Listar EMC_Articles por autoría "51694fef-dad3-49e2-aa03-6ca577eb9529"
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Energy comparison based on experimental results of a cascade refrigeration system pairing R744 with R134a, R1234ze(E) and the natural refrigerants R290, R1270, R600a
Cabello López, Ramón; Andreu Nácher, Alejandro; Sánchez García-Vacas, Daniel; Llopis, Rodrigo; Vidan-Falomir, Francisco Elsevier (2023)Refrigeration architectures for low-temperature applications are gaining interest in the Industrial, Commercial and Health fields. One of the most classical architectures is cascade systems, where two mechanical single ... -
Energy comparison based on experimental results of a cascade refrigeration system pairing R744 with R134a, R1234ze(E) and the natural refrigerants R290, R1270, R600a
Cabello López, Ramón; Andreu Nácher, Alejandro; Sánchez García-Vacas, Daniel; Llopis, Rodrigo; Vidan-Falomir, Francisco Elsevier (2023)Refrigeration architectures for low-temperature applications are gaining interest in the Industrial, Commercial and Health fields. One of the most classical architectures is cascade systems, where two mechanical single ... -
Energy evaluation of a Low Temperature commercial refrigeration plant working with the new low-GWP blend R468A as drop-in of R404A
Cabello López, Ramón; Sánchez García-Vacas, Daniel; Llopis, Rodrigo; Nebot-Andres, Laura; Calleja-Anta, Daniel Elsevier (2021-01-20)This work analyses experimentally the energy behaviour of a centralized commercial refrigeration plant designed to be used with R404A (GWP100=3,943) at low temperatures, when it is replaced with the new low-GWP refrigerant ... -
Energy Evaluation of Multiple Stage Commercial Refrigeration Architectures Adapted to F-Gas Regulation
Catalán-Gil, Jesús; Sánchez García-Vacas, Daniel; Llopis, Rodrigo; Nebot-Andres, Laura; Cabello López, Ramón MDPI (2018-07-23)This work analyses different refrigeration architectures for commercial refrigeration providing service to medium and low temperature simultaneously: HFC/R744 cascade, R744 transcritical booster, R744 transcritical ... -
Energy evaluation of R152a as drop in replacement for R134a in cascade refrigeration plants
Cabello López, Ramón; Sánchez García-Vacas, Daniel; Llopis, Rodrigo; Catalán-Gil, Jesús; Nebot-Andres, Laura; Torrella Alcaraz, Enrique Elsevier (2017-01)An experimental comparison has been performed of a cascade refrigeration facility working with the refrigerant pairs R134a/R744 and R152a/R744. This kind of facility is suitable for industrial and commercial refrigeration ... -
Energy impact evaluation of different low-GWP alternatives to replace R134a in a beverage cooler. Experimental analysis and optimization for the pure refrigerants R152a, R1234yf, R290, R1270, R600a and R744
Sánchez García-Vacas, Daniel; Andreu Nácher, Alejandro; Calleja-Anta, Daniel; Llopis, Rodrigo; Cabello López, Ramón Elsevier (2022-02-22)Due to the entry into force in 2014 of the European F-Gas Regulation n° 517/2014 and the subsequent Kigali amendment, the phase-out of the medium and high-GWP refrigerants has speeded up in all refrigeration fields. The ... -
Energy impact of the Internal Heat Exchanger in a horizontal freezing cabinet. Experimental evaluation with the R404A low-GWP alternatives R454C, R455A, R468A, R290 and R1270
Cabello López, Ramón; Sánchez García-Vacas, Daniel; Llopis, Rodrigo; Andreu Nácher, Alejandro; Calleja-Anta, Daniel Elsevier B.V. (2022-02-08)This work analyses the influence of the Internal Heat Exchan ger (IHX) on the energy performance of a vapor compression cycle associated with a freezing cabinet using different R404A low-GWP alternatives. Among them, the ... -
Energy improvements of CO2 transcritical refrigeration cycles using dedicated mechanical subcooling
Llopis, Rodrigo; Cabello López, Ramón; Sánchez García-Vacas, Daniel; Torrella, Enrique Elsevier (2015-07)In this work the possibilities of enhancing the energy performance of CO2 transcritical refrigeration systems using a dedicated mechanical subcooling cycle are analysed theoretically. Using simplified models of the cycles, ... -
Energy influence of the IHX with R22 drop-in and long-term substitutes in refrigeration plants
Cabello López, Ramón; Torrella Alcaraz, Enrique; Llopis, Rodrigo; Sánchez García-Vacas, Daniel; Larumbe, J. A. Elsevier (2013-01-10)This work focuses on the investigation of new drop-in or long-term refrigerants for low evaporating temperatures that can be used as substitutes for HCFC-22, which is gradually being phased-out. This process is already in ... -
Energy perfomance evaluation of R1234YF, R1234ze (E), R6600a, R290 and R152a as low-GWP R134a alternatives
Sánchez García-Vacas, Daniel; Cabello López, Ramón; Llopis, Rodrigo; Arauzo Pérez, Ivan; Catalán-Gil, Jesús; Torrella Alcaraz, Enrique Elsevier (2017-02)In 2014, the Directive 517/2014 was introduced by European Parliament to reduce the use of high-GWP greenhouse gases in the European area in order to limit global climate change in accordance with the objectives marked by ... -
