ListarEMC_Articles por tema "R1234yf"
Mostrando ítems 1-15 de 15
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A comparison between the modeling of a reciprocating compressor using artificial neural network and physical model
Elsevier (2015)This article presents the development, validation, and comparison of two methods for modeling a reciprocating compressor. Initially, the physical mode is based on eight internal sub-processes that incorporate infinitesimal ... -
Alternative CO2-based blends for transcritical refrigeration systems
Elsevier (2023-03-21)The extensive use of CO2 in commercial refrigeration system has grown in the last two decade thanks to the development of new components and configurations that allows working in transcritical conditions efficiently. ... -
Comparative evaluation of R1234yf, R1234ze(E) and R450A as alternatives to R134a in a variable speed reciprocating compressor
Elsevier (2016-11-01)A comparative energetic evaluation of R1234yf, R1234ze(E) and R450A as alternatives to R134a in a variable speed compressor is carried out. A compressor model based on dimensionless numbers was obtained using the ... -
Development and validation of a micro-fin tubes evaporator model using R134a and R1234yf as working fluids
Elsevier (2015)This paper presents a model of shell and tube evaporator with micro-fin tubes using R1234yf and R134a. The model developed for this evaporator uses the ε-NTU method to predict the evaporating pressure, the refrigerant ... -
Drop-in energy performance evaluation of R1234yf and R1234ze(E) in a vapor compression system as R134a replacements
Elsevier (2014-10)This paper presents an energy performance evaluation of two low-GWP refrigerants, R1234yf and R1234ze(E), as drop-in replacements for R134a. Tests are carried out in a monitored vapor compression system combining different ... -
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
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 perfomance evaluation of R1234YF, R1234ze (E), R6600a, R290 and R152a as low-GWP R134a alternatives
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 ... -
Evaluación energética de los refrigerantes R1234yf y R152a como alternativa al R134a en sistemas de refrigeración
Universidad Nacional de Educación a Distancia (2013)En este artículo se presenta la evaluación del desempeño teórico de los refrigerantes R1234yf y R152a como alternativas al R134a para ciclos de refrigeración. La evaluación se realiza para un ciclo de simple etapa en un ... -
Experimental Analysis and Optimization of an R744 Transcritical Cycle Working with a Mechanical Subcooling System
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 R1234yf as a drop-in replacement for R134a in a vapor compression system
(2013-05)This paper presents an experimental analysis of a vapor compression system using R1234yf as a drop-in replacement for R134a. In this work, we compare the energy performance of both refrigerants, R134a and R1234yf, in a ... -
Experimental analysis of the internal heat exchanger influence on a vapour compression system performance working with R1234yf as a drop-in replacement for R134a
Elsevier (2013-09-25)This paper presents an experimental analysis of the influence of an internal heat exchanger on the performance of a vapour compression system using R1234yf as a drop-in replacement for R134a. In this work, we compare the ... -
Experimental evaluation of the CO2-based mixtures CO2/R32, CO2/R1234yf and CO2/R1270 in a transcritical refrigerating plant considering the effect of the internal heat exchanger (IHX)
Elsevier (2024-01-05)Using CO2 mixtures results in a simple but effective solution to increase the critical temperature of CO2 and reduce its working pressures. However, the overall effect of these mixtures on the global performance of the ... -
Experimental study of R1234yf as a drop-in replacement for R134a in a domestic refrigerator
Elsevier (2017-09)This paper presents an experimental study for three identical domestic refrigerators using R1234yf as a drop-in replacement for R134a. An alternative methodology was proposed to estimate the optimal mass charge for R1234yf; ... -
Shell-and-tube evaporator model performance with different two-phase flow heat transfer correlations. Experimental analysis using R134a and R1234yf
Elsevier (2014-01)This work presents a model of a shell-and-tube evaporator using R1234yf and R134a as working fluids. The model uses the effectiveness-NTU method to predict the evaporation pressure and the refrigerant and secondary fluid ... -
Theoretical energy performance evaluation of different single stage vapour compression refrigeration configurations using R1234yf and R1234ze(E) as working fluids
Elsevier (2014-05-10)R1234yf and R1234ze(E) have been proposed as alternatives for R134a in order to work with low GWP refrigerants, but this replacement results generally in a decrease of the performance. For this reason, it is interesting ...