Listar EMC_Articles por autoría "0fe9d51f-103b-4ff0-9d2e-21f2b6ce3a27"
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A3 and A2 refrigerants: Border determination and hunt for A2 low-GWP blends
Calleja-Anta, Daniel; Nebot-Andres, Laura; Cabello López, Ramón; Sánchez García-Vacas, Daniel; Llopis, Rodrigo Elsevier Ltd. (2021-11-26)The hunt for new refrigerant blends has been concentrated to locate A1 refrigerants. However, the investigation for A2 or A2L blends to replace hydrocarbons (A3) has not attracted attention yet, although these mixtures ... -
Alternative mixtures to R-600a. Theoretical assessment and experimental energy evaluation of binary mixtures in a commercial cooler
Calleja-Anta, Daniel; Sánchez García-Vacas, Daniel; Nebot Andrés, Laura; Cabello López, Ramón; Llopis, Rodrigo Elsevier (2023-08-01)This work focuses on the exploration of binary mixtures as alternative to isobutane (R-600a) from a theoretical and experimental point of view. To predict the most energy efficient blends, a theoretical model was used that ... -
Drop-in substitutes for R-600a. Experimental evaluation and optimization of a commercial fridge
Calleja-Anta, Daniel; Nebot-Andres, Laura; Sánchez García-Vacas, Daniel; Cabello López, Ramón; Llopis, Rodrigo Elsevier (2022-07-05)This work aims to validate the hypothesis that refrigerant blends could allow energy savings in real refrigeration systems. For that purpose, five selected blends have been evaluated as drop-in substitutes in a domestic ... -
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 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 performance assessment of an auto-cascade cycle for ultra-low temperatures with the pair R1150 - R600a
Llopis, Rodrigo; Martínez Ángeles, Manel; Calleja-Anta, Daniel; Nebot-Andres, Laura Elsevier (2024-03-01) -
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 assessment of CO2/R-152a mixtures in a refrigeration plant with integrated mechanical subcooling
Martínez Ángeles, Manel; Nebot-Andres, Laura; Calleja-Anta, Daniel; Llopis, Rodrigo Science Direct (2024-02-01)During the last years, CO2 utilization has grown in the refrigeration sector, especially in medium and large size plants. These cycles have implemented complex architectures to improve their energetic performance and be ... -
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 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 ... -
Experimental evaluation of the desuperheater influence in a CO2 booster refrigeration facility
Catalán-Gil, Jesús; Sánchez García-Vacas, Daniel; Cabello López, Ramón; Llopis, Rodrigo; Nebot-Andres, Laura; Calleja-Anta, Daniel Elsevier (2020-03-05)Commercial refrigeration has undergone significant changes in recent years. In the European market, this is mainly due to the F-Gas Regulation (EU 517/2014). F-Gas affects in great measure to commercial centralized ... -
Improvements in CO2 Booster Architectures with Different Economizer Arrangements.
Catalán-Gil, Jesús; Nebot-Andres, Laura; Sánchez García-Vacas, Daniel; Llopis, Rodrigo; Cabello López, Ramón; Calleja-Anta, Daniel MDPI (2020-03-09)CO2 transcritical booster architectures are widely analyzed to be applied in centralized commercial refrigeration plants in consonance with the irrevocable phase-out of HFCs. Most of these analyses show the limitations ... -
Optimizing R152a/R600 and R290/R600 mixtures for superior energy performance in vapor compression systems: Promising alternatives to Isobutane (R600a)
Calleja-Anta, Daniel; Martínez Ángeles, Manel; Nebot-Andres, Laura; Sánchez, Daniel; Llopis, Rodrigo Elsevier (2024-06-15)This study presents an experimental investigation into the optimal composition of R152a/R600 and R290/R600 mixtures as potential alternatives to isobutane (R600a) in a single-stage vapor compression cycle. The research ... -
R-454C, R-459B, R-457A and R-455A as low-GWP replacements of R-404A: Experimental evaluation and optimization
Llopis, Rodrigo; Calleja-Anta, Daniel; Sánchez García-Vacas, Daniel; Nebot-Andres, Laura; Catalán-Gil, Jesús; Cabello López, Ramón Elsevier (2019-06-12)This work evaluates R-454C, R-459B, R-457A and R-455A as R-404A low-GWP substitutes in a stand-alone commercial refrigeration system for fresh product under ISO 23953-2. System is tested with and without receiver. Charge ... -
TEWI analysis of a standalone refrigeration system using low-GWP fluids with leakage ratio consideration
Llopis, Rodrigo; Calleja-Anta, Daniel; Maiorino, Angelo; Nebot-Andres, Laura; Sánchez García-Vacas, Daniel Elsevier (2020-06-04)In few years, stand-alone systems will rely on low-GWP refrigerants in order to reduce their direct impact, which agrees with the recent regulations and standards. However, the energy performance of the system is dependent ... -
Thermodynamic Analysis of a CO2 Refrigeration Cycle with Integrated Mechanical Subcooling
Nebot-Andres, Laura; Calleja-Anta, Daniel; Sánchez García-Vacas, Daniel; Cabello López, Ramón; Llopis, Rodrigo MDPI (2020)Different alternatives are being studied nowadays in order to enhance the behavior of transcritical CO2 refrigeration plants. Among the most studied options, subcooling is one of the most analyzed methods in the last years, ... -
Thermodynamic screening of alternative refrigerants for R290 and R600a
Calleja-Anta, Daniel; Nebot-Andres, Laura; Catalán-Gil, Jesús; Sánchez García-Vacas, Daniel; Cabello López, Ramón; Llopis, Rodrigo Elsevier (2020)Due to Regulation EU 517/2014 (F-Gas), the use of refrigerants with GWP higher than 150 was limited from 2015 on in small capacity refrigeration systems in Europe. Although refrigerants that dominate are R600a and R290 ...