Evaluation of CO2-doped blends in single-stage with IHX and parallel compression refrigeration architectures
Martínez Ángeles, Manel; Sicco, Estefanía; Toffoletti, Gabriele; Nebot-Andres, Laura; Sánchez García-Vacas, Daniel; Cabello López, Ramón; CORTELLA, Giovanni; Llopis, Rodrigo Elsevier (2023-07)CO2 is the standard for medium to large-sized commercial applications, as it combines security and low environmental impact. However, it requires the use of advanced and complex cycles. Recently, CO2-doping (the addition ... -
Experimental analyis of energy performance of modified single-stage CO2 transcritical vapour compression cycles based on vapour injection in the suction line
Sánchez García-Vacas, Daniel; Cabello López, Ramón; Patiño Pérez, Jorge; Llopis, Rodrigo; Torrella Alcaraz, Enrique Elsevier (2012-12)This work presents the experimental evaluation of the energy performance of a modified single-stage CO2 transcritical refrigeration plant with an internal heat exchanger (IHX) based on vapour injection in suction line. ... -
Experimental Analysis and Optimization of an R744 Transcritical Cycle Working with a Mechanical Subcooling System
Sánchez García-Vacas, Daniel; Catalán-Gil, Jesús; Cabello López, Ramón; Calleja-Anta, Daniel; Llopis, Rodrigo; Nebot-Andres, Laura MDPI (2020-06-19)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 ... -
Experimental analysis of R-450A and R-513A as replacements of R-134a and R-507A in a medium temperature commercial refrigeration system
Llopis, Rodrigo; Sánchez García-Vacas, Daniel; Cabello López, Ramón; Catalán-Gil, Jesús; Nebot-Andres, Laura Elsevier (2017-09)This work presents the experimental evaluation of R-513A (GWP = 573) and R-450A (GWP = 547) as R-134a (GWP = 1301) drop-in replacements and as R-507A (GWP = 3987) retrofits in a commercial direct expansion refrigeration ... -
Experimental assessment of a thermoelectric subcooler included in a transcritical CO2 refrigeration plan
Aranguren, Patricia; Sánchez García-Vacas, Daniel; Casi, Álvaro; Cabello López, Ramón; Astrain, David Elsevier (2022-05-25)This study brings an experimental research that has tested a real transcritical CO2 vapor compression cycle that includes a thermoelectric subcooler at the exit of the gas-cooler of the refrigeration plant. The aforementioned ... -
Experimental assessment of dedicated and integrated mechanical subcooling systems vs parallel compression in transcritical CO2 refrigeration plants
Nebot-Andres, Laura; Calleja-Anta, Daniel; Sánchez García-Vacas, Daniel; Cabello López, Ramón; Llopis, Rodrigo Elsevier Ltd. (2022-01-15)Mechanical subcooling systems, both dedicated and integrated, have attracted lot of attention in the recent years due to their great potential to improve transcritical CO2 refrigeration systems. Numerous studies have ... -
Experimental assessment of different extraction points for the integrated mechanical subcooling system of a CO2 transcritical plant
Nebot-Andres, Laura; Calleja-Anta, Daniel; Fossi, Carlos; Sánchez García-Vacas, Daniel; Cabello López, Ramón; Llopis, Rodrigo Elsevier B.V. (2022-01-04)Subcooling systems are positioned in recent years as one of the best solutions to improve the efficiency of transcritical CO2 cycles. Specifically, the integrated mechanical subcooling cycle allows the improvement of these ... -
Experimental comparison between R152a and R134a working in a refrigeration facility equipped with a hermetic compressor
Cabello López, Ramón; Sánchez García-Vacas, Daniel; Llopis, Rodrigo; Arauzo Pérez, Ivan; Torrella, E. Elsevier (2015-07)The EU Regulation 517/2014 has recently been approved in a further attempt to curb the effects of Global Warming. As a consequence, the refrigeration sector is moving towards refrigerants with a low Global Warming Potential ... -
Experimental determination of the optimum intermediate and gas-cooler pressures of a commercial transcritical CO2 refrigeration plant with parallel compression
Nebot-Andres, Laura; Sánchez García-Vacas, Daniel; Calleja-Anta, Daniel; Cabello López, Ramón; Llopis, Rodrigo Elsevier (2021-05-05)CO2 systems used in refrigeration are becoming more complex with the aim of improving their energy performance. Parallel compression is one of the implemented solutions to enhance the performance of the plants. However, ... -
Experimental determination of the optimum working conditions of a transcritical CO2 refrigeration plant with integrated mechanical subcooling
Nebot-Andres, Laura; Catalán-Gil, Jesús; Sánchez García-Vacas, Daniel; Calleja-Anta, Daniel; Cabello López, Ramón; Llopis, Rodrigo Elsevier (2020-02-05)Subcooling methods for transcritical CO2 plants are being studied in order to improve their behavior. Among them, the Integrated Mechanical Subcooling system is one of the most promising owing that performs with high ...