing orifice plate

Chen

et al. 2022

J Mech Sci Technol

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Shell-and-tube heat exchangers performance improvement employing hybrid segmental–helical baffles and ribbed tubes combination

Cited by 7 publications

References 44 publications

Recent progress on flat plate solar collectors equipped with nanofluid and turbulator: state of the art

Recent progress on flat plate solar collectors equipped with nanofluid and turbulator: state of the art

Computational Analysis of Conventional and Helical Finned Shell and Tube Heat Exchanger Using ANSYS-CFD

Performance improvement prediction of push chain moist-mix concrete spraying machine employing orifice plate

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