Experimental study on heat transfer and pressure drop of twisted oval tube bundle in cross flow

Li, Xiuzhen; Zhu, Dongsheng; Yin, Yingde; Liu, Shijie; Mo, Xun

doi:10.1016/j.expthermflusci.2018.07.030

Cited by 42 publications

(8 citation statements)

References 29 publications

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“…Yin [1,2] and others studied the three-dimensional tube evaporator and condenser in the field of refrigeration, and found that the three-dimensional tube evaporator and condenser have a positive impact on the COP (coefficient of performance) of the refrigeration unit. The results show that the heat transfer performance of the three-dimensional tube is better than that of the smooth tube after Xiuzhen Li et al [3][4][5], who studied the heat transfer performance (coefficient of performance) of the refrigeration unit. The results show that the heat transfer performance of the three-dimensional tube is better than that of the smooth tube after Xiuzhen Li et al [3][4][5], who studied the heat transfer performance of a three-dimensional tube bundle with lateral air scour.…”

Section: Introductionmentioning

confidence: 99%

“…The results show that the heat transfer performance of the three-dimensional tube is better than that of the smooth tube after Xiuzhen Li et al [3][4][5], who studied the heat transfer performance (coefficient of performance) of the refrigeration unit. The results show that the heat transfer performance of the three-dimensional tube is better than that of the smooth tube after Xiuzhen Li et al [3][4][5], who studied the heat transfer performance of a three-dimensional tube bundle with lateral air scour. Based on the analysis of the comprehensive heat transfer performance and the law of the three-dimensional tube used in the shell and tube heat exchanger and flue gas heat exchanger by Xun Mo et al [6][7][8], it is concluded that the comprehensive performance of the three-dimensional tube is the best among several kinds of enhanced tubes.…”

Section: Introductionmentioning

confidence: 99%

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Study on Comprehensive Performance of Three-Dimensional Tube Applied to Gas–Solid Two-Phase Flow Environment

Liu

et al. 2021

Energies

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The three-dimensional tubular heat exchanger has excellent performance in single-phase flow, but its performance in gas solid two-phase flow is still lacking research. In this paper, analysis and comparison of heat exchanger prototypes made up of four different three-dimensional tubes by different comprehensive performance evaluation methods are carried out through experimental research and theoretical analysis. The research results show that the ratio of the long axis to the short axis of the three-dimensional tube has an important influence on its heat transfer performance and flow resistance. Furthermore, a reasonable ratio can be obtained by comparing its comprehensive performance. Among the comprehensive performance analysis results of four kinds of three-dimensional tubes, the comprehensive performance factor ηo-I of type I is the best which achieves the purpose of heat transfer enhancement. Results from the current research could provide beneficial guidance for further design and application of the three-dimensional tubular heat exchanger.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study on Comprehensive Performance of Three-Dimensional Tube Applied to Gas–Solid Two-Phase Flow Environment

Liu

et al. 2021

Energies

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“…Nevertheless, there was a great difference in the fluid FPD for different particle size and shape in packed beds. In addition, the existing fluid FPD correlations in particle-packed beds were mainly in the form of Ergun's equation and f p , while the FPD correlation in the form of Euler number (Eu) only appeared in the study of FPD in heat exchangers [31][32][33]. Based on an authors' literature survey, there is almost no research to investigate the fluid FPD correlation in the form of Eu in particle-packed beds.…”

