Numerical performance of a water source transcritical CO2 heat pump with mechanical subcooling
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Illán Gómez, Fernando; García Cascales, José Ramón; Sánchez Velasco, Francisco Javier; Otón Martínez, Ramón AntonioÁrea de conocimiento
Mecánica de FluidosPatrocinadores
This research was funded by the Spanish Ministry of Science and Innovation under Project TED2021-131173B-I00 and the NextGenerationEU recovery plan.Realizado en/con
Universidad Politécnica de CartagenaFecha de publicación
2022-11-18Editorial
ELSEVIERCita bibliográfica
Fernando Illán-Gómez, José R. García-Cascales, F.J.S. Velasco, Ramón A. Otón-Martínez, Numerical performance of a water source transcritical CO2 heat pump with mechanical subcooling, Applied Thermal Engineering, Volume 219, Part C, 2023, 119639, ISSN 1359-4311, https://doi.org/10.1016/j.applthermaleng.2022.119639.Revisión por pares
SIPalabras clave
Water heaterTranscritical cycle
Heat pump
CO2
DMS
IHX
Resumen
In order to improve their efficiency, transcritical CO2 heat pumps need to resort to the use of a subcooling method. Among the different subcooling methods, dedicated mechanical subcooling (DMS) systems and internal heat exchangers (IHX) are currently the more promising technologies. This paper presents a numerical study of a transcritical water source CO2 heat pump during hot water generation using different subcooling methods. Ten different configurations, including both, IHX and DMS, separately and combined in different layouts, some of them not studied previously, are analyzed numerically under the same operating conditions in order to compare their performance. A description of the numerical model is presented: compressors are modeled using the performance curves provided by their manufacturers, expansion valves are modeled as isenthalpic, and heat exchangers are modeled by deriving correlations for the evaporation/condensation pressure and heat transfer rate obtained using a 1D ...
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