Author, as appears in the article.: Rives, Ronny; Salavera, Daniel; Campos, Juan; Coronas, Alberto;
Department: Enginyeria Mecànica
URV's Author/s: Coronas Salcedo, Alberto / Rives Sanz, Ronny / Salavera Muñoz, Daniel
Keywords: Water mixture Water absorption Visualization Simultaneous determinations Optical digital interferometry Non-equilibrium modeling Modelling Mixtures Mass diffusion Marangoni convection Interferometry Heat-transfer Heat and mass transfer models Digital interferometries Diffusion in solids Concentration profiles Coefficients Ammonia/water mixture Ammonia concentrations Ammonia Absorption refrigeration system Absorption refrigeration Absorption experiments
Abstract: This study reports the development and implementation of Optical Digital Interferometry for visualizing and modelling mass diffusion in the absorption process of ammonia in water. Absorption experiments were performed at infinite dilution of ammonia and at 293 K, 303 K, and 313 K. The method developed makes it possible to visualize the development of the mass diffusion layer and determine the evolution of concentration profiles in the ammonia/water mixture, providing new spatio-temporal data on the absorption process. A non-equilibrium model based on Fick's Second Law was used to describe the mass diffusion process. It was found that the model can successfully reproduce the experimental profiles of the ammonia concentration. The method developed also allows the simultaneous determination of mass diffusivity and mass transfer coefficients from a single experimental test. The values obtained for the mass diffusivity of ammonia in water vary from 1.54 x 10-9 m2 s-1 at 293.1 K to 2.50 x 10-9 m2 s- 1 at 313.1 K. The relative deviations between the experimental mass diffusivity and literature values did not exceed 6.0%. The mass transfer coefficient ranges from 2.12 x 10-5 m s- 1 at 293.1 K to 4.19 x 10-5 m s- 1 at 313.1 K. The results show the potential of Optical Digital Interferometry for the development and validation of heat and mass transfer models used to design components in absorption refrigeration systems.
Thematic Areas: Thermodynamics Physics, fluids & plasmas Nuclear energy and engineering Mechanical engineering Materiais General chemical engineering Fluid flow and transfer processes Engineering, mechanical Engenharias iv Engenharias iii Engenharias ii Chemical engineering (miscellaneous) Chemical engineering (all) Astronomia / física Aerospace engineering
Author's mail: alberto.coronas@urv.cat daniel.salavera@urv.cat
Author identifier: 0000-0002-6109-3680 0000-0003-0061-0581
Record's date: 2024-09-07
Papper version: info:eu-repo/semantics/acceptedVersion
Link to the original source: https://www.sciencedirect.com/science/article/abs/pii/S0894177721001539
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: Experimental Thermal And Fluid Science. 130
APA: Rives, Ronny; Salavera, Daniel; Campos, Juan; Coronas, Alberto; (2022). Development of optical digital interferometry for visualizing and modelling the mass diffusion of ammonia in water in an absorption process. Experimental Thermal And Fluid Science, 130(), -. DOI: 10.1016/j.expthermflusci.2021.110509
Article's DOI: 10.1016/j.expthermflusci.2021.110509
Entity: Universitat Rovira i Virgili
Journal publication year: 2022
Publication Type: Journal Publications
Repositori URV