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Performance of the ternary mixture methanol-lithium bromide-zinc bromide in absorption heat pumps and heat transformers.

[In Italian. / En italien.]

Author(s) : ASDRUBALI K., BURATTI C., SANTARPIA L.

Type of article: Article

Summary

The performance of the ternary mixture methanol-lithium bromide-zinc bromide is evaluated by means of a numerical simulation, after a previous measurement of its thermodynamic and thermophysical properties. This mixture is not suitable for heat pump service, because of crystallization problems, but works satisfactorily in single-or double-stage heat transformers. The best performances are obtained with a mixture with the ratio 2:1 between the molar concentrations of lithium bromide and zinc bromide, operating in single-stage heat transformers. In this case heating is possible in the 60-90 deg C range, with a heat source ranging from 45 to 60 deg C; moreover, the cycle shows a good capability of self-regulation, as the heating temperature tends to drop, when the environment temperature rises from the minimum value of 1 deg C; in these operational conditions the cycle shows an exergetic efficiency of about 60%. E.F.

Details

  • Original title: [In Italian. / En italien.]
  • Record ID : 1993-2873
  • Languages: Italian
  • Source: Industria italiana del Freddo - vol. 46 - n. 6
  • Publication date: 1992/11
  • Document available for consultation in the library of the IIR headquarters only.

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