Browsing by Keyword "R134a"
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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 ... -
Design of an environmentally friendly refrigeration laboratory based on cooling capacity calculation for graduate students
Ahmad Ibrahim (2018)Lower global warming potential (GWP) refrigerants must be used in refrigeration education to integrate the environmentally responsible engineering principles in class. However, most of the refrigeration educational ... -
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 analysis of an internal heat exchanger in a vapour compression system using R1234ze(E) and R450A as alternatives for R134a
Elsevier (2015-10)The IHX (internal heat exchanger) is introduced in some refrigeration systems in order to achieve higher energy performances. Results obtained vary greatly depending on the refrigerant used and working conditions. This ... -
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 assessment of an R134a refrigeration plant upgraded to an indirect system using R152a and R1234ze(E) as refrigerants
Elsevier (2018-07-05)In this work the experimental results obtained from a direct expansion refrigerating plant converted into an indirect plant, are presented and discussed in terms of energy consumption for a commercial refrigerating unit ... -
Energy evaluation of R152a as drop in replacement for R134a in cascade refrigeration plants
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 influence of the internal heat exchangers placement in a cascade refrigeration plant. A theoretical and experimental analysis
Elsevier (2024-05-01)This paper deals with the analysis of the internal heat exchanger (IHX) impact on the energy performance of a cascade refrigeration plant (CRS) made up of two vapor compression cycles. Three IHX locations have been considered, ... -
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 ... -
Estudio experimental y modelización de un micro refrigerador doméstico
Universitat Jaume I (2015-09-28)En los últimos años, un compresor frigorífico de tamaño reducido ha sido propuesto en el ámbito de la refrigeración. Por consiguiente, el año 2013 el laboratorio del CETHIL diseñó un circuito frigorífico en miniatura con ... -
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 ... -
Evaluación experimental del Isobutano (R600a) como substituto del R134a en instalaciones de compresión simple de vapor que utilizan compresores herméticos
Universitat Jaume I (2015)El ser humano lleva miles de años desarrollando, inventando y construyendo centenares de proyectos tecnológicos, desde pequeñas herramientas de mano hasta grandes rascacielos o puentes. Uno de los mayores saltos tecnológicos ... -
Evaluation of R448A and R450A as low-GWP alternatives for R404A and R134a using a micro-fin tube evaporator model
Elsevier (2016-04-05)When retrofitting new refrigerants in an existing vapour compression system, their adaptation to the heat exchangers is a major concern. R450A and R448A are commercial non-flammable mixtures with low GWP developed to replace ... -
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 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 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 evaluation of system modifications to increase R1234ze(E) cooling capacity
Elsevier (2017)The GWP limitations are being progressively introduced in Europe through Regulation EU No 517/201, phasing out R134a in most of its refrigeration and air conditioning applications. Pure hydrofluoroolefins are proposed to ... -
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 ... -
Experimental study of an R1234ze(E)/R134a mixture (R450A) as R134a replacement
Elsevier (2014-12-20)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 ...