Improving the off-design modeling of a commercial absorption chiller

dc.article.number119470
dc.catalogadorjlo
dc.contributor.authorGonzález, José Manuel
dc.contributor.authorVilla Ochoa, Álvaro Antonio
dc.contributor.authorCardemil Iglesias, José Miguel
dc.contributor.authorGodoy, Felipe
dc.contributor.authorZamora Zapata, Mónica
dc.date.accessioned2025-03-06T18:35:11Z
dc.date.available2025-03-06T18:35:11Z
dc.date.issued2025
dc.description.abstractModeling a commercial absorption chiller accurately is essential for better integrating and optimizing their operation, especially in off-design conditions. Hence, in this work, a novel model based on the principles of mass and energy conservation was developed, incorporating three improvements for a single-effect LiBr–H2O absorption chiller, corresponding to (i) heat loss to the environment, (ii) heat transfer coefficient dependence on flow rate, and (iii) a falling film evaporator model. As a study case, the improved model was applied to simulate the off-design behavior of the Yazaki WFC-SC10 absorption chiller, using available manufacturer data. The effect of hot and chilled water temperature and hot water flow rate on performance were analyzed. Improvement (i) corrects the design point cooling capacity and heat input predictions to 0.03% and 0.04% error, respectively, far lower than the basic model (3.7% and 8.8%), while adding (ii) proves enough to enhance the off-design performance computation to excellent precision within 40%–100% of the rated hot water flow rate. Lastly, improvement (iii) allows the model to exhibit the performance-degrading partial wetting and overflow operating regimes at the evaporator, maintaining more realistic model predictions in off-design operation. The total model error in capacity and heat input with respect to manufacturer data (MAPE) decreased by 68% and 54% respectively, with respect to the hot water temperature, and by 94% and 82% with respect to its associated flow rate. Overall, this work sets a benchmark in commercial absorption chiller modeling accuracy, and particularly to the atypical behavior of the WFC-SC10.
dc.format.extent13 páginas
dc.fuente.origenSCOPUS
dc.identifier.doi10.1016/j.enconman.2024.119470
dc.identifier.issn0196-8904
dc.identifier.scopusidSCOPUS_ID:85214579678
dc.identifier.urihttps://doi.org/10.1016/j.enconman.2024.119470
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/102405
dc.information.autorucEscuela de Ingeniería; Cardemil Iglesias, José Miguel; 0000-0002-9022-8150; 119912
dc.language.isoen
dc.nota.accesocontenido parcial
dc.revistaEnergy Conversion and Management
dc.rightsacceso restringido
dc.subjectAbsorption chiller
dc.subjectFalling film evaporator
dc.subjectModel improvement
dc.subjectOff-design
dc.subjectVariable flow rate
dc.subject.ddc600
dc.subject.deweyTecnologíaes_ES
dc.titleImproving the off-design modeling of a commercial absorption chiller
dc.typeartículo
dc.volumen326
sipa.codpersvinculados119912
sipa.trazabilidadSCOPUS;2025-01-19
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