Performance investigation of some hydro-fluorocarbon refrigerants with low global warming as substitutes to R134a in refrigeration systems

Bolaji, Bukola Olalekan; Huan, Zhongjie

doi:10.1134/s1810232814020076

Cited by 26 publications

(18 citation statements)

References 9 publications

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“…They have become the most important criteria in the development of new refrigerants. In this study, Bolaji and Huan (2014) analyze the performances of R152a, R161, and R1234yf with very low global warming potential were investigated theoretically as alternatives to R134a in vapor compression refrigeration systems. Many efforts have been paid for replacement of CFCs and HCFCs, so it is considered that a certain solution has been found to solve the ozone-depletion issue.…”

Section: Literature Surveymentioning

confidence: 99%

“…For instance, some commercial refrigeration systems use one compressor and multi evaporator because of their ability to meet various refrigerating loads at different temperatures in different zones within the same system, such as large office buildings and hotels, food preservation industries, supermarkets, etc. The rapid industrialization has led to unprecedented growth, development and technological advancement across the globe by Bolaji and Huan (2014). Today, global warming and ozone layer depletion on the one hand and spiraling oil prices on the other hand have become main challenges.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Investigation on Linde-Hampson Refrigerating System Operating with Different Blends of Hydro-Carbons as Alternate Refrigerants

2018

JAFM

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Refrigerants are the basic working fluids in refrigeration, air conditioning and heat pumping systems. The development of refrigeration and air conditioning industry depends to a large extent on the development of refrigerants to suit various applications and the development of various system components. At present the industry is dominated by the Vapour compression refrigeration systems, even though the Vapour absorption refrigeration systems have also been developed commercially. A number of climate-friendly alternatives to CFC/HCFC/ HFC refrigerants are, or will become, available for use in commercial refrigeration applications. Alternatives available today include hydrocarbons-isobutene (R-600a), propane (R-290), and propylene (R-1270) -ammonia (R-717), and carbon dioxide (R-744) respectively. This research focused to develop a strategy of refrigerants to improve the efficiency of the refrigeration system. The proposed methodology consists of Linde-Hampson refrigeration system operated with blends of hydrocarbons propane (R290) and butane (R600) as the low-temperature working fluid. To improve the efficiency of the system an evolutionary machine learning hybrid lightning search algorithm-simplex method (LSA-SM) is proposed in the study to forecast the refrigerant temperature and pressure at different ambient temperatures and loading conditions. LSA-SM has higher computational accuracy, faster convergence rate, and stronger stability than other algorithms and can effectively solve the problem of constrained nonlinear optimization in reality. The proposed methodology is mathematically modelled and executed in the running platform of Mat Lab and executed as performance charts.

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Section: Literature Surveymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Linde-Hampson Refrigerating System Operating with Different Blends of Hydro-Carbons as Alternate Refrigerants

2018

JAFM

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“…Mota-Babiloni et al [6] compared the cooling capacity and the COP, values of R1234yf and R1234ze (E), and the results showed that the cooling capacity and COP values of both alternative refrigerants were found to be about 9 to 30% and 6% lower than R134a. Bolaji and Huan [7] theoretically investigated refrigerants with low GWP as substitutes for R134a, and the results showed that the cooling capacity of R1234yf was smaller than that of R134a for different evaporation temperatures. Zilio et al [8] directly used R1234yf as an alternative to R134a, and changed the expansion valve adjustments.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on R1234yf heat pump at low ambient temperature and comparison with other refrigerants

Niu

2019

THERM SCI

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Original scientific paper https://doi.org/10.2298/TSCI171019201XIn this paper, an integrated vapor injection compression heat pump system using R1234yf, R32, R410A, R22, and R134a as working fluids was developed, and their heating performances under low ambient temperature were quantitatively evaluated. An experimental bench was built to test the system's working performance. The condensing temperature, evaporating temperature, power input, and other variables were analyzed to evaluate the system's heating capability and energy efficiency. Test results showed that the R1234yf system can run at the evaporating temperature of -20 °C, but its heating coefficient of performance was 5% lower than R134a. The R1234yf vapor injection system provided very significant performance improvements for heating performance compared with no vapor injection: the heating capacity and heating coefficient of performance can be improved by 14. 3% and 11.7%, respectively.

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“…A thorough review study reported that hydrcarbons and its mixtures were viable refrigerants to refrigeration related industries [9]. Therortical performance studies were carried out in a simple saturation vapour compression system with R1234yf, R161, R152a and R134a respectively [10]. Results revealed that R152a would be a better choice to replace R134a from the stand point of COP, power savings, volumetric capacity and GWP.…”

Section: Introductionmentioning

confidence: 99%

Analytical computation of thermodynamic performance parameters of actual vapour compression refrigeration system with R22, R32, R134a, R152a, R290 and R1270

2018

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Abstract. The present work focuses on analytical computation of thermodynamic performance of actual vapour compression refrigeration system by using six pure refrigerants. The refrigerants are namely R22, R32, R134a, R152a, R290 and R1270 respectively. A MATLAB code is developed to compute the thermodynamic performance parameters of actual vapour compression system such as refrigeration effect, compressor work, COP, power per ton of refrigeration, compressor discharge temperature and volumetric refrigeration capacity at condensing and evaporating temperatures of 54.4oC and 7.2oC respectively. Analytical results exhibited that COP of both R32 and R134a are 15.95% and 11.71% higher among the six investigated refrigerants. However R32 and R134a cannot be replaced directly into R22 system. This is due to their higher compressor discharge temperature and poor volumetric capacity respectively. The discharge temperature of both R1270 and R290 are lower than R22 by 20-26oC. Volumetric refrigeration capacity of R1270 (3197 kJ/m3) is very close to that of volumetric capacity of R22 (3251 kJ/m3). Both R1270 and R290 shows good miscibility with R22 mineral oil. Overall R1270 would be a suitable ecofriendly refrigerant to replace R22 from the stand point of ODP, GWP, volumetric capacity, discharge temperature and miscibility with mineral oil although its COP is lower.

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Performance investigation of some hydro-fluorocarbon refrigerants with low global warming as substitutes to R134a in refrigeration systems

Cited by 26 publications

References 9 publications

Experimental Investigation on Linde-Hampson Refrigerating System Operating with Different Blends of Hydro-Carbons as Alternate Refrigerants

Experimental Investigation on Linde-Hampson Refrigerating System Operating with Different Blends of Hydro-Carbons as Alternate Refrigerants

Experimental study on R1234yf heat pump at low ambient temperature and comparison with other refrigerants

Analytical computation of thermodynamic performance parameters of actual vapour compression refrigeration system with R22, R32, R134a, R152a, R290 and R1270

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