Experimental Analysis and Optimization of an R744 Transcritical Cycle Working with a Mechanical Subcooling System
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Experimental Analysis and Optimization of an R744 Transcritical Cycle Working with a Mechanical Subcooling SystemAutoria
Data de publicació
2020-06-19Editor
MDPICita bibliogràfica
SÁNCHEZ GARCÍA-VACAS, Daniel; CATALÁN-GIL,Jesús; CABELLO LÓPEZ, Ramón; CALLEJA-ANTA, Daniel; LLOPIS, Rodrigo; NEBOT-ANDRES, Laura (2020). Experimental Analysis and Optimization of an R744 Transcritical Cycle Working with a Mechanical Subcooling System.Energies, v. 13, n. 12Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
https://www.mdpi.com/1996-1073/13/12/3204Versió
info:eu-repo/semantics/publishedVersionParaules clau / Matèries
Resum
In the last century, the refrigerant R744 (carbon dioxide) has become an environmentally friendly solution in commercial refrigeration despite its particular issues related to the low critical temperature. The use of ... [+]
In the last century, the refrigerant R744 (carbon dioxide) has become an environmentally friendly solution in commercial refrigeration despite its particular issues related to the low critical temperature. The use of transcritical cycles in warm and hot countries reveals the necessity of adopting different configurations and technologies to improve this specific cycle. Among these, subcooling methods are well-known techniques to enhance the cooling capacity and the Coefficient of Performance (COP) of the cycle. In this work, an R600a dedicated mechanical subcooling system has been experimentally tested in an R744 transcritical system at different operating conditions. The results have been compared with those obtained using a suction-to-liquid heat exchanger (IHX) to determine the degree of improvement of the mechanical subcooling system. Using the experimental tests, a computational model has been developed and validated to predict the optimal subcooling degree and the cubic capacity of the mechanical subcooling compressor. Finally, the model has been used to analyze the effect of using different refrigerants in the mechanical subcooling unit finding that the hydrocarbon R290 and the HFC R152a are the most suitable fluids. [-]
Publicat a
Energies (2020), v. 13, n. 12Proyecto de investigación
1) Ministerio de Ciencia y Tecnología (Spain) with the project RTI2018-093501-B-C2: 2) Jaume I University with the project UJI-B2019-56; 3) Ministerio de Ciencia y Tecnología (Spain) with the project RTI2018-093501-B-C21; 4) Jaume I University (Spain) with the project UJI-B2019-56Drets d'accés
info:eu-repo/semantics/openAccess
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