Evaluation of low-GWP and mildly flammable mixtures as new alternatives for R410A in air-conditioning and heat pump system

Yu, Binbin; Ouyang, Hongsheng; Shi, Junye; Liu, Wuchan; Chen, Jiangping

doi:10.1016/j.ijrefrig.2020.09.018

Cited by 52 publications

(17 citation statements)

References 20 publications

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“…The first of the two mixture has a composition very close to that of R454B (68.9%, 31.1%), whose close-to-optimality performance are not surprising, since it is a commercial blend proposed by manufacturers as R410A replacement in commercial application. In this work, R454B reports a COP 2.9% lower than the R410A one and a volumetric heating capacity 5.3% smaller; these results is in line with the R454B-R410A comparison carried out by other literature works on similar cycles [6], [42]. On the other hand, the ternary mixture R32 = 70% + R1234yf = 18% + R290 = 12% could be interesting in applications where increasing the volumetric capacity is more important and a slight COP decrease can be accepted.…”

Section: Heat Pump Simulation Resultssupporting

confidence: 92%

“…However, many of the above listed features are conflicting or incompatible, therefore precluding the possibility that an ideal refrigerant exists or can be synthesized [1,8]. In small scale residential heat pump systems one of the most widely used refrigerant is R410A [6]. R410A is a mixture containing 50%mass of R32 (Difluoromethane, a HydroFluoroCarbon) and 50%mass of R125 (Pentafluoroethane, a HydroFluoroCarbon); it is widespread due to its excellent performances, i.e.…”

Section: Introduction and Goalsmentioning

confidence: 99%

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New Experimental Vapor-Liquid Equilibria Data and Thermodynamic Modelling for R1234yf/propane/R32 as low-GWP Mixtures in Heat Pump Applications

Panzeri

Bona²,

Signorini³

et al. 2022

J. Phys.: Conf. Ser.

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This paper presents new experimental results for the Vapor – Liquid Equilibria of binary mixtures of R1234yf and propane at 277 and 313 K. The newly collected data are then used, in combination with other existing data retrieved from the literature, to calibrate the Peng-Robinson Equation of State with suitable accuracy for domestic vapour compression heat pump cycles simulations. After calibration, the Equation of State is applied to numerical simulations, in Aspen Plus, aimed at finding the optimal refrigerant composition, among ternary mixtures containing R1234yf, propane and R32. Results identify a Pareto curve where the optimal mixtures (with flammability lower or equal to A2L and GWP < 500) are represented in terms of two contrasting objectives: COP and the volumetric heating effect. Ternary mixtures containing propane and R1234yf respectively in the range 0÷12%mass and 18÷30%mass are Pareto optimal: the mixture with the best COP (2.7% lower than R410A one) is the binary pair R32 = 70% + R1234yf = 30%, a composition very close to the one of the commercial refrigerant R454B. On the other hand, the mixture with the largest volumetric effect (6.5% higher than R410A one) is the ternary blend R32 = 70% + R1234yf = 18% + propane = 12%. This study confirms that is quite challenging to find R410A replacements featuring at the same time reasonable heating capacity and a COP not lower than R410A one.

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Section: Heat Pump Simulation Resultssupporting

confidence: 92%

Section: Introduction and Goalsmentioning

confidence: 99%

New Experimental Vapor-Liquid Equilibria Data and Thermodynamic Modelling for R1234yf/propane/R32 as low-GWP Mixtures in Heat Pump Applications

Panzeri

Bona²,

Signorini³

et al. 2022

J. Phys.: Conf. Ser.

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“…The vapor pressures of alternative refrigerants at the evaporating temperature of 272.15 K and the condensing temperature of 336.15 K were presented in Figure 14a, and the saturation temperature versus saturation pressure of R134a and its mixture refrigerants (M1 to M14) were shown in Figure 14b, where the vapor pressure refers to the dew point temperature for mixtures 19,41 . It can be concluded that the operating pressures of P1(R1234yf), M1(R13I1/R152a [30/70]), M2(R134a/R1234yf [11/89]), M5(R1234yf/R152a [76/24]), and M11(R13I1/R290 [40.3/59.7]) were similar to that of R134a.…”

Section: Resultsmentioning

confidence: 99%

“…For non‐azeotropic mixtures, it is considered that the pressures of refrigerants remain constant in the evaporator and condenser. The evaporation temperature was the average of bubble and dew point temperatures at the evaporation pressures, while the condensation temperature was the average of the bubble and dew point temperature under the condensing pressures 19 . The iteration algorithms in MATLAB were used to calculate the evaporating and condensing pressures under the specified evaporating and condensing temperatures of various mixtures.…”

Section: Refrigeration Cyclementioning

confidence: 99%

Performance evaluation of alternative refrigerants for R134a in automotive air conditioning system

Zhang

Dai

2021

Asia-Pacific J Chem Eng

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Aiming to explore environmentally friendly working fluids replace R134a for automotive air conditioning applications, seven potential pure refrigerants were analyzed first in terms of safety, environmental characteristics, and cycle performances. It was found that the pure refrigerants have some defects when applied individually. However, using the principle of complementary advantages, the mixtures employed in automotive air conditioning can make up for the shortcomings existing in the pure refrigerants. On this basis, the thermophysical models of vapor‐liquid equilibrium, enthalpy, entropy, and critical properties of binary mixtures were established. Also, the properties and cycle performances of 14 blends were investigated, and the results indicated that the predicted models of vapor‐liquid equilibrium have high accuracy, where the average absolute relative deviations of pressures and the average absolute deviations of vapor‐phase mole fractions were less than 2% and 0.005, respectively. M1 (R13I1/R152a [30/70]) and M11 (R13I1/R290 [40.3/59.7]) showed superiorities in cycle performances and environmental and safety characteristics. Moreover, the operating pressures of which were close to that of R134a, and they were expected to become the substitutes for R134a in automotive air conditioners.

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“…To address the above issues, we previously proposed some other possible sloutions, such as the application of CO 2 /R41 blends, which offers various performance merits and in the meanwhile reduces the system pressure compared to pure CO2 [2] . In addition, we evaluated M2 (R32/R1123/R161/R13I1 22%/30%/13%/35%) as low-GWP alternative for R410A in NEV heat pump to meet the GWP restriction [3] .…”

Section: