Boiling Heat Transfer and Pressure Drop of Ammonia-Lithium Nitrate Solution in a Plate Generation Articles uri icon

publication date

  • October 2010

start page

  • 4768

end page

  • 4779

issue

  • 21-22

volume

  • 53

international standard serial number (ISSN)

  • 0017-9310

electronic international standard serial number (EISSN)

  • 1879-2189

abstract

  • This paper presents the thermal and pressure-drop experimental evaluation of a fusion plate heat exchanger (PHE) during boiling conditions of a solution of lithium nitrate in ammonia. The data are
    representative of the working conditions of generators in single-effect
    absorption chillers. The solution flow rate and outlet temperature were
    modified in the ranges of 0.041&-0.083 kg/s and 78&-95 °C, respectively.
    Correlations for single-phase-flow heat transfer are used to
    characterize the boiling heat transfer. The influences of the heat flux,
    mass flux and exit-vapour quality are analyzed. Boiling heat-transfer
    coefficients and correlations for the Nusselt number are obtained.
    Results are compared with Cooper's and Ayub's correlations for boiling
    heat transfer. Pressure drop in the solution side was also measured and
    one correlation was obtained to characterize the frictional pressure
    drop under boiling conditions.