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Absorption heat pump cycles with trifluoroethanol-polyethylene glycol dimethylethers: properties and performances.

Author(s) : HERRAIZ J., BOER D., CORONAS A.

Summary

A modified double-effect absorption cycle using the working pair trifluoroethanol (TFE)-tetraethylene glycol dimethylether (TEGDME) was studied and the results compared with the water-lithium bromide working pair. The advantages of using such a working pair with polyethylene glycol dimethylethers are: low corrosion, thermal stability, moderate pressure levels, solubility in the whole range of concentration, good vapour-liquid equilibrium, and freezing point of the refrigerant lower than 0 deg C. The disadvantages are the higher price, inflammability, transport properties and toxicity of the TFE. Introducing a slight mechanical compression of the vapours leaving the evaporator, the operation range of the double-effect cycle is extended. In the same way it is possible to work at lower generator temperatures than in the double effect cycle. Performance is increased. These systems can be interesting for the use of waste heat of temperatures lower than 100 deg C or solar energy.

Details

  • Original title: Absorption heat pump cycles with trifluoroethanol-polyethylene glycol dimethylethers: properties and performances.
  • Record ID : 1998-0252
  • Languages: English
  • Source: Ab-sorption 96. Towards sustainable technologies. Proceedings./ Ab-sorption 96. Vers les technologies durables. Comptes rendus.
  • Publication date: 1996/09/17
  • Document available for consultation in the library of the IIR headquarters only.

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