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Listar por palabra clave "R134a"

Mostrando ítems 1-10 de 10

Diseño de una instalación de refrigeración con co2 para un supermercado ubicado en Valencia

Climent Merino, Ignacio Pascual (Universitat Politècnica de València, 2019-09-16)

[ES] El sector de la refrigeración comercial ha estado funcionando con refrigerantes conocidos como hidrofluorocarbonos o “HFC’s” como el R134a, el R404, etc. No obstante, entre las características de estas sustancias ...
Drop-in analysis of an internal heat exchanger in a vapour compression system using R1234ze(E) and R450A as alternatives for R134a

Mota Babiloni, Adrián; Navarro Esbrí, Joaquín; Barragán Cervera, Ángel; Moles, F.; Peris, B. (Elsevier, 2015-10-15)

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 vapour compression system as R134a replacements

Mota-Babiloni, Adrián; Navarro-Esbrí, J.; Barragán Cervera, Ángel; Molés, Francisco; Peris, Bernardo (Elsevier, 2014)

[EN] 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 ...
Evaluación energética de los refrigerantes R1234yf y R152a como alternativa al R134a en sistemas de refrigeración

Mendoza Miranda, Juan Manuel; Navarro Esbri, Joaquin; Mota Babiloni, Adrián; Belman Flores, Juan Manuel; Rubio Arana, José Cuauhtémoc; Peris Pérez, Bernardo; Molés Ribera, Francisco (Universidad Nacional de Educación a Distancia (UNED), 2013-10)

[EN] This paper presents a theoretical performance of R1234yf and R152a as possible replacements of R134a in refrigeration systems. The refrigeration system performance using R134a, R1234yf and R152a was carried out for ...
Evaluation of R448A and R450A as Low-GWP alternatives for R404A and R134a using a micro-fin tubes evaporator model

Mendoza Miranda, Juan Manuel; Mota-Babiloni, Adrián; Navarro Esbri, Joaquin (Elsevier, 2016-04-05)

[EN] 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 ...
Experimental analysis of R1234yf as a drop-in replacement for R134a in a vapor compression system

Navarro Esbri, Joaquin; Mendoza Miranda, Juan Manuel; Mota Babiloni, Adrián; Barragán Cervera, Ángel; Belman Flores, Juan Manuel (Elsevier, 2013-05)

[EN] 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, ...
Experimental comparison between R152a and R134a working in a refrigeration facility equipped with a hermetic compressor

Cabello, R.; Sanchez, D.; Llopis Doménech, Rodrigo; Armendáriz Araúzo, Luis Miguel; Torrella Alcaraz, Enrique (Elsevier, 2015)

[EN] The EU Regulation 517/2014 has recently been approved in a further attempt to curb the effects of GlobalWarming. As a consequence, the refrigeration sector is moving towards refrigerants with a low GlobalWarming ...
Experimental evaluation of a R134a/CO2 cascade refrigeration plant

Sanz Kock, Carlos; Llopis, Rodrigo; Sánchez, Daniel; Cabello, Ramón; Torrella Alcaraz, Enrique (Elsevier, 2014-12-05)

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 study of an R1234ze(E)/R134a mixture (R450A) as R134a replacement

Mota Babiloni, Adrián; Navarro Esbri, Joaquin; Barragán Cervera, Ángel; Moles Ribera, Francisco; Peris Pérez, Bernardo (Elsevier, 2015-03)

[EN] 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 ...
Shell-and-tube evaporator model performance with different two-phase flow heat transfer correlations. Experimental analysis using R134a and R1234yf

Navarro-Esbrí, J.; Molés, Francisco; Peris, Bernardo; Barragan-Cervera, Angel; Mendoza-Miranda, Juan Manuel; Mota-Babiloni, Adrián; Belman Flores, Juan Manuel (Elsevier, 2014)

[EN] 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 ...