Autor segons l'article: Zamora, Miguel; Bourouis, Mahmoud; Coronas, Alberto; Valles, Manel
Departament: Enginyeria Mecànica
Autor/s de la URV: Bourouis Chebata, Mahmoud / Coronas Salcedo, Alberto / Vallès Rasquera, Joan Manel
Paraules clau: Part-load operation Lithium nitrate Control Ammonia Absorption chiller
Resum: A pre-industrial prototype of a new water-cooled ammonia/lithium nitrate absorption chiller was characterised at part-load operation mode. The chiller was built using brazed plate heat exchangers in all its components, including the absorber and the generator. A test campaign was carried out varying the thermal load in the chilled water circuit and keeping the hot and cooling water temperatures constant. Part-load curves of the thermal and electrical coefficients of performance were obtained, plotted and compared with data from the literature on small capacity absorption chillers with conventional working pairs, namely ammonia/water and water/lithium bromide. The experimental results showed that to achieve a higher electrical coefficient of performance at part-load operation, it was much more convenient to use an ON-OFF control than to modify the hot water temperature. Furthermore, using a simple ON-OFF control strategy, the behaviour of the new absorption chiller was more agile and responded more quickly. The part-load curve of the electrical coefficient of performance was obtained by adjusting the experimental data to the shape of the curve proposed in the standard prEN-14825:2011 for air-to-water chillers. The Cc coefficient was 0.7985 matching the value obtained dividing the remaining electrical consumption measured during the OFF half cycles by the total energy consumption generated.
Àrees temàtiques: Thermodynamics Química Mechanical engineering Materiais Interdisciplinar Engineering, mechanical Engenharias iv Engenharias iii Engenharias ii Ciência de alimentos Building and construction 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 manel.valles@urv.cat mahmoud.bourouis@urv.cat
Identificador de l'autor: 0000-0002-6109-3680 0000-0002-0748-1287 0000-0003-2476-5967
Data d'alta del registre: 2023-05-21
Versió de l'article dipositat: info:eu-repo/semantics/acceptedVersion
Enllaç font original: https://www.sciencedirect.com/science/article/abs/pii/S014070071400303X
URL Document de llicència: http://repositori.urv.cat/ca/proteccio-de-dades/
Referència a l'article segons font original: International Journal Of Refrigeration-Revue Internationale Du Froid. 56 43-51
Referència de l'ítem segons les normes APA: Zamora, Miguel; Bourouis, Mahmoud; Coronas, Alberto; Valles, Manel (2015). Part-load cahracteristics of a new ammonia/lithium nitrate absorption chiller [Caractéristiques à charge partielle d'un nouveau refroidisseur à absorption ammoniac/nitrate de lithium]. International Journal Of Refrigeration-Revue Internationale Du Froid, 56(), 43-51. DOI: 10.1016/j.ijrefrig.2014.11.005
DOI de l'article: 10.1016/j.ijrefrig.2014.11.005
Entitat: Universitat Rovira i Virgili
Any de publicació de la revista: 2015
Tipus de publicació: Journal Publications
Repositori URV