Prospect Evaluation of Low-GWP Refrigerants R1233zd(E) and R1336mzz(Z) Used in Solar-Driven Ejector-Vapor Compression Hybrid Refrigeration System

Wang, Xuehui; Yan, Yuying; Wright, Edward; Hao, Xinyue; Gao, Neng

doi:10.1007/s11630-020-1297-z

Cited by 17 publications

(5 citation statements)

References 37 publications

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“…Currently, for real applications of ERC under air‐conditioning (AC) conditions, HFC‐245fa is always the first choice, 16 not only because it has a relatively better coefficient of performance ( COP ) and higher safety, but also because its normal boiling temperature is 15.14°C, fitting well with the cooling demand. As the GWP of HFC‐245fa is as high as 858, 17 its low GWP alternatives should be put forward in the near future. In this study, we selected four promising candidates for potential HFC‐245fa drop‐in replacement in ERC from different categories, namely, hydrocarbon (HC‐600, GWP = 20), hydrochlorofluoroolefin (HCFO‐1224 yd(Z), GWP < 1 and HCFO‐1233zd(E), GWP = 1), and hydrofluoroolefin (HFO‐1336mzz(Z), GWP = 2).…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic investigation on low GWP drop‐in alternatives to HFC‐245fa in ejector refrigeration cycle for air condition application

Hao

Gao

Wang

et al. 2023

Asia-Pacific J Chem Eng

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The ejector refrigeration cycle (ERC) with HFC‐245fa can achieve high efficiency and reliability for air conditioning applications. However, because of its high global warming potential (GWP), HFC‐245fa needed to be phased out according to recent relative regulations. In this study, four promising alternatives to HFC‐245fa were investigated and evaluated, including HC‐600, HCFO‐1233zd(E), HFO‐1336mzz(Z), and HCFO‐1224 yd(Z). Besides their low GWP, these alternatives also have similar vapor pressure curves to HFC‐245fa, which represents a possibility for refrigerant drop‐in replacement in ERC. Thermodynamic real gas modeling of the ERC was adopted in this study for more accurate results, and a critical performance evaluation and comparison with those candidates in ERC were carried out. The results indicate that HCFO‐1233zd(E) and HCFO‐1224 yd(Z) are outstanding candidates for ERC according to the higher coefficient of performance, entrainment ratio, exergy efficiency, and lower pump power consumption, and the COP relative differences of these two refrigerants would reach 5.5% and 4.6%. HFO‐1336mzz(Z) consumes 33% less power at the pump than HFC‐245fa under the same conditions and refrigeration capacity. Minimal pump power consumption is its advantage. Although HC‐600 is prominent, with the largest coefficient of performance and entrainment ratio, its flammability is not conducive to its popularization. Machine learning is available to predict the performance of ejectors employing different refrigerants. This paper helps to properly select refrigerants for ERC and to pre‐evaluate the refrigerants' application under different working conditions.

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Section: Introductionmentioning

confidence: 99%

Thermodynamic investigation on low GWP drop‐in alternatives to HFC‐245fa in ejector refrigeration cycle for air condition application

Hao

Gao

Wang

et al. 2023

Asia-Pacific J Chem Eng

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“…The development of synthetic refrigerants such as R-32, R-125, R-1234yf, and R-134a with zero ODP and low GWP is hindered by safety concerns, processing complexity, and high cost [20,21]. R744, an alternative to R134a, belongs to the Hydrofluoroolefin family [22].…”

Section: Introductionmentioning

confidence: 99%

Energy and Exergy Analysis on Zeotropic Refrigerants R-455A and R-463A as Alternatives for R-744 in Automotive Air-Conditioning System (AACs)

