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Comparison and validation of one-dimensional models of ejector expansion transcritical carbon dioxide refrigeration cycle.

Number: 0138

Author(s) : YOU C., MICHEL B., REVELLIN R.

Summary

One-dimensional homogeneous equilibrium models of ejector in a transcritical carbon dioxide refrigeration system are commonly proposed by various scholars in the theoretical research. However, for different one-dimensional models, there is no comprehensive summary of their simulation accuracy and applicability conditions. In this paper, two representative one-dimensional models from the literature were validated and compared using two groups of independent experimental data sets. Both one-dimensional models predicted accurately the ejector outlet pressure and vapor quality. However, an imbalance of the liquid mass exists between the ejector outlet and the separator outlet during the actual operation. In that situation, the simulated values for the entrainment ratio and coefficient of performance show considerable discrepancies from the experimental data. This paper presented a comparative analysis and validation of two different 1-
D models using independent experimental data. The effect of system operating state on the accuracy of onedimensional models was quantitatively analyzed, which offered orientations for subsequent optimization of one-dimensional models and improvement of actual operating transcritical carbon dioxide refrigeration systems.

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Pages: 11 p.

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Details

  • Original title: Comparison and validation of one-dimensional models of ejector expansion transcritical carbon dioxide refrigeration cycle.
  • Record ID : 30029734
  • Languages: English
  • Subject: Technology
  • Source: 15th IIR-Gustav Lorentzen Conference on Natural Refrigerants (GL2022). Proceedings. Trondheim, Norway, June 13-15th 2022.
  • Publication date: 2022/06/13
  • DOI: http://dx.doi.org/10.18462/iir.gl2022.0138
  • Document available for consultation in the library of the IIR headquarters only.

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