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Assessment and comparison of ternary NH3-H2O-LiBr mixture with binary NH3-H2O mixture as the working fluid of a small-scale absorption cooling system.

Number: 2564

Author(s) : JIMENEZ J. C., MARTINEZ V. X., GÓMEZ V. H., RIVERA W.

Summary

The present research compares the results of the experimental evaluation of a low-capacity single-effect absorption cooling prototype, operating with NH3-H2O and NH3-H2O-LiBr, to understand the potential advantages of using the ternary mixture over the binary one. To carry out an objective comparison of the system's performance with both substances, the mass fractions of NH3 to H2O were set at 0.38 for the binary mixtures and 0.4 for the ternary mixture, while the mass fraction of LiBr to H2O was maintained at 15%, a concentration recommended by studies available in the literature. In both cases, the absorption cooling prototype was evaluated under similar operating conditions. The range of the heat source temperature varied between 85 and 105°C, while the temperature of the cooling medium used in the condenser and absorber varied between 20 and 34°C. Under these operating conditions, a parametric analysis was conducted, evaluating desorption and evaporation pressures, evaporation temperature, cooling power, and coefficient of performance. The results indicate that the binary mixture offers better energy performance for the specified operating conditions. However, the ternary mixture could provide interesting operational advantages.

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  • Original title: Assessment and comparison of ternary NH3-H2O-LiBr mixture with binary NH3-H2O mixture as the working fluid of a small-scale absorption cooling system.
  • Record ID : 30033030
  • Languages: English
  • Subject: Technology
  • Source: 2024 Purdue Conferences. 20th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2024/07/17

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