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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 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 ...
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 ...
Experimental evaluation of a R134a/CO2 cascade refrigeration plant
(Elsevier, 2014)
We present the experimental evaluation of a R134a/CO2 cascade refrigeration plant designed for low evaporation temperature in commercial refrigeration applications. The test bench incorporates two single- stage vapour ...
Experimental comparison between R152a and R134a working in a refrigeration facility equipped with a hermetic compressor
(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 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 ...
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 ...
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 ...
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 ...
Experimental study of an R1234ze(E)/R134a mixture (R450A) as R134a replacement
(Elsevier, 2015)
This work presents an experimental analysis of a non-flammable R1234ze(E)/R134a mixture (R450A) as R134a drop-in replacement. While R134a has a high GWP value (1430), the R450A GWP is only 547. The experimental tests are ...