Vapor-liquid equilibrium measurements for binary mixtures of R1234yf with R32, R125, and R134a

Kamiaka, Takumi; Dang, Chaobin; Hihara, Eiji

doi:10.1016/j.ijrefrig.2012.08.016

Cited by 130 publications

(66 citation statements)

References 8 publications

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“…Thermophysical properties of these HFOs have been studied as well as equations of state have been developed and improved in the recent years [6][7][8][9][10]. Should be noted also that studies of binary mixtures of R1234ze and R1234ze with R32, R134a, R125 or ammonia had been done in order to increase energy performance or get better properties [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Drop-in energy performance evaluation of R1234yf and R1234ze(E) in a vapor compression system as R134a replacements

Mota-Babiloni

Navarro-Esbrí

Barragán-Cervera

et al. 2014

Applied Thermal Engineering

215

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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 vapour compression system combining different values of evaporation and condensation temperature, and without/with the adoption of an internal heat exchanger. The parameters analysed are volumetric efficiency, cooling capacity and COP and they are presented taking R134a as baseline. Results show that without IHX the average volumetric efficiency for R1234yf and R1234ze is 4% and 5% lower compared with R134a. The cooling capacity obtained with R1234yf and R1234ze is reduced, with an average difference of 9% and 30% without IHX, respectively. Also, COP values are about 7% lower for R1234ye and 6% lower for R1234ze than those obtained using R134a. Finally, the use of an internal heat exchanger reduces the COP differences for both replacements.Keywords: Drop-in, energy performance, R1234yf, R1234ze(E), R134a, vapour compression system. Nomenclature

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Section: Introductionmentioning

confidence: 99%

Drop-in energy performance evaluation of R1234yf and R1234ze(E) in a vapor compression system as R134a replacements

Mota-Babiloni

Navarro-Esbrí

Barragán-Cervera

et al. 2014

Applied Thermal Engineering

215

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“…From 2012, phase behavior of binary systems containing an HFO and another refrigerant were increasingly studied. Currently, the most promising mixtures are composed of R1234yf or R1234ze(E) with either an HFC or a natural refrigerant (Kamiaka et al, 2013;Hu et al, 2013;Raabe, 2013;Di Nicola et al, 2012b;Dong et al, 2013Dong et al, , 2012Yang et al, 2013;Guo et al, 2012;Di Nicola et al, 2013).…”

mentioning

confidence: 99%

Experimental measurements and correlation of vapor–liquid equilibrium and critical data for the CO 2 + R1234yf and CO 2 + R1234ze(E) binary mixtures

Juntarachat

Valtz

Coquelet

et al. 2014

International Journal of Refrigeration

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R1234ze(E) CO 2Experimental VLE data Mixture critical point PPR78 model a b s t r a c t Isothermal (P-x-y) vaporeliquid equilibrium data for the CO 2 þ 2,3,3,3-tetrafluoroprop-1-ene (R1234yf) binary system are reported at seven temperatures ranging from 283.15 K to 353.15 K. The experimental values were measured using a staticeanalytic type apparatus coupled with two electromagnetic capillary samplers (Rolsi™, Armines' patent) for repeatable and reliable equilibrium phase sampling and handling. Moreover, for the four temperatures above the critical temperature of pure CO 2 (304.3 K), the mixture critical compositions (x c ) and pressures (P c ) were calculated at each temperature using extended scaling laws.In a second step, the critical loci of the CO 2 þ R1234yf and CO 2 þ trans-1,3,3,3-tetrafluoroprop-1-ene [R1234ze(E)] were measured over the whole composition range using a synthetic-dynamic type apparatus. The subcritical and critical experimental data determined in this study were compared to those available in the open literature and were correlated using the PengeRobinson equation of state with temperature-dependent binary interaction parameters. Mesures exp erimentales et corr elation d'un equilibre vapeurliquide et donn ees critiques pour les m elanges binaires CO2 þ R1234yf et CO2 þ R1234ze(E) Mots cl es : R1234yf ; R1234ze(E) ; CO 2 ; Donn ees exp erimentales d' equilibre vapeur-liquide ; Point critique du m elange ; Mod ele PPR78 * Corresponding author. Tel.: þ33 3 83 17 50 81; fax: þ33 3 83 17 51 52. (J.-N. Jaubert).w w w . ii fi i r .o r gAvailable online at www.sciencedirect.com ScienceDirect journal homepage: w ww.elsevier.com/locate /ijrefrig i n t e r n a t i o n a l j o u r n a l o f r e f r i g e r a t i o n 4 7 ( 2 0 1 4 ) 1 4 1 e1 5 2 http://dx.

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“…Kamiaka et al [31] performed vapour-liquid equilibrium measurements at temperatures from 273 to 333 K for R32/R1234yf at mass fractions of R32 ranging from 20% to 75%. The temperature glide of the refrigerant mixture R32/R1234yf (20/80%) was 8 K, which is significantly larger than that of the other R1234yf/HFC mixtures studied.…”

Section: Thermophysical Properties Of R32 Blendsmentioning

confidence: 99%

Refrigerant R32 as lower GWP working fluid in residential air conditioning systems in Europe and the USA

Mota-Babiloni

Navarro-Esbrí

Makhnatch

et al. 2017

Renewable and Sustainable Energy Reviews

111

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Because air conditioning and heat pump systems contribute greatly to greenhouse gas emissions, equipment with both lower global warming potential (GWP) working fluids and a higher level of performance should be used. R32 (difluoromethane) has been proposed to substitute R410A, particularly in residential air conditioning (RAC) systems. This study collected the most relevant and recent researches into R32 as a refrigerant so as to assess its viability in RAC systems in both Europe and the USA, as compared to R410A and other lower GWP RAC alternatives.The R32 value of GWP is 677, which is below the F-gas regulation limit in RAC equipment (750). According to ASHRAE standard 34, R32 is less flammable than hydrocarbons, and the amount of charge permitted for R32 is above the necessary level in RAC equipment. It can be concluded that R32 has significantly good heat transfer characteristics and a level of performance that make it acceptable at low condensing temperatures, thereby avoiding overly high compressor discharge temperatures. Its performance is very similar to that of R410A across the entire operating range, and it is therefore believed that R32 will be utilized in RAC systems in the remaining countries that prioritize lower GWP fluids but are less strict in their security regulations.To replace R410A under extreme conditions, some system modifications can be conducted, or R32 mixtures with hydrofluoroolefins (HFOs) can be used. Such mixtures achieve a lower performance than R32, but are acceptable replacements when considering their lower GWP compared to that of R32, and similar level of flammability. Finally, other (R32-based) alternative mixtures have also been developed and their behaviours studied under a wide range of operating conditions.

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Vapor-liquid equilibrium measurements for binary mixtures of R1234yf with R32, R125, and R134a

Cited by 130 publications

References 8 publications

Drop-in energy performance evaluation of R1234yf and R1234ze(E) in a vapor compression system as R134a replacements

Drop-in energy performance evaluation of R1234yf and R1234ze(E) in a vapor compression system as R134a replacements

Experimental measurements and correlation of vapor–liquid equilibrium and critical data for the CO 2 + R1234yf and CO 2 + R1234ze(E) binary mixtures

Refrigerant R32 as lower GWP working fluid in residential air conditioning systems in Europe and the USA

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