Stirling Refrigerating Machine Modeling Using Schmidt and Finite Physical Dimensions Thermodynamic Models: A Comparison with Experiments - Université Paris Nanterre
Journal Articles Entropy Year : 2021

Stirling Refrigerating Machine Modeling Using Schmidt and Finite Physical Dimensions Thermodynamic Models: A Comparison with Experiments

Cătălina Dobre
Laboratoire Energétique Mécanique Electromagnétisme
Lavinia Grosu
Alexandru Dobrovicescu
University Politehnica of Bucharest [Romania]
Georgiana Chişiu
  • Function : Author
Mihaela Constantin

Abstract

The purpose of the study is to show that two simple models that take into account only the irreversibility due to temperature difference in the heat exchangers and imperfect regeneration are able to indicate refrigerating machine behavior. In the present paper, the finite physical dimensions thermodynamics (FPDT) method and 0-D modeling using the Schmidt model with imperfect regeneration were applied in the study of a β type Stirling refrigeration machine.The 0-D modeling is improved by including the irreversibility caused by imperfect regeneration and the finite temperature difference between the gas and the heat exchangers wall. A flowchart of the Stirling refrigerator exergy balance is presented to show the internal and external irreversibilities. It is found that the irreversibility at the regenerator level is more important than that at the heat exchangers level. The energies exchanged by the working gas are expressed according to the practical parameters, necessary for the engineer during the entire project. The results of the two thermodynamic models are presented in comparison with the experimental results, which leads to validation of the proposed FPDT model for the functional and constructive parameters of the studied refrigerating machine.

Domains

High Energy Physics - Phenomenology [hep-ph]

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https://hal.parisnanterre.fr/hal-04129996

Submitted on : Thursday, June 15, 2023-4:31:13 PM

Last modification on : Friday, April 26, 2024-4:26:03 PM

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Dates and versions

hal-04129996 , version 1 (15-06-2023)

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Cătălina Dobre, Lavinia Grosu, Alexandru Dobrovicescu, Georgiana Chişiu, Mihaela Constantin. Stirling Refrigerating Machine Modeling Using Schmidt and Finite Physical Dimensions Thermodynamic Models: A Comparison with Experiments. Entropy, 2021, 23 (3), pp.368. ⟨10.3390/E23030368⟩. ⟨hal-04129996⟩

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