Comparative experimental study of low GWP alternative for R134a in a walk-in cold room

Kabeel, A.E.; Khalil, A.; Bassuoni, M.M.; Raslan, M. S.

doi:10.1016/j.ijrefrig.2016.06.017

Cited by 22 publications

(11 citation statements)

References 9 publications

(7 reference statements)

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“…Mota-Babiloni et al (2017a) suggest the introduction of an IHX and a 43% higher displacement compressor to reach an R1234ze(E) match in cooling capacity with R134a. Finally, Kabeel et al (2016), using a commercial vapor compression system used to refrigerate a walk-in cold room, obtained similar energetic parameters deviation between R134a and R1234ze(E) to that predicted by the model of Leighton et al (2012).…”

Section: Stationary Refrigeration Equipmentsupporting

confidence: 73%

Recent investigations in HFCs substitution with lower GWP synthetic alternatives: Focus on energetic performance and environmental impact

Mota-Babiloni

Makhnatch

Khodabandeh

2017

International Journal of Refrigeration

140

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Recent investigations in HFCs substitution with lower GWP synthetic alternatives: focus on energetic performance and environmental impact  More studies about lower GWP refrigerants are needed to facilitate the phase-out HFCs.  HFO studies are mostly found in MAC and domestic refrigerators.  Stationary refrigeration equipment presents the major variety of studies.  Multipack centralized refrigeration systems studies are being dominated by CO 2 (R744).  R32 is limited by the discharge temperature and injection cycles are needed.  Mixtures could help to overcome pure fluids handicaps.

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Section: Stationary Refrigeration Equipmentsupporting

confidence: 73%

Recent investigations in HFCs substitution with lower GWP synthetic alternatives: Focus on energetic performance and environmental impact

Mota-Babiloni

Makhnatch

Khodabandeh

2017

International Journal of Refrigeration

140

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“…Also with hermetic compressors, Cabello et al (2015) tested R-152a as R-134a substitute, measuring reductions in capacity from 1.13 to 9.75% but increases in COP around 11.7% and of 13.2% when adding an internal heat exchanger. Experimentation with larger systems was performed by Kabeel et al (2016) with R-1234ze(E) in a walk-in cold room with a semihermetic compressor and thermostatic expansion valve. They measured 2-13% reduction in capacity but COP increments from 7 to 33% in relation to R-134a.…”

Section: Table 1 R-134a Drop-in Substitutes For Medium Temperature Amentioning

confidence: 99%

Experimental analysis of R-450A and R-513A as replacements of R-134a and R-507A in a medium temperature commercial refrigeration system

Llopis

Sánchez

Cabello

et al. 2017

International Journal of Refrigeration

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This work presents the experimental evaluation of R-513A (GWP=573) and R-450A (GWP=547) as R-134a (GWP=1301) drop-in replacements and as R-507A (GWP=3987) retrofits in a commercial direct expansion refrigeration system for medium temperature applications (2ºC). The evaluation covered 24-hour tests using a single-stage cycle with semi-hermetic compressor, an electronic expansion valve customized for each refrigerant and a commercial vertical cabinet with doors placed inside a climatic chamber. The tests were performed at three water dissipation temperatures (23.3, 32.8 and 43.6ºC). Experimental results indicate that R-513A and R-450A can operate with R-134a plants, with increments in energy consumption between -1.6 to +1.2% for R-513A and from +1.3 to +6.8% for R-450A, whereas in comparison with R-507A, R-513A offered reductions in energy consumption between 4.4 to 8.2% and R-450A between 0 to 3.3%. The paper analyses the modification of the operating pressures/temperatures and the energy indicators using the four refrigerants. KEYWORDSR-450A; R-513A; R-134a; R-507A; commercial refrigeration; energy analysis; NOMENCLATURE

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“…Kabeel et al [26], showed R1234ze can be used in applications for evaporating temperatures above 260.15 K and also, power consumption is lower than R134a by about 9% to 15%.…”

Section: Isentropic Efficiency and Effectiveness Ihx Influencementioning

confidence: 99%

“…Kabeel et al [26], showed R1234ze can be used in applications for evaporating temperatures above 260.15 K and also, power consumption is lower than R134a by about 9% to 15%. Figure 8 shows the results of relative exergy destruction in relation to isentropic efficiency for each refrigerant including R134a for maximum entropy generation into IHX (Figure 3).…”

Section: Isentropic Efficiency and Effectiveness Ihx Influencementioning

confidence: 99%

“…Kabeel et al [26], showed R1234ze can be used in applications for evaporating temperatures above 260.15 K and also, power consumption is lower than R134a by about 9% to 15%. Finally, Figure 9 presents the results obtained in the system using an exergy analysis considering a zero sub-cooling degree and zero superheating degree.…”

Section: Isentropic Efficiency and Effectiveness Ihx Influencementioning

confidence: 99%

See 1 more Smart Citation

Second Law Analysis of a Mobile Air Conditioning System with Internal Heat Exchanger Using Low GWP Refrigerants

Pérez-García

Belman-Flores

Rodríguez-Muñoz

et al. 2017

Entropy

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This paper investigates the results of a Second Law analysis applied to a mobile air conditioning system (MACs) integrated with an internal heat exchanger (IHX) by considering R152a, R1234yf and R1234ze as low global warming potential (GWP) refrigerants and establishing R134a as baseline. System simulation is performed considering the maximum value of entropy generated in the IHX. The maximum entropy production occurs at an effectiveness of 66% for both R152a and R134a, whereas for the cases of R1234yf and R1234ze occurs at 55%. Sub-cooling and superheating effects are evaluated for each one of the cases. It is also found that the sub-cooling effect shows the greatest impact on the cycle efficiency. The results also show the influence of isentropic efficiency on relative exergy destruction, resulting that the most affected components are the compressor and the condenser for all of the refrigerants studied herein. It is also found that the most efficient operation of the system resulted to be when using the R1234ze refrigerant.

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Comparative experimental study of low GWP alternative for R134a in a walk-in cold room

Cited by 22 publications

References 9 publications

Recent investigations in HFCs substitution with lower GWP synthetic alternatives: Focus on energetic performance and environmental impact

Recent investigations in HFCs substitution with lower GWP synthetic alternatives: Focus on energetic performance and environmental impact

Experimental analysis of R-450A and R-513A as replacements of R-134a and R-507A in a medium temperature commercial refrigeration system

Second Law Analysis of a Mobile Air Conditioning System with Internal Heat Exchanger Using Low GWP Refrigerants

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