Resumen

RODRIGUEZ MUNOZ, José Luis et al. Analysis of thermodynamics properties correlations for saturated and superheated water applied in absorption refrigeration cycles. Rev. cienc. tecnol. [online]. 2023, vol.6, n.4, e263.  Epub 25-Jun-2024. ISSN 2594-1925.  https://doi.org/10.37636/recit.v6n4e263.

This paper compares the thermodynamic properties, of saturated and superheated water, computed with proposed correlations of two groups of authors versus those obtained by the IAPWS. Besides, the COP of an absorption refrigeration cycle using LiBr-H 2 O as working pair, is estimated, for different effectiveness of the solution heat exchanger, using such correlations. The results show that there is a good agreement between both correlations proposed in comparison with the IAPWS formulations. When the correlations are used to compute the COP of the cycle, those correlations proposed by one of the two groups of authors estimate it very well, being 2.6% the maximum deviation when the cycle operates at 60% of solution heat exchanger effectiveness; while if the proposed correlations by the other group of authors are used, the deviation is almost constant averaging 6.5%. Finally, the advantage of using the correlations proposed by both authors, in comparison with those obtained by the IAPWS formulations, is that these result from simple polynomials correlations (n≤6), which makes them easier to program, as well as their possible implementation as a computational tool for the calculation of water properties in the analysis and simulation of absorption refrigeration systems.

Palabras llave : Correlations; Absorption refrigeration; LiBr-H₂O; SHX; COP.