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A dry ice slurry system for low temperature refrigeration.

Author(s) : PETTERSEN J., JAKOBSEN A.

Summary

The paper describes a CO2 vapour compression process using a slurry of sublimating dry ice particles in a heat-transfer liquid to provide refrigeration below the triple point temperature (-56.6 deg c). The slurry is generated by throttling of liquid of liquid CO2 into a separator vessel and circulated to the air coolers by pumping of gravity. Vapour from throttling and sublimation is recondensed in an ordinary CO2 vapour compression circuit. Use of latent heat gives small tube dimensions and good temeprature stability. The efficiency is competitive due to low pump work and direct-contact heat transfer. Preliminary results from testing of a laboratory model are presented and discussed. This test rig consists of an electrically heated tube with pump circulation of the slurry and CO2 supply from a storage cylinder. Practical experience with the test system is discussed, and suggestions are made for full-scale system design.

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Details

  • Original title: A dry ice slurry system for low temperature refrigeration.
  • Record ID : 1996-2784
  • Languages: English
  • Source: Refrigeration in Sea Transport - Today and in the Future
  • Publication date: 1997
  • Document available for consultation in the library of the IIR headquarters only.

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