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Adsorption mechanisms of alcoholic additives in water at low pressure: an experimental study.

Number: AB-YR1-1053

Author(s) : LONARDI F., LUKE A.

Summary

Alcoholic additives are used to enhance the heat and mass transfer of the absorber, which is widely recognized as the bounding device of an absorption chiller. Small quantities of additives in the working solution reduce its surface tension, leading to a better wetting of the tube bundle of the absorber and triggering the Marangoni convection. Nevertheless, the enhancement mechanism relies on many parameters which have not been yet studied in details. The goal of this work is to investigate experimentally the adsorption mechanisms of surfactants at the interface of water drops. Static and dynamic surface tension of aqueous surfactant solutions are measured in a vacuum cell, which enables to carry out the investigations in a saturated atmosphere at reduced pressure, thus representing the real working conditions of the absorber. Results are discussed and compared with available literature.

Details

  • Original title: Adsorption mechanisms of alcoholic additives in water at low pressure: an experimental study.
  • Record ID : 30022762
  • Languages: English
  • Source: International sorption heat pump conference, ISHPC 2017, Tokyo august 7-10.
  • Publication date: 2017/08/07

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