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Performance study on a cryogenic bubble pump for low-flow-rate liquid nitrogen transfer.

Author(s) : CHEN Y., XU Y., SUN D., WANG Z., SHEN Q.

Type of article: IJR article

Summary

To develop a cryogenic liquid pumping device suitable for low-flow-rate conditions, this paper presents a combined numerical and experimental investigation of a bubble pump using liquid nitrogen as the working fluid. The pump performance and internal hydrodynamic characteristics are systematically examined through varying submergence ratio and heating power. The results show that under the same heating power, as the submergence ratio increases, both the flow rate and lifting efficiency exhibit a trend of first increasing and then decreasing. At the same submergence ratio, an increase in heating power leads to a first rise followed by a fall in the flow rate, while the lifting efficiency decreases gradually. The maximum flow rate of 11.14 kg × h-1 occurs at a submersion ratio of 0.62 and a heating power of 35 W in the simulation. The maximum measured flow rate was 4.24 kg × h-1 at a submersion ratio of 0.473 and a heating power of 7 W. This research shows the prospect of cryogenic bubble pump in the field of low-flow-rate cryogenic liquid transfer, and provides the research foundation for the design and optimization of the cryogenic bubble pump.

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Pages: 11 p.

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Details

  • Original title: Performance study on a cryogenic bubble pump for low-flow-rate liquid nitrogen transfer.
  • Record ID : 30034607
  • Languages: English
  • Subject: Technology
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 184
  • Publication date: 2026/04
  • DOI: http://dx.doi.org/https://doi.org/10.1016/j.ijrefrig.2026.01.030

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