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Development of a novel hydrate-based refrigeration system: a preliminary overview.

Author(s) : OGAWA T., ITO T., WATANABE K., et al.

Type of article: Article

Summary

This paper gives a preliminary overview of the authors attempt at developing a hydrate-based refrigeration system based on a novel conceptual design. The system forms a closed cycle, which is more or less analogous to the conventional vapour-compression refrigeration cycle. The cycle of present interest is performed by a multiphase refrigerant, which is typically a mixture of one or two hydrate-forming substances and water. The refrigerant is required to form a hydrate at a temperature as high as plus or minus 30°C or above, desirably under a modest pressure, such that the heat released by the exothermic hydrate formation can be efficiently removed by an environmental fluid such as the atmospheric air, groundwater or river water. The hydrate slurry thus formed is depressurized to dissociate at a lower temperature, typically 5-9°C, thereby absorbing heat from a space to be refrigerated. To confirm the feasibility of the above conceptual design of the hydrate-based refrigeration system, a thermodynamic analysis of the system and a simulation of its operation have been performed. Also a laboratory-scale refrigerator based on the above design was constructed and tested. The paper summarizes the results of these efforts to show the potential advantages of the hydrate-based refrigeration system over conventional ones and to give the prospects of the described refrigeration-system development. [Reprinted with permission from Elsevier. Copyright, 2006].

Details

  • Original title: Development of a novel hydrate-based refrigeration system: a preliminary overview.
  • Record ID : 2007-0675
  • Languages: English
  • Source: Applied Thermal Engineering - vol. 26 - n. 17-18
  • Publication date: 2006/12

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