Evaluation of the Efficiency of Heat Exchanger Channels with Different Flow Turbulence Methods Using the Entropy Generation Minimization Criterion
This paper presents the results of an optimization analysis of two types of thermal fluid channels. The selected geometries were evaluated according to the criterion of the Entropy Generation Minimization method as suggested by Adrian Bejan, with reference to a smooth pipe of the same diameter. The...
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2024-12-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/18/1/132 |
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| author | Piotr Bogusław Jasiński Grzegorz Górecki Zbigniew Cebulski |
| author_facet | Piotr Bogusław Jasiński Grzegorz Górecki Zbigniew Cebulski |
| author_sort | Piotr Bogusław Jasiński |
| collection | DOAJ |
| description | This paper presents the results of an optimization analysis of two types of thermal fluid channels. The selected geometries were evaluated according to the criterion of the Entropy Generation Minimization method as suggested by Adrian Bejan, with reference to a smooth pipe of the same diameter. The aim of this research was to assess the effectiveness of two channels that intensify heat transfer in different ways: with an insert (disrupting the flow in the pipe core) and with internal fins (disrupting the flow at the pipe wall), and to compare the results using the same criterion: the EGM method. The tested insert consisted of spaced streamline-shaped flow turbulizing the elements fixed in the axis of the pipe and spaced at equal distances from each other. The second channel was formed by making a right-angled triangle (rib profile) on the deformation of the pipe wall perimeter. Using computer modeling, the effect of the two geometric parameters of the above-mentioned channels on the flux of entropy generated was studied. These are (a) the diameter of the disturbing element (“droplet”) and the distance between these elements for a channel with a turbulent insert, and (b) the height of the rib and the longitudinal distance between them for a finned channel. The novelty resulting from the research is the discovery that the turbulization of the flow in the pipe wall boundary layer generates significantly less irreversible entropy than the disturbance of the flow in the pipe axis by the insert. |
| format | Article |
| id | doaj-art-9cf3e05397f7473683585d5146dce223 |
| institution | Kabale University |
| issn | 1996-1073 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj-art-9cf3e05397f7473683585d5146dce2232025-01-10T13:17:11ZengMDPI AGEnergies1996-10732024-12-0118113210.3390/en18010132Evaluation of the Efficiency of Heat Exchanger Channels with Different Flow Turbulence Methods Using the Entropy Generation Minimization CriterionPiotr Bogusław Jasiński0Grzegorz Górecki1Zbigniew Cebulski2Institute of Turbomachinery, Lodz University of Technology, Wólczańska Str. 217/221, 93-005 Łódź, PolandInstitute of Turbomachinery, Lodz University of Technology, Wólczańska Str. 217/221, 93-005 Łódź, PolandInstitute of Turbomachinery, Lodz University of Technology, Wólczańska Str. 217/221, 93-005 Łódź, PolandThis paper presents the results of an optimization analysis of two types of thermal fluid channels. The selected geometries were evaluated according to the criterion of the Entropy Generation Minimization method as suggested by Adrian Bejan, with reference to a smooth pipe of the same diameter. The aim of this research was to assess the effectiveness of two channels that intensify heat transfer in different ways: with an insert (disrupting the flow in the pipe core) and with internal fins (disrupting the flow at the pipe wall), and to compare the results using the same criterion: the EGM method. The tested insert consisted of spaced streamline-shaped flow turbulizing the elements fixed in the axis of the pipe and spaced at equal distances from each other. The second channel was formed by making a right-angled triangle (rib profile) on the deformation of the pipe wall perimeter. Using computer modeling, the effect of the two geometric parameters of the above-mentioned channels on the flux of entropy generated was studied. These are (a) the diameter of the disturbing element (“droplet”) and the distance between these elements for a channel with a turbulent insert, and (b) the height of the rib and the longitudinal distance between them for a finned channel. The novelty resulting from the research is the discovery that the turbulization of the flow in the pipe wall boundary layer generates significantly less irreversible entropy than the disturbance of the flow in the pipe axis by the insert.https://www.mdpi.com/1996-1073/18/1/132heat transfer enhancementheat exchangernumerical simulationEntropy Generation MinimizationEGM |
| spellingShingle | Piotr Bogusław Jasiński Grzegorz Górecki Zbigniew Cebulski Evaluation of the Efficiency of Heat Exchanger Channels with Different Flow Turbulence Methods Using the Entropy Generation Minimization Criterion Energies heat transfer enhancement heat exchanger numerical simulation Entropy Generation Minimization EGM |
| title | Evaluation of the Efficiency of Heat Exchanger Channels with Different Flow Turbulence Methods Using the Entropy Generation Minimization Criterion |
| title_full | Evaluation of the Efficiency of Heat Exchanger Channels with Different Flow Turbulence Methods Using the Entropy Generation Minimization Criterion |
| title_fullStr | Evaluation of the Efficiency of Heat Exchanger Channels with Different Flow Turbulence Methods Using the Entropy Generation Minimization Criterion |
| title_full_unstemmed | Evaluation of the Efficiency of Heat Exchanger Channels with Different Flow Turbulence Methods Using the Entropy Generation Minimization Criterion |
| title_short | Evaluation of the Efficiency of Heat Exchanger Channels with Different Flow Turbulence Methods Using the Entropy Generation Minimization Criterion |
| title_sort | evaluation of the efficiency of heat exchanger channels with different flow turbulence methods using the entropy generation minimization criterion |
| topic | heat transfer enhancement heat exchanger numerical simulation Entropy Generation Minimization EGM |
| url | https://www.mdpi.com/1996-1073/18/1/132 |
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