Optimization of Radiating Fin Arrays With Respect to Weight

Schnurr, N.M.; Shapiro, A.B.; Townsend, Mardie

doi:10.1115/1.3450613

Cited by 32 publications

(5 citation statements)

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“…The integration constants C 1 and C 2 determined using the boundary conditions are given by equations ( 10) and (11) and substituted into equation (25). After some mathematical manipulations, the temperature distribution is obtained as…”

Section: Variation Of Parameters Methods For Nonlinear Problemsmentioning

confidence: 99%

“…It was considered as mutual irradiation and was observed that this had an important overall effect on the overall heat exchange process. Schnurr et al 11 used a nonlinear optimization approach to determine the minimum mass design for radiating finned arrays used in space. It was explained with two numerical examples that for specified values of heat transfer rate, base cylinder surface temperature, and thermal properties of fin material, minimum weight can be used to design fin arrays.…”

Section: Introductionmentioning

confidence: 99%

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Performance analysis and optimization of a radiating fin array

Solak

Arslantürk

2022

Proceedings of the Institution of Mechanical Engineers, Part G:

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Space radiators are used to reject waste heat from power units, electronic devices, and various equipment in space vehicles. It is important that radiators can achieve the heat desired to be dissipated into space with the least mass. With a view to ensuring this aim, the heat transfer calculations that must be performed must be highly accurate. Therefore, the variation of conductivity with temperature should also be taken into account in the mathematical model. This paper presents heat transfer performance and optimization of a fin array consisting of straight fins put axially on a tube and radiating heat into deep space. The mathematical model yields the governing equation as a highly nonlinear integro-differential equation which is solved by the variation of parameters method (VPM). By applying an appropriate optimization procedure, the conduction–radiation parameter, Nc, providing maximum heat transfer is obtained for a given fixed fin profile emissivity, ε, opening angle among the fins, γ, and thermal conductivity parameter describing the variation of thermal conductivity, β. For the range of suitable problem parameters, optimum values of the dimensionless conduction–radiation parameter Nc, which is a combination of thermal and geometric quantities, are expressed in ε and γ for a given β. The correlation equations are expected to provide remarkable benefits to the designer.

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Section: Variation Of Parameters Methods For Nonlinear Problemsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Performance analysis and optimization of a radiating fin array

Solak

Arslantürk

2022

Proceedings of the Institution of Mechanical Engineers, Part G:

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“…It was also noted that the radiation heat transfer is proportional to the cube root of the thermal conductivity to density ratio. Schnurr et al [16] similarly compared the effects of tapering circular fins along an annular heat pipe and found that increases in performance could be achieved. A minimum mass design for longitudinal fins extending from a flat base or cylinder was investigated by Chung and Zhang [17,18].…”

Section: Introductionmentioning

confidence: 95%

Radiant Fin Performance Using Fractal-like Geometries

Dannelley

Baker

2013

Journal of Heat Transfer

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The results of a computational study into the thermal peiformance of thermally radiating fractal-like fins are presented. Previous experimental studies have shown that fractal patterns increase the heat transfer surface area while simultaneously reducing mass. Two fractal patterns were used for comparison, the modified Koch snowflake and the Sierpinski carpet. For an isothermal base fin radiating to free space, the fin effectiveness and fin efficiency are presented for the zeroth and first four fractal iterations in otder to quantify the performance. Emissivity, width/thickness ratio, base temperature, and fin material were varied to better understand their impact on the peiformance of fractal-like fins. Based upon the observed results, fractal-like fins greatly improve the fin effectiveness per unit mass. In certain cases, fin effectiveness per unit mass was found to increase by up to 46%. As the cost of access to space is significant, this reduction in mass could lead to savings for spacecraft thermal management applications.

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“…Besides, Love and Francis [5] analyzed longitudinal radiating fins equally spaced around a cylindrical heat source, while Eslinger and Chung [6] presented a finite element solution for the heat transfer from a radiating and convecting fin or fin arrays. Schnurr et al [7] optimized the radiating fin arrays with respect to weight. Here, a non linear optimization approach was used to determine the minimum weight design for radiating fin arrays used in space applications and the analysis were brought out.…”

Section: Introductionmentioning

confidence: 99%

Analytical Investigations of Thermo-Geometrical Parameters Effects on Heat Transfer and Performance of Longitudinal Radiating Fin

Ogunmola¹

2014

IJEPE

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In this work, analytical models are developed for determining temperature distribution, heat transfer and the efficiency of radiating fin. The developed models are used to investigate the effects of various thermo-geometric properties on the temperature distribution and consequently on the performance of the radiating fin. The effects of fin tip conditions on the thermal performance of the fin are also examined. From the results, it is shown that the variation in the thermogeometric parameters (fin tip Biot number, modified Biot number and efficiency) of the fin has pronounced effects on the temperature distribution and consequently on the performance of the fin especially when a large temperature difference exists between the prime surface and the environment. The results obtained in this study serve as basis for determining the level of accuracy of any other approximation method use in the analysis of the problem and also, it could be used to improve the design of radiating fin in heat transfer equipment.

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Optimization of Radiating Fin Arrays With Respect to Weight

Cited by 32 publications

References 0 publications

Performance analysis and optimization of a radiating fin array

Performance analysis and optimization of a radiating fin array

Radiant Fin Performance Using Fractal-like Geometries

Analytical Investigations of Thermo-Geometrical Parameters Effects on Heat Transfer and Performance of Longitudinal Radiating Fin

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