Inverse determination of the heat transfer characteristics on a circular plane fin in a finned-tube bundle

Benmachiche, Abdelmoumène Hakim; Bougriou, Chérif; Abboudi, Saïd

doi:10.1007/s00231-010-0664-9

Cited by 16 publications

(3 citation statements)

References 18 publications

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“…Fins spacing effect on the heat transfer and pressure drop were investigated. Benmachiche et al 15 used the conjugate gradient method to investigate the heat transfer coefficient from a bundle of circular‐finned tubes for inline and staggered arrangement. Reynolds number range was (2 × 10 3 –3 × 10 4 ).…”

Section: Introductionmentioning

confidence: 99%

Constructal design of crossflow heat exchanger with concentric and eccentric circular fins

Mustafa,

Sulaiman,

Awad

2023

Heat Trans

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A single‐row crossflow heat exchanger with concentric and eccentric circular fins is designed and shown in this paper using a constructal design approach. The transverse fins spacing, the spanwise fins spacing, and the fin‐tube eccentricity are varied inside a fixed volume. In addition to the concentric case (ε = 0), two tube‐fin eccentricities are considered with (ε = ±0.25). The (heat transfer/volume) heat density is to be optimized with respect to the transverse and the spanwise spacing. The height and the width of the heat exchanger occupation space in addition to the fin diameter are fixed as design constraints. The crossflow is motivated by constant pressure drop with two dimensionless pressure drop numbers (Bejan number) (Be = 103 and 105). Both the fins and the tubes are maintained at a constant temperature, and they are cooled by the cross air of ambient temperature. The ratio of the fin to tube diameter is kept at 0.5. Three‐dimensional equations for conservation of mass, conservation of momentum, and conservation of energy are solved using finite volume method for incompressible and steady flows. The heat density for concentric fins (ε = 0) and eccentric fins (ε = ±0.25) is maximized two times, one with respect to transverse spacing, and the other with respect to spanwise spacing at Bejan numbers (Be = 103 and 105). The highest double‐maximized heat density is attained at the fin eccentricity (ε = 0.25). The increase in the double maximized heat density when the fin eccentricity (ε = 0.25) is 7.65% for Be = 103, and it is 12% for Be = 105.

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Section: Introductionmentioning

confidence: 99%

Constructal design of crossflow heat exchanger with concentric and eccentric circular fins

Mustafa,

Sulaiman,

Awad

2023

Heat Trans

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“…One of the methods most frequently used to calculate these coefficients is the inverse problems of heat conduction. The local heat transfer coefficient over finned-tube heat exchangers were ascertained by Hung et al [20] and Benmachiche et al [21] using the conjugate gradient approach, which is based on the inversed algorithm scheme. The convective heat transfer coefficient in SAHs have been the subject of more investigation.…”

Section: Introductionmentioning

confidence: 99%

Thermal Performance of Double Pass Solar Air Collector: Numerical and Experimental Investigation

Belloufi,

Rouag,

Aissaoui

et al. 2023

Annals of West University of Timisoara - Physics

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In this research study, the development of a theoretical model to estimate the efficiency of a double pass solar air heater (DPSAH) was the main objective. The mathematical model was compared to experimental results and found to be in agreement, both qualitatively and quantitatively. The model used energy balance equations to determine the outlet temperature and could solve the temperature equations of each component of the heater simultaneously. A matrix inversion method was used for this purpose. The study found that increasing the Nusselt number led to an increase in energy efficiency, but also caused a drop in outlet temperature at any solar radiation. The mass flow rate (MFR), with larger flow rates resulting in better efficiencies, had a significant impact on the double pass air heater’s efficiency. Thus, increasing of DPSAH’s length increases its thermal performances and reach its maximum values for L=9m. These findings could be beneficial in selecting the most efficient design parameters for DPSAH.

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“…The inverse problems of heat conduction are among the most widely used to determine these coefficients. Huang et al [18] and Benmachiche et al [19] applied the conjugate gradient method, which is based on an inverse algorithm scheme, to estimate the local heat transfer coefficients over finned-tube heat exchangers. Ay et al [20] presented a local study of the heat transfer coefficient over the plate fin inside heat exchangers.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Theoretical Analysis on Thermal Performance of the Flat Plate Solar Air Collector

Aissaoui¹,

Benmachiche²,

Brima³

et al. 2016

IJHT

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Experimental and Theoretical investigation is presented to simulate the heat transfer in flat-plate single pass solar air collector working in forced convection. The complexity of the mathematical models of these phenomena has led researchers to conduct studies related to this field based on several simplifying assumptions, such as, the convective heat transfer coefficient is considered as constant. In this research work, initially, an experimental study is performed using thermocouples to measure temperature distributions on solar air heater components. The different measured temperatures of the absorber plate, air flow and bottom plate are used to determine the local convective heat transfer coefficients. Secondly, the problem is treated numerically by a developed FORTRAN code to calculate, for different solar radiation intensity, the temperature variations in each solar air panel components. Satisfactory qualitative and quantitative agreement is obtained between the numerical and experimental results.

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Inverse determination of the heat transfer characteristics on a circular plane fin in a finned-tube bundle

Cited by 16 publications

References 18 publications

Constructal design of crossflow heat exchanger with concentric and eccentric circular fins

Constructal design of crossflow heat exchanger with concentric and eccentric circular fins

Thermal Performance of Double Pass Solar Air Collector: Numerical and Experimental Investigation

Experimental and Theoretical Analysis on Thermal Performance of the Flat Plate Solar Air Collector

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