Experimental and numerical study on the optimal fin numbering in an external extended finned tube heat exchanger

Sajedi, R.; Taghilou, Mohammad; Jafari, Moharram

doi:10.1016/j.applthermaleng.2014.12.040

Cited by 23 publications

(4 citation statements)

References 17 publications

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“…Their research included a comprehensive empirical and numerical study of the effect of interrupting fins and the longitudinal distance of two fins on heat transfer. Sajedi et al [6] examined the optimal number of longitudinal fins in a vertical cylindrical heat exchanger. The temperature distribution of the heat exchanger and the total heat transfer indicate the optimal number of fins to increase the heat transfer.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity Analysis on Thermal Performance of Gas Heater with Finned and Finless Tubes using Characteristics-based Method

Razavi

Adibi

Hassanpour

2021

IJE

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Natural gas must be preheated to prevent phase change and gas hydrate in pressure reduction stations. This paper aims to investigate the effect of the fins of gas tubes and their configuration, arrangement, and shape on the heat transfer and thermal efficiency of gas. To conduct a parametric study, two tube cases with fins and without fins, and in the finned case for the fin's configuration, two longitudinal and circular arrangements, and the formation of the fins, two solid and interrupted forms were analyzed. Also, three types of cross-sections, including rectangular, convergent parabolic, and divergent parabolic, for the shape of the fins have been studied. For this simulation, the three-dimensional, incompressible, and steady flow was considered, and for analysis and discretization of convective heat equations, the characteristic-based method was applied. FORTRAN software was also used to implement and solve the equations. The results show that in solid and interrupted fins and increasing the number of fins in parallel, the dimensionless heat transfer coefficient increases. Also, the dimensional heat transfer coefficient decreases with increasing the ratio of fin height to the tube's diameter. Also, the most significant heat transfer improvement was related to the divergent parabolic cross-section.

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Section: Introductionmentioning

confidence: 99%

Sensitivity Analysis on Thermal Performance of Gas Heater with Finned and Finless Tubes using Characteristics-based Method

Razavi

Adibi

Hassanpour

2021

IJE

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“…Typically, in the water tube banks, there were so many water tubes whose size is narrow and small, which leads to the large resistance of water [4][5][6][7]. Besides, it usually has several rows of fined tubes.…”

Section: Introductionmentioning

confidence: 99%

Structural parameters study on stainless-steel flat-tube heat exchangers with corrugated fins

Gao

Wang²,

Cui

2020

THERM SCI

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A stainless steel corrugated fins and flat-tube heat exchanger is designed, which has a plate-fin structure. To optimize the structural parameters of this exchanger, including corrugation angle, corrugation pitch and fin length, 3-D simulation model and test were proposed. The numerical results indicated that the corrugation angle significantly affects both on heat transfer performance and pressure drop. The fin with angle, A = 0~20°, have demonstrated the higher heat transfer efficiency, lesser gas condensation, lower pressure drop, higher outlet flue gas temperature in low T region, and no exceeding the distortion temperature in high T region. Corrugation pitch and fin length influence thermal and hydraulic characteristics, outlet flue gas temperature, and fin temperature. To improve heat transfer performance, and reduce the fin temperature in high T region and ease gas condensation in low T region, smaller corrugation pitch and shorter fin length were recommended in the low T region, whereas higher values were more reasonable in high T region. Noticeably, the heat transfer and flow characteristics were better in the high T region than the low T region. Therefore, higher priority should be given to the structural optimization in the high T region in order to increase the heat transfer enhancement.

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“…Considering that an automotive radiator is an important part of the car cooling system, the fin-and-tube heat exchanger is often the subject of research. Many experimental and numerical methods have been proposed to obtain the heat transfer and fluid flow characteristics of fin-and-tube heat exchangers [4][5][6][7]. L.H.…”

Section: Introductionmentioning

confidence: 99%

Thermal and Fluid Dynamic Analysis of Compact Fin-and-Tube Heat Exchangers for Automotive Applications

et al. 2018

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Flat tubes heat exchangers are commonly used in many industrial applications as a consequence of the distinctive geometrical characteristics of the flat tube compared with round tube. This paper aims to investigate the flow and heat transfer characteristics of laminar cross-flow forced convection in compact fin-and-flat tube heat exchangers. The experiment was performed to explore the influence of the tube inclination angle on the thermal hydraulic performance of the flat tube heat exchanger. Four flat tubes arranged in two aligned rows having the same longitudinal and transverse pitches have been examined in the range of Reynolds number between 1768.27 and 2259.46. A constant heat flux of 4169.63 W/m2 was applied at the inner surface of each flat tube. On the other hand, the numerical simulation is solved by ANSYS FLUENT for a two dimensional model with unstructured mesh and the results are compared against the experimental results. The numerical simulation results indicate that the average Nusselt number increased by 78.24 % for Reynolds number 1768.27. Besides that, for Reynolds number 1964.75 and 2259.46 the Nusselt numbers were increased by 75.89 % and 54.49%, respectively, compared to experimental results. Moreover, the pressure drop is increased 25 % and 83.38 % for both experimental and numerical simulation with respect to three Reynolds number. It was found that, the tube with 30° degree provides the higher heat transfer with Reynolds number 2259.46. This study could assist engineers in decisions regarding the application of compact fin-and-tube heat exchangers in the automotive field.

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Experimental and numerical study on the optimal fin numbering in an external extended finned tube heat exchanger

Cited by 23 publications

References 17 publications

Sensitivity Analysis on Thermal Performance of Gas Heater with Finned and Finless Tubes using Characteristics-based Method

Sensitivity Analysis on Thermal Performance of Gas Heater with Finned and Finless Tubes using Characteristics-based Method

Structural parameters study on stainless-steel flat-tube heat exchangers with corrugated fins

Thermal and Fluid Dynamic Analysis of Compact Fin-and-Tube Heat Exchangers for Automotive Applications

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