Experimental investigation on laminar heat transfer performances of RP-3 at supercritical pressure in the helical coiled tube

Lei, Zhiliang; Bao, Zewei

doi:10.1016/j.ijheatmasstransfer.2021.122326

Cited by 10 publications

(1 citation statement)

References 28 publications

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“…Similarly, to predict the heat transfer coefficient of supercritical fluids in curved tubes, correlations of Yi et al [94], Lei et al [65], Huang et al [98], Bai et al [100], Zhang et al [92], Wen et al [55], Pei et al [71] and Zhang et al [49] have been proposed. All of these correlations for curved tubes are based on the heat transfer correlation for straight tubes.…”

Section: The Effect Of Flow Direction On the Axial Directionmentioning

confidence: 99%

Research Progress on Convective Heat Transfer Characteristics of Supercritical Fluids in Curved Tube

Liu

et al. 2022

Energies

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Because of their compact structure, ease of processing and higher heat transfer coefficient, curved-tube heat exchangers are widely applied in various industry applications, such as nuclear power systems, solar-powered engineering, aircraft engine cooling systems and refrigeration and cryogenic systems. Accurate knowledge about the heat transfer characteristics of the supercritical fluids in the tube is critical to the design and optimization of a curved-tube heat exchanger. The available literature indicates that the flow of supercritical fluids flowing in curved tubes affected by the dual effects of the buoyancy force and centrifugal force is more complex compared to straight tubes. Therefore, to obtain insight into their unique characteristics and further research progress, this paper presents a comprehensive review of available experimental and numerical research works on fluids at supercritical pressure flowing in curved tubes. Overall, the secondary flow caused by the curvature enhances the heat transfer and delays the heat transfer deterioration, but it also causes a non-uniform heat transfer distribution along the circumferential direction, and the strengthening performance of the curved tube is damaged. Compared with the more mature theories regarding straight tubes, the flow structure, the coupling mechanism of buoyancy and centrifugal force, and the general heat transfer correlation of supercritical fluids in a curved tube still urgently need to be further studied. Most importantly, studies on the suppression of heat transfer oscillations and heat transfer inhomogeneities specific to curved tubes are scarce. Considering the current status and shortcomings of existing studies, some study topics for supercritical fluids in a curved tube are proposed.

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Section: The Effect Of Flow Direction On the Axial Directionmentioning

confidence: 99%

Research Progress on Convective Heat Transfer Characteristics of Supercritical Fluids in Curved Tube

Liu

et al. 2022

Energies

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Study of heat transfer and pressure drop for novel configurations of helical tube heat exchanger: a numerical and experimental approach

Marzouk

Al-Sood

El‐Said

et al. 2023

J Therm Anal Calorim

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In this study, several unique tube configurations are designed and modeled to examine the thermal and hydraulic performance of a helical tube heat exchanger (HTHE) experimentally and numerically. For cold and hot side tube designs, the numerical investigation is completed using three-dimensional modeling, and the findings are confirmed using experimental data with Reynolds numbers ranging from 16,000 to 25,000. Six configurations named HTHE1, HTHE2, HTHE3, HTHE4, HTHE5, and HTHE6 are tested. The findings showed that as compared to the uniform tube distribution, the new arrangements have a greater overall heat transfer coefficient. The overall heat transfer coefficient has the highest enhancement ratio (125–185%) in the HTHE6 setup with two pathways. Additionally, it is discovered that the pressure drop rises as the Reynolds number increases. The HTHE1 configuration has the highest pressure drop values, whereas configurations with only one pass result in a greater pressure loss when compared to setups with two paths. The values of the coefficient of performance for the HTHE6 are larger than those of other forms, and the coefficient of performance decreases as the Reynolds number increases. The exergy efficiency grows with the rise of Reynolds number where the HTHE6 has the maximum value of exergy efficiency compared to other shapes. The performance of heat transfer is dramatically improved by the novel tube arrangements, although variations in pressure drop and pumping power are only a little affected.

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Mechanism analysis of turbulent convective heat transfer of supercritical carbon dioxide in serpentine tubes

Khoshvaght-Aliabadi,

Zakizadeh-Matak

2024

Applied Thermal Engineering

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Experimental investigation on laminar heat transfer performances of RP-3 at supercritical pressure in the helical coiled tube

Cited by 10 publications

References 28 publications

Research Progress on Convective Heat Transfer Characteristics of Supercritical Fluids in Curved Tube

Research Progress on Convective Heat Transfer Characteristics of Supercritical Fluids in Curved Tube

Study of heat transfer and pressure drop for novel configurations of helical tube heat exchanger: a numerical and experimental approach

Mechanism analysis of turbulent convective heat transfer of supercritical carbon dioxide in serpentine tubes

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