Second law analysis of curved rectangular channels

Guo, Jiangfeng; Xu, Mingtian; Cheng, Lin

doi:10.1016/j.ijthermalsci.2010.12.011

Cited by 49 publications

(11 citation statements)

References 34 publications

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“…Guo et al [18] numerically studied the entropy generation of the curved, rectangular channels in laminar flow. For the channels with the same cross section, the Nusselt number increased significantly as the curvature ratio increased at the expense of a slight increase in pressure drop.…”

Section: Introductionmentioning

confidence: 99%

Mathematical Model for Predicting the Heat Transfer Characteristics of a Helical-Coiled, Crimped, Spiral, Finned-Tube Heat Exchanger

Boonsri

2015

Heat Transfer Engineering

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This paper is a continuation of the authors' previous work. Theoretical and experimental studies of the heat transfer characteristics of a helical-coiled, crimped, spiral, finned-tube heat exchanger in dry surface conditions are presented. The test section is a helical-coiled, finned-tube heat exchanger. The coil unit is composed of four concentric helical-coiled tubes of different diameters. All tubes are constructed by bending straight copper tube into seven layers of helical coil. Aluminum crimped spiral fins, with an outer diameter of 28.25 mm and a thickness of 0.5 mm, are connected around the tube. Hot water is used as a working fluid for the tube side, while ambient air is used for the shell side. The test runs are done at air mass flow rates ranging between 0.04 and 0.13 kg/s. The water mass flow rates are between 0.2 and 0.4 kg/s. The water temperatures are between 40 and 50 • C. A mathematical model is developed and the simulation results show reasonable agreement with the experimental data.

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Section: Introductionmentioning

confidence: 99%

Mathematical Model for Predicting the Heat Transfer Characteristics of a Helical-Coiled, Crimped, Spiral, Finned-Tube Heat Exchanger

Boonsri

2015

Heat Transfer Engineering

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“…They used such a method to see field response against perturbation and discovered that while for low flow rate system is confidently stable against perturbation it will turn into periodic and even chaotic behaviours for higher flow rates. Guo et al [22] used a laminar incompressible three-dimensional numerical model to explore the interactive effects of geometrical and flow characteristic on heat transfer and pressure drop. They applied entropy generation as a hydrothermal criterion and reported the influence of Reynolds number and curvature ratio on the flow profile and Nusselt number.…”

Section: Introductionmentioning

confidence: 99%

Vortex structure-based analysis of laminar flow behaviour and thermal characteristics in curved ducts

Chandratilleke

Nadim

Narayanaswamy

2012

International Journal of Thermal Sciences

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“…In developing improved models, Guo et al [15] considered laminar incompressible flow and formulated a three-dimensional simulation to explore the interactive behaviour of geometrical and flow parameters on heat transfer and pressure drop. Using flow entropy for hydrothermal assessment, they reported the influence from Reynolds number and curvature ratio on the flow profile and Nusselt number.…”

Section:    mentioning

confidence: 99%