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Numerical assessment of the dynamic behavior of a solar-driven jet-ejector refrigeration system equipped with an adjustable jet-ejector.

Author(s) : GALINDO J., DOLZ V., TISEIRA A., PONCE-MORA A.

Type of article: IJR article

Summary

In the present paper, the mid-term performance of two different architectures of a solar-driven jet-ejector refrigeration system is numerically compared: the first one is fitted with a fixed-geometry jet-ejector while the second one is equipped with an adjustable spindle that modifies the jet-ejector area ratio. The jet-ejector behavior has been predicted with a validated computational fluid dynamics approach and the dynamic response of the overall system accounts for transient effects in a small parabolic trough collector and a hot thermal storage tank. The investigation shows that the adjustable jet-ejector allows for continuous and smooth operation in a much wider range of outdoor conditions. Additionally, it enables more efficient management of the thermal level in the hot storage system. As a result, the adjustable refrigeration system improves the performance indicators in all the warm months of the typical meteorological year under evaluation. The maximum improvement potential is found in May; the fixed-geometry system provides an average of 0.34 while the adjustable system reaches an average of 0.48 considering the same boundary conditions in both cases.

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Pages: 168-182

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Details

  • Original title: Numerical assessment of the dynamic behavior of a solar-driven jet-ejector refrigeration system equipped with an adjustable jet-ejector.
  • Record ID : 30028024
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 121
  • Publication date: 2021/01
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2020.10.019

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