Autor segons l'article: Tariq, Hussain A; Altamirano, Amin; Collignon, Romain; Stutz, Benoit; Coronas, Alberto
Departament: Enginyeria Mecànica
Autor/s de la URV: Coronas Salcedo, Alberto
Paraules clau: [dmim][cl]; Systems; Solubility; Plus lithium-nitrate; Ionic liquid; Heat-capacities; Heat and mass transfer; H o-libr 2; H 2 o-lib; Equilibri; Chloride; Bromide; Aqueous-solutions; Additive; Absorption chiller
Resum: Absorption chillers are attractive because they use natural refrigerants and can be powered by low-grade heat sources. Among the commercially available working fluids, the most common one, H2O-LiBr, has a critical drawback associated with the crystallization of the solution at low temperatures and high absorbent concentrations. This limitation restricts the operating range of these systems, especially when they are air-cooled or used as heat pumps. Additives can be used in H2O-LiBr to reduce the crystallization temperature by improving the solubility of LiBr in the solution. However, they often present disadvantages such as the requirement of a rectifier, and a negative impact on heat and mass transfer. Ionic Liquids (ILs) used as additives represent an alternative to overcome these drawbacks. In the present study, 6 % of [DMIM][Cl] by mass in absorbent (LiBr + [DMIM][Cl]) is added as an anti-crystallization additive to study its effect on the experimental behavior and crystallization limit of a H2O-LiBr single-effect bi-adiabatic absorption chiller prototype. Results of H2O-LiBr and H2O-(LiBr + [DMIM][Cl]) were compared for the individual heat transfer elements and the global system COP. The results show a decrease in the crystallization temperature using H2O-(LiBr + [DMIM][Cl]), which extended the operating range of the prototype. A decrease of 15 degrees C in crystallization temperature was found for H2O-(LiBr + [DMIM][Cl]) compared to H2O-LiBr at an absorbent mass of 65 %. Crystallization impeded the operation for H2O-LiBr at the highest driving temperature (100 degrees C) and lowest cold source inlet temperature (9 degrees C), whereas no crystallization was observed at same operating conditions for the (LiBr + [DMIM][Cl]) solution. Under the tested conditions, the addition of the IL as additive increased the chiller operating range without the requirement of a rectifier and with a negligible impact on the cooling capacity and thermal COP.
Àrees temàtiques: Thermodynamics; Química; Medicina iii; Mechanics; Mechanical engineering; Materiais; Matemática / probabilidade e estatística; Interdisciplinar; Industrial and manufacturing engineering; Fluid flow and transfer processes; Engineering, mechanical; Engenharias iv; Engenharias iii; Engenharias ii; Engenharias i; Energy engineering and power technology; Energy & fuels; Ciências biológicas ii; Ciências ambientais; Ciências agrárias i; Ciência de alimentos; Ciência da computação; Biodiversidade; Astronomia / física
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
Data d'alta del registre: 2025-02-24
Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
Enllaç font original: https://www.sciencedirect.com/science/article/pii/S1359431124024244?via%3Dihub
URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
Referència a l'article segons font original: Applied Thermal Engineering. 259 124756-
Referència de l'ítem segons les normes APA: Tariq, Hussain A; Altamirano, Amin; Collignon, Romain; Stutz, Benoit; Coronas, Alberto (2025). Experimental study on the effect of an ionic liquid as anti-crystallization additive in a bi-adiabatic H2O-LiBr absorption chiller prototype. Applied Thermal Engineering, 259(), 124756-. DOI: 10.1016/j.applthermaleng.2024.124756
DOI de l'article: 10.1016/j.applthermaleng.2024.124756
Entitat: Universitat Rovira i Virgili
Any de publicació de la revista: 2025
Tipus de publicació: Journal Publications
Repositori URV