Experimental study on the operating characteristics of a display refrigerator phasing out R134a to R1234yf

Morales-Fuentes, A.; Ramírez-Hernández, H.G.; Méndez-Díaz, S.; Martínez-Martínez, Simón; Sánchez-Cruz, F.A.; Silva-Romero, J.C.; García, Héctor

doi:10.1016/j.ijrefrig.2021.05.032

Cited by 17 publications

(6 citation statements)

References 18 publications

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“…The pressure (P) -specific enthalpy (h) diagram obtained from the validation tests was given in Figure 11. Accordingly, it was seen that the actual P-h diagram overlapped with previous studies [36]. Thus, it was concluded that the experimental setup was reliable.…”

Section: Validation Of Test Resultssupporting

confidence: 69%

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Experimental investigation of usage of POE lubricants with Al₂O₃, graphene or CNT nanoparticles in a refrigeration compressor

Dağıdır,

Bilen

2023

Beilstein J. Nanotechnol.

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In this study, the use of nanolubricants containing Al2O3, graphene, and carbon nanotubes (CNTs) at different mass fractions in a refrigeration compressor was experimentally investigated. The required electrical power of the compressor was measured to determine the effect of the use of nanolubricants. Nanoparticles used in the preparation of nanolubricants were gradually added to the lubricant to determine the optimum nanoparticle mass fraction for each nanoparticle type. Thus, it was found that the compressor operated safely and efficiently with nanolubricants. Furthermore, the optimum mass fractions were determined to be 0.750% for Al2O3, 0.250% for graphene, and 0.250% for CNTs for operating conditions of this study. As a result, the required electrical power of the compressor decreased by 6.26, 6.82, and 5.55% with the addition of Al2O3, graphene, and CNT nanoparticles at optimum mass fractions of 0.750, 0.250, and 0.250% to the lubricant, respectively, compared to the compressor using pure oil. Moreover, density and dynamic viscosity of the nanolubricant samples used in the experiments were also measured, and their kinematic viscosity, which is an important parameter for lubricants, was calculated. It was determined that the kinematic viscosity continuously increased with increasing nanoparticle fraction. In conclusion, nanolubricants containing nanoparticles above the optimum mass fraction increase the required electrical power of the compressor. It is concluded that nanoparticle fractions should not be used above the optimum value in nanolubricant applications.

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Section: Validation Of Test Resultssupporting

confidence: 69%

“…The tests were performed at approximately the same evaporation and condensation temperatures. To validate the study, the actual refrigeration cycle with R1234yf is presented as in previous studies [36]. The pressure (P) -specific enthalpy (h) diagram obtained from the validation tests was given in Figure 11.…”

Section: Validation Of Test Resultsmentioning

confidence: 99%

Experimental investigation of usage of POE lubricants with Al₂O₃, graphene or CNT nanoparticles in a refrigeration compressor

Dağıdır,

Bilen

2023

Beilstein J. Nanotechnol.

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“…The optimal charging capacity of R1234yf is 92.2 g, which is about 7.8% lower than that of R134a, and the energy consumption slightly increases by 4% compared with R134a 10 . The average ambient temperature is 40°C, and the calculated EER values of R1234yf and R513A are 5% and 7.5% lower than those of R134a 11 . The results show that the capacities of R1234yf/R134a and R134a are similar in cooling and heating modes 12 .…”

Section: Introductionmentioning

confidence: 84%

“…10 The average ambient temperature is 40 C, and the calculated EER values of R1234yf and R513A are 5% and 7.5% lower than those of R134a. 11 The results show that the capacities of R1234yf/R134a and R134a are similar in cooling and heating modes. 12 The comparative experimental study between R134a and its low GWP alternative R1234yf/R134a in a domestic refrigerator was presented.…”

Section: Introductionmentioning

confidence: 84%

Theoretical analysis and experimental research on R1234yf as alternative to R134a in a heat pump system

Wang

Zhang

et al. 2022

Env Prog and Sustain Energy

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With the growing awareness of dual threats of global warming potential (GWP) and ozone depletion potential (ODP), the theoretical analysis and experimental testing of R1234yf refrigerant as alternative to R134a in a heat pump were analyzed. The results show that when the discharge pressure decreases from 1.6 MPa to 0.9 MPa, the heating COP h of R134a and R1234yf heat pumps decreases by 26.97% and 28.78%, respectively. When the evaporation temperature increases from À10 to 10 C, the heating COP h of R134a and R1234yf heat pumps increases by 12.68% and 20.88%. When the cooling water volume flow increases from 0.14m 3 /h to 0.35m 3 /h, the heating COP h of R134a and R1234yf heat pumps increases by 13.07% and 6.56%. When the chilled water volume flow increases from 0.35 to 0.53 m 3 /h, the heating COP h of R134a and R1234yf heat pumps increases by 30.31% and 29.38%.The error of theoretical calculation and experimental testing is between +10% and À15%.

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“…The latter with a strong link to "absorption cooling" from the yellow cluster. This cluster comprises a wide range of experimental studies focused on improving the efficiency [27][28][29] and reducing the cost [30,31] of vapor compression systems.…”

Section: Analysis Of Abstractmentioning

confidence: 99%

Trends in Research on Energy Efficiency in Appliances and Correlations with Energy Policies

2022

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According to the Intergovernmental Panel on Climate Change (IPCC) 5th Assessment report, energy-efficient appliances can reduce global electricity consumption even though there is an expected increase in the number and ownership of appliances. The International Energy Agency (IEA) expects a high increase in energy efficiency in traditional appliances (refrigerators, washing machines, television, etc.), and in the number of new appliances installed (also called plug loads). The bibliometric study of publications related to energy-efficient appliances carried out in this paper shows that research on this topic is growing in developed regions (North America and Europe) and even more in some developing regions (Asia Pacific) with a high emphasis on China and India. The results indicate that, in general, policies are always implemented before the core of publications on the topic, with time spans ranging from 3 to 30 years. However, the trend seems to be changing with publications related to new appliances where the core research happens shortly after or in parallel to the establishment of policies.

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Experimental study on the operating characteristics of a display refrigerator phasing out R134a to R1234yf

Cited by 17 publications

References 18 publications

Experimental investigation of usage of POE lubricants with Al₂O₃, graphene or CNT nanoparticles in a refrigeration compressor

Experimental investigation of usage of POE lubricants with Al₂O₃, graphene or CNT nanoparticles in a refrigeration compressor

Theoretical analysis and experimental research on R1234yf as alternative to R134a in a heat pump system

Trends in Research on Energy Efficiency in Appliances and Correlations with Energy Policies

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Experimental study on the operating characteristics of a display refrigerator phasing out R134a to R1234yf

Cited by 17 publications

References 18 publications

Experimental investigation of usage of POE lubricants with Al2O3, graphene or CNT nanoparticles in a refrigeration compressor

Experimental investigation of usage of POE lubricants with Al2O3, graphene or CNT nanoparticles in a refrigeration compressor

Theoretical analysis and experimental research on R1234yf as alternative to R134a in a heat pump system

Trends in Research on Energy Efficiency in Appliances and Correlations with Energy Policies

Contact Info

Product

Resources

About

Experimental investigation of usage of POE lubricants with Al₂O₃, graphene or CNT nanoparticles in a refrigeration compressor

Experimental investigation of usage of POE lubricants with Al₂O₃, graphene or CNT nanoparticles in a refrigeration compressor