Downsizing strategy for an air-cooled indirect-fired single-effect ammonia-water absorption chiller in part-load operation in hot climates

Palacios-Lorenzo, María Esther y Marcos, José Daniel . (2024) Downsizing strategy for an air-cooled indirect-fired single-effect ammonia-water absorption chiller in part-load operation in hot climates. Case Studies in Thermal Engineering

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Título Downsizing strategy for an air-cooled indirect-fired single-effect ammonia-water absorption chiller in part-load operation in hot climates
Autor(es) Palacios-Lorenzo, María Esther
Marcos, José Daniel
Materia(s) Física
Abstract A modular mathematical model has been created to simulate an ammonia-water absorption refrigeration system indirectly fired and air-cooled. The model includes governing equations based on mass, species, and energy balances, implemented for the main components of the system. It accounts for both thermal and mass resistances in the transfer processes that occur in the system. The study evaluates the performance of the ROBUR® absorption refrigeration system, model ACF60-00 LB, operating under part-load conditions, driven by hot water temperatures ranging between 160 and 210 °C, while the ambient temperature remains up to 40 °C. This refrigeration system is characterised by including an extra valve that allows active control of the pressure levels of the system. The analysis focusses on the effect of its active control on the size of the system. The results show that increasing the pressure loss in this valve reduces the size of the air-cooled absorber to 37.3 % of its nominal size at an ambient temperature of 40 °C, while the reduction in refrigerant mass flow is 18.5 %, while the condenser size decreases 3.1 times. Evaporator, air-cooled absorber and condenser effectiveness are minimally affected. Additionally, contribution of condenser and evaporator to exergy destruction is balanced.
Palabras clave Downsizing
Thermodynamics
Ammonia-water
hot climate
Absorption
Gax
Editor(es) Elsevier
Fecha 2024
Formato application/pdf
Identificador bibliuned:DptoIE-ETSI-Articulos-Jdmarcos-0002
http://e-spacio.uned.es/fez/view/bibliuned:DptoIE-ETSI-Articulos-Jdmarcos-0002
DOI - identifier 10.1016/j.csite.2023.103911
ISSN - identifier 2214-157X
Nombre de la revista Case Studies in Thermal Engineering
Número de Volumen 53
Publicado en la Revista Case Studies in Thermal Engineering
Idioma eng
Versión de la publicación acceptedVersion
Tipo de recurso Article
Derechos de acceso y licencia http://creativecommons.org/licenses/by/4.0
info:eu-repo/semantics/openAccess
Tipo de acceso Acceso abierto
Notas adicionales La versión registrada de este artículo, publicado por primera vez en Case Studies in Thermal Engineering, está disponible en línea en el sitio web del editor: Elsevier https://doi.org/10.1016/j.csite.2023.103911
Notas adicionales The registered version of this article, first published in Case Studies in Thermal Engineering, is available online at the publisher's website: Elsevier https://doi.org/10.1016/j.csite.2023.103911

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Creado: Fri, 09 Feb 2024, 04:52:21 CET