Alzahrani

2023

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The popularity of vehicles and the increased time spent in cars with air conditioning systems has led to regulations in many countries that require the use of environmentally friendly refrigerants with minimal global warming and zero ozone depletion potential (GWP and ODP). Cars need high-performance, eco-friendly air conditioning systems to reduce their impact on the environment, lower fuel consumption, and decrease carbon emissions. The aim of the current work was to propose CO2-based blend zeotropic refrigerants, R-455A (R-744/32/1234yf) and R-463A (R-744/32/125/1234yf/134a), to improve the thermodynamic performance of pure CO2 refrigerants. The thermodynamic energy and exergy analysis and system optimization of an AAC system for the new zeotropic refrigerant blends compared to carbon dioxide (R-744), using Aspen HYSYS software, were investigated. The influence of cooler/condenser pressure, average evaporator temperature, cooler/condenser outlet temperature, and refrigerant flow rate on the cycles’ COP and exergy efficiency were conducted and are presented. The results showed that, at the same operating condition parameters, the cycle COP improved by 57.6 and 76.5% when using R455A and R463A instated of R744, respectively, with the advantage of reducing leakage problems due to the higher operating pressure of R744 (5–7 times higher than those of R455A and R463A), as well as requiring heavy equipment, but at optimal operating condition parameters, R744 and R-463A had a maximum COP of 14.58 and 14.19, respectively. The maximum COPs of R744, R455A, and R463A based on the optimal pressure of the cooler/condenser were 3.1, 4.25, and 5.4, respectively. Additionally, regarding the need for environmentally friendly air conditioning systems with acceptable performance in cars due to their impact on the environment and their contribution to global warming, the blend R455A is recommended for use as a refrigerant in AAC systems.

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“…At present, a number of new unsaturated hydrocarbon refrigerants with low GWP have been proposed [14][15][16][17]. A new refrigerant, developed by mixing a little C 3 H 8 with CO 2 , was proposed by Shi et al [15] to raise the critical temperature.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Study and Experimental Validation on the Applicable Refrigerant for Space Heating Air Source Heat Pump

et al. 2023

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The air source heat pump (ASHP) is developing rapidly and is widely used for space heating due to its potential for increasing energy efficiency and reducing greenhouse gas emissions. The choice of appropriate low global warming potential (GWP) alternative refrigerants is one of the challenges that ASHP systems face. Alternative refrigerants also affect the energy performance of these systems. Thus, it is essential to evaluate the performance of ASHP using environmentally friendly refrigerants to facilitate reasonable refrigerant selection. A theoretical model for simulating ASHP performance with different refrigerants is developed in this study. Experiments are conducted to validate the theoretical model. The simulation and the experimental results are found to be in good agreement. The ASHP performance indices, such as compression ratio (CR), discharging temperature (DT) and coefficients of performance (COP), are investigated using R22, R417A, R410A, R134a, R152a, R161 and R1234yf as working fluids. The results show that R152a has an average COP of 2.7% higher than R22, and R161 has an average COP of 1.4% higher than R22. R152a and R161 also have a higher CR but a lower DT than R22 under the same design conditions. In addition, R152a and R161 have ozone depletion potentials (ODP) of zero and extremely low GWPs; thus, they can be candidates to replace R22 in ASHP heating systems. This research provides a reference on refrigerant replacements for ASHP heating systems in North China.

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Prospect Evaluation of Low-GWP Refrigerants R1233zd(E) and R1336mzz(Z) Used in Solar-Driven Ejector-Vapor Compression Hybrid Refrigeration System

Cited by 17 publications

References 37 publications

Thermodynamic investigation on low GWP drop‐in alternatives to HFC‐245fa in ejector refrigeration cycle for air condition application

Thermodynamic investigation on low GWP drop‐in alternatives to HFC‐245fa in ejector refrigeration cycle for air condition application

Energy and Exergy Analysis on Zeotropic Refrigerants R-455A and R-463A as Alternatives for R-744 in Automotive Air-Conditioning System (AACs)

Theoretical Study and Experimental Validation on the Applicable Refrigerant for Space Heating Air Source Heat Pump

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