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Vacuum-evaporative refrigeration and ice generation installations.

Author(s) : MARINUK B., KRYSANOV K., ERMOLAEV A.

Summary

Recently, a lot of attention is being paid in refrigeration engineering to the problem of alternative refrigerants as substitutes of refrigerants that destroy the ozone layer and cause global warming. Some refrigerants suggested for this purpose, namely R-134a and R-125, are badly compatible with existing refrigerating machines and oil lubricants; they are expensive and have global warming potentials. As a result, the role of such natural substances such as water and water solutions is increasingly important. All such substances are low pressure ones and have a great volume of vapour under pressure of 1-25 mm Hg, so they can't operate with usual refrigeration compressors. A vacuum-evaporative refrigeration installation was developed at the Department of Refrigeration of Moscow State University of Engineering Ecology. It can cool down liquids such as water, water-containing liquids from the warm state down to 0°C. Also, it is possible to freeze water to the ice state and turn it into slurry. This installation consists of the main vacuum pump with at high speed pumping, the auxiliary vacuum pump of oil type, the shell and the tube condenser and the evaporator. The manner of operation of the installation is given, as well as some results of test and theoretical analysis of the process are discussed.

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Pages: ICR07-B2-60

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Details

  • Original title: Vacuum-evaporative refrigeration and ice generation installations.
  • Record ID : 2007-2611
  • Languages: English
  • Source: ICR 2007. Refrigeration Creates the Future. Proceedings of the 22nd IIR International Congress of Refrigeration.
  • Publication date: 2007/08/21

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