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Experimental heat transfer coefficients in two-phase flow for the ammonia-water and ammonia-lithium nitrate mixtures.

Author(s) : RIVERA W., BEST R., VELEZ V.

Summary

The paper describes the experimental results obtained on the heat transfer in forced convective boiling of refrigerant mixtures flowing upward in a vertical tube uniformly heated. The mixtures analysed were ammonia-water and ammonia-lithium nitrate. The results showed that the mean heat transfer coefficients increase slowly for lower values of the heat flux and then increase exponentially. The highest values of the heat transfer coefficients were obtained at the highest values of the solution concentration. The presure drop increases with the heat flux and with the solution concentration values. Comparing the heat transfer coefficients values for both mixtures, it was observed that the lowest values were obtained with the ammonia-lithium nitrate mixture.

Details

  • Original title: Experimental heat transfer coefficients in two-phase flow for the ammonia-water and ammonia-lithium nitrate mixtures.
  • Record ID : 1998-0233
  • 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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