Section: Introductionmentioning

confidence: 99%

Determination of Pressure Drop Correlation for Air Flow through Packed Bed of Sinter Particles in Terms of Euler Number

et al. 2022

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In order to clearly understand the air flow resistance characteristics in vertical tanks for sinter waste heat recovery in the steel industry, experimental research on the air flow pressure drop (FPD) performance in a sinter bed layer (BL) was conducted. Based on a self-made experimental device, the measurement values of air FPD for different experimental conditions were determined firstly, and then the concept of Euler number (Eu) in heat exchangers was introduced into the study of air FPD in BL; the change rules of Eu under different particle diameters were analyzed. Finally, the air FPD correlation in sinter BL was obtained and described in the form of Eu, and the error analysis of obtained air FPD correlation was performed. The results show that, the air FPD increases as a second power relationship with the increase in air superficial velocity when the particle diameter is constant. The decrease amplitude of Eu gradually dwindles when increasing the Reynolds number (Re), and the decrease in the Eu shows a reciprocal relationship with the Re. As the bed geometry factor increases, the FPD coefficient, A, decreases as an exponential relationship, while the FPD coefficient, B, increases as a first power relationship. The obtained air FPD correlation in the form of Eu in the experiment is well compatible with the measurement values, and the mean deviation of obtained correlation is 4.67%, showing good originality.

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“…Terukazu et al (1984) indicated that the efficiency of the elliptical tube is better than the circular tube. Li et al (2018) investigated the efficiency of elliptical tubes experimentally in the Reynolds numbers from 7,500 to 18,000. Their results indicated the superiority of these types of tubes rather than circular tubes.…”

Section: Introductionmentioning

confidence: 99%

“…Experimental results revealed that the twisted elliptical tubes provided substantial heat transfer enhancement accompanies with high-pressure drop. Li et al (2018) presented an experimental investigation on air side pressure drop, heat transfer and performance bundle of the twisted oval tube having staggered arrangement in crossflow. This research showed that the performance of the studied bundle of the twisted oval tubes is greater than that of the round tube bundle.…”

Section: Introductionmentioning

confidence: 99%

Different tube bundles effect on the shell-and-tube heat exchanger performance

Arani

Uosofvand

2021

HFF

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Purpose This paper aims to present a numerical investigation on laboratory-scale segmental baffles shell-and-tube heat exchanger (STHX) having various tube bundles and baffle configuration. Design/methodology/approach To discover the higher performance the thermohydraulic behavior of shell-side fluid flow with circular, elliptical and twisted oval tube bundles with segmental and inclined segmental baffled is compared. Shell side turbulent flow and heat transfer are simulated by a finite volume discretization approach using SolidWorks Flow Simulation. To achieve greater configuration performance of this device, the following two approaches is considered: using the inclined baffle with 200 angles of inclination and applying the different tube bundle. Findings Different parameters as heat transfer rate, pressure drop (Δp), heat transfer coefficient (h) and heat transfer coefficient to pressure drop ratio (h/Δp) are presented and discussed. Besides, for considering the effect of pressure penalty and heat transfer improvement instantaneously, the efficiency evaluation coefficient (EEC) in the fluid flow and heat transfer based on the power required to provide the real heat transfer augmentation are used. Originality/value Obtained results displayed that, at the equal mass flow rate, the twisted oval tubes with segmental baffle decrease the pressure drop 53.6% and 35.64% rather than that the circular and elliptical tubes bundle, respectively. By comparing the (h/Δp) ratio, it can result that the STHX with twisted oval tubes bundle (both segmental and inclined baffle) has better performance than other kinds of the tube bundles. Present results showed that the values of the EEC for all provided models are higher than 1, except for elliptical tube bundles with segmental baffles. The STHX with twisted oval tube bundles and segmental baffle gives the highest EEC value equal to 1.16 in the range of investigated mass flow.

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Experimental study on heat transfer and pressure drop of twisted oval tube bundle in cross flow

Cited by 42 publications

References 29 publications

Study on Comprehensive Performance of Three-Dimensional Tube Applied to Gas–Solid Two-Phase Flow Environment

Study on Comprehensive Performance of Three-Dimensional Tube Applied to Gas–Solid Two-Phase Flow Environment

Determination of Pressure Drop Correlation for Air Flow through Packed Bed of Sinter Particles in Terms of Euler Number

Different tube bundles effect on the shell-and-tube heat exchanger performance

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