A comparative study of elliptical and circular sections in one- and two-row tubes and plate fin heat exchangers

Rocha, Luíz Alberto Oliveira; Saboya, F. E. M.; Vargas, José Viriato Coelho

doi:10.1016/s0142-727x(96)00063-x

Cited by 102 publications

(33 citation statements)

References 7 publications

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“…Determination of local and overall heat transfer coefficients is conducted by Rosman et al [7]. Rocha et al [8] analyzed plate fin heat exchangers with circular and elliptical tubes and determined heat transfer coefficients, experimentally. Kundu and Das [9] determined optimum dimensions of a plate fin and tube heat exchanger for both rectangular and equilateral triangular array of tubes.…”

Section: Introductionmentioning

confidence: 99%

Effect of geometrical parameters on heat transfer and pressure drop characteristics of plate fin and tube heat exchangers

Erek

Özerdem

Bilir

et al. 2005

Applied Thermal Engineering

101

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In this study, the influences of the changes in fin geometry on heat transfer and pressure drop of a plate fin and tube heat exchanger are investigated, numerically. A computational fluid dynamics (CFD) program called Fluent is used in the analysis. The segment of one tenth of fin is used in the modeling, due to symmetrical condition. The results of heat transfer, static, and total pressure drop values of ten different fins are tabulated and the normalized values of them are, also, given for the comparison of the models. The distance between fins is found to have a considerable effect on pressure drop. It is observed that placing the fin tube at downstream region affects heat transfer positively. Another important result of the study is that increasing ellipticity of the fin tube increases the heat transfer while it, also, results in an important reduction in pressure drop.

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Section: Introductionmentioning

confidence: 99%

Effect of geometrical parameters on heat transfer and pressure drop characteristics of plate fin and tube heat exchangers

Erek

Özerdem

Bilir

et al. 2005

Applied Thermal Engineering

101

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“…In comparison with a circular one, an elliptic cylinder provides enhanced heat transfer area at the same volume. Studies confirm that this kind of exchange enables improved heat transfer characteristics without excessive pressure drop penalty [1]. Numerical and experimental efforts have been made toward obtaining temperature and/or heat transfer around the elliptic cylinder.…”

Section: Introductionmentioning

confidence: 89%

Temperature Measurement of An Inclined Cylinder Using Optical Interferometry

Zhu¹,

Dai²,

Cheng³

et al. 2015

Advances in Intelligent Systems Research

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Abstract-Temperature profile of an inclined elliptic cylinder is studied experimentally using optical interferometry. Interferograms of the elliptical cylinder with an isothermal surface were recorded by He-Ne laser. The cylinder were placed with its major axis inclined 30° with respect to the horizontal. Temperature profile around the cylinder was quantitatively reconstructed from the locations of fringe center. The influence of the inclination on the temperature profile around the cylinder was discussed. The results reveal that no symmetry can be found from the obtained interferogram. Optical interferometry is successfully developed to measure the temperature profile around an elliptic cylinder.

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“…For the laminar regime, the Nusselt number is obtained from Equation (7) and the Darcy-Weisbach friction factor from Equation (16). Combining Equations (7), (16), (19) and (20) yields:…”

Section: Pumping Power For Fluid Flow and Hydrodynamic Considerationsmentioning

confidence: 99%

“…A correctly-operated system, while important, provides no assurance that energy savings will be attained if the system is not properly designed [4]. Therefore, design optimization becomes increasingly important and has been under extensive study during the past twenty years [4,6,7,16,17].…”

Section: Introductionmentioning

confidence: 99%

An analytical approach for optimal design of heat sinks under forced convection

Miguel

2013

Open Engineering

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Saving energy is just as important as generating energy. In this paper, we seek an optimized structure that achieves a certain level of heat transfer rate under a minimum pumping power to drive the fluid stream. Constraints are specified by the flow regime (laminar and turbulent), admissible boundary conditions on the walls (prescribed temperature and constant heat flux), and design standards. The study will help designers with more effective basic tools for the conceptual design of system and in establishing proper operating procedures.

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A comparative study of elliptical and circular sections in one- and two-row tubes and plate fin heat exchangers

Cited by 102 publications

References 7 publications

Effect of geometrical parameters on heat transfer and pressure drop characteristics of plate fin and tube heat exchangers

Effect of geometrical parameters on heat transfer and pressure drop characteristics of plate fin and tube heat exchangers

Temperature Measurement of An Inclined Cylinder Using Optical Interferometry

An analytical approach for optimal design of heat sinks under forced convection

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