Performance of virtually non-flammable azeotropic HFO1234yf/HFC134a mixture for HFC134a applications

Lee, Yohan; Kang, Dong Gyu; Jung, Dongsoo

doi:10.1016/j.ijrefrig.2013.02.015

Cited by 49 publications

(21 citation statements)

References 4 publications

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“…In order to overcome limitations related to HFOs (as flammability [18] or minor cooling capacity [19]), it has been developed several mixtures of HFO with HFCs [20] or even natural refrigerants [21]. In the concrete case of the R1234ze, it has been studied mixed with R152a [22], R134a [23] or R32 [24].…”

Section: Introductionmentioning

confidence: 99%

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

Mota-Babiloni

Navarro-Esbrí

Barragán-Cervera

et al. 2015

International Journal of Refrigeration

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This work presents an experimental analysis of a non-flammable R1234ze/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 carried out in a vapour compression plant equipped with a variable-speed compressor. The replacement suitability has been studied combining different operating conditions: evaporation temperature, condensation temperature and the use of an internal heat exchanger (IHX). The drop-in cooling capacity of R450A compared with R134a is 6% lower as average. R450A COP is even higher to those resulting with R134a (approximately 1%). The discharge temperature of R450A is lower than that of R134a, 2K as average. The IHX has a similar positive influence on the energy performance of both fluids. In conclusion, R450A can be considered as a good candidate to replace R134a.

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Section: Introductionmentioning

confidence: 99%

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

Mota-Babiloni

Navarro-Esbrí

Barragán-Cervera

et al. 2015

International Journal of Refrigeration

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“…The results showed that the GWP was reduced for both mixtures and that the lifecycle climate performance index of the refrigerator using the R134a/R1234yf mixture decreased by 17%, compared to that of the refrigerator using R134a. Lee et al [ 32 ] experimentally compared the performance of a heat pump using R134a/R1234yf (10/90 wt%) and R134a under summer and winter conditions and reported that the COP and capacity of the heat pump using R134a/R1234yf were similar to those of the heat pump using R134a. Yataganbaba et al [ 33 ] theoretically analyzed the exergy of a vapor compression refrigeration system with two evaporators when R1234yf and R1234ze(E) were used and found that exergy efficiency was significantly influenced by temperature changes in the evaporator and condenser.…”

Section: Introductionmentioning

confidence: 99%

Performance Characteristics of Automobile Air Conditioning Using the R134a/R1234yf Mixture

Shin

Kim²,

Lee

et al. 2019

Entropy

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In this study, the energy and exergy of an automobile refrigeration system using R134a and R134a/R1234yf were analyzed experimentally with respect to outdoor air temperature and compressor speed. As outdoor air temperature increased from 32.5 °C to 37.5 °C, the coefficient of performance (COP) and total exergy destruction rate of the refrigeration system using Mix30 decreased by 5.19% and 25.8% on average, compared to that of the system using R134a. The exergy efficiency of the Mix30 refrigeration system was on average 21.8% higher than that of the R134a system. As the compressor rotating speed increased from 1000 to 2000 rpm, the cooling capacity of the refrigeration system using R134a and R134a/R1234yf increased, while the COP decreased. The COP and total exergy destruction rate of the refrigeration system using Mix30 decreased by 4.82% and 19.5%, compared to that of the system using R134a. The exergy efficiency of the Mix30 refrigeration system increased on average by 20.7%, compared to that of the R134a system. The total exergy destruction rate of the automobile refrigeration system using R134a/R1234yf decreased with increase in R1234yf, while exergy efficiency increased. In addition, the exergy destruction rate of the automobile refrigeration system decreased as the amount of R1234yf in the R134a/R1234yf automobile refrigeration system increased.

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“…An alternative solution has been put forward with the introduction into the market of the fourth generation refrigerants: the hydro-fluoro-olefins (HFO) characterised by GWP values close to 1, such as HFO1234ze and HFO1234yf. The HFC/HFO mixtures have also been investigated and proposed as a possibility to perform a drop-in replacement HFC134a [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%