Optimum Hot Water Temperature for Absorption Solar Cooling Articles uri icon

publication date

  • October 2009

start page

  • 1806

end page

  • 1814

issue

  • 10

volume

  • 83

international standard serial number (ISSN)

  • 0038-092X

electronic international standard serial number (EISSN)

  • 1471-1257

abstract

  • The hot water temperature that maximizes the overall instantaneous efficiency of a solar cooling facility is determined. A modified characteristic equation model is used and applied to single-effect lithium bromidewater absorption chillers. This model is based on the characteristic temperature difference and serves to empirically calculate the performance of real chillers. This paper provides an expli- cit equation for the optimum temperature of vapor generation, in terms of only the external temperatures of the chiller. The additional data required are the four performance parameters of the chiller and essentially a modified stagnation temperature from the detailed model of the thermal collector operation. This paper presents and discusses the results for small capacity machines for air conditioning of homes and small buildings. The discussion highlights the influence of the relevant parameters.