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Applications of SchickR-723 blend in commercial refrigeration systems.

Author(s) : GERMANUS J., RÖMER S., KRAUSS D.

Summary

The azeotropic blend of ammonia and dimethyl ether is an alternative to ammonia. The mixture of 60 weight% ammonia and 40 weight% dimethyl ether was designated SchickR-723 after the molecular weight, in accordance with the refrigerant nomenclature for inorganic refrigerants. In comparison to pure ammonia, the blend has a lot of advantages. With the SchickR-723, lower discharge temperatures of approximately 15-25 degrees are possible. The solubility of the refrigerant in conventional oils is improved. An additional characteristic of the blend is the higher heat transfer in evaporator and condenser. The COP value of the blend is higher than the pure ammonia. Because of the low GWP value and a zero ODP value the blend is an environmentally friendly natural refrigerant. The azeotropic refrigerant can be used in small and medium size refrigeration systems as a working fluid in a similar way to R-717. Further applications of the refrigerant are provided. The presentation shows several examples where SchickR-723 is used as working fluid under real working conditions with different components like compressors in refrigerating machines. The positive experiences demonstrate the advantage of the SchickR-723.

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Pages: 2009-2

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Details

  • Original title: Applications of SchickR-723 blend in commercial refrigeration systems.
  • Record ID : 2009-1455
  • Languages: English
  • Subject: General information
  • Source: 3th Conference on Ammonia Refrigeration Technology. Proceedings: Ohrid, North Macedonia, May 7-9, 2009.
  • Publication date: 2009/05/07

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