Autor segons l'article: Tariq, Hussain A; Bourouis, Mahmoud; Coronas, Alberto
Departament: Enginyeria Mecànica
Autor/s de la URV: Bourouis Chebata, Mahmoud / Coronas Salcedo, Alberto
Paraules clau: Absorber thermal conditions; Absorption; Anti-crystallization additive; Bundle; Falling film absorber; Heat and mass transfer performanc; Heat and mass transfer performance; Horizontal tube; Ionic liquids; Lib; Lithium; Performance; Solubility; Transfer enhancement; Water-vapor; Water/libr
Resum: Absorption Heat Pumps (AHPs) become attractive when low-grade energy sources power them. The water/LiBr is a commonly used working solution in which water is used as a refrigerant which is economical, abundant, nontoxic and natural refrigerant. However, water/LiBr AHPs faces an inherent challenge in operating at higher concentrations, which restrict their capability for cooling at high heat sink temperatures or for heating applications. LiBr crystallizes in water/LiBr solution at high concentrations, limiting the operational range and affecting the performance of the absorption cycle. Ionic Liquid (IL) can be added as an anti-crystallisation additive to improve the solubility of LiBr in absorbent solution. In this work, 1,3-Dimethyl-1H-imidazolium chloride [DMIM][Cl] is used as an additive containing a 6 % mass fraction in absorbent (LiBr+[DMIM][Cl]). This paper aims to characterise the wettability and heat and mass transfer processes for water/(LiBr+[DMIM] [Cl]) and water/LiBr solutions at air- and water-cooling thermal conditions. A horizontal tube falling film absorber is used in the present investigation. The new solution shows no adverse effects on the heat and mass transfer processes compared to water/LiBr; thus, both solutions performed similarly. The increase of 3 %, 8 %, and 3 % on average is noted for water absorption mass flux, heat transfer coefficient and absorber heat duty, respectively, at a cooling water temperature of 50 degrees C, with solution inlet subcooling of -3 degrees C and an absorbent concentration of 64 %. Additionally, the new working solution water/LiBr+[DMIM][Cl]) shows better wettability of absorber tube than water/LiBr, which is favorable for the absorption process.
Àrees temàtiques: Astronomia / física; Biotecnología; Ciência de alimentos; Ciências agrárias i; Ciências ambientais; Ciências biológicas i; Condensed matter physics; Engenharias i; Engenharias ii; Engenharias iii; Engenharias iv; Engineering, mechanical; Fluid flow and transfer processes; Geociências; Interdisciplinar; Matemática / probabilidade e estatística; Materiais; Mechanical engineering; Mechanics; Thermodynamics
Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
Adreça de correu electrònic de l'autor: alberto.coronas@urv.cat; mahmoud.bourouis@urv.cat
Data d'alta del registre: 2025-03-22
Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
Enllaç font original: https://www.sciencedirect.com/science/article/pii/S0017931025002005?via%3Dihub
Referència a l'article segons font original: International Journal Of Heat And Mass Transfer. 242 126859-
Referència de l'ítem segons les normes APA: Tariq, Hussain A; Bourouis, Mahmoud; Coronas, Alberto (2025). Heat and mass transfer characteristics of a horizontal tube falling film absorber working with water/lithium bromide and ionic liquid as an anti-crystallization additive. International Journal Of Heat And Mass Transfer, 242(), 126859-. DOI: 10.1016/j.ijheatmasstransfer.2025.126859
URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
DOI de l'article: 10.1016/j.ijheatmasstransfer.2025.126859
Entitat: Universitat Rovira i Virgili
Any de publicació de la revista: 2025
Tipus de publicació: Journal Publications
Repositori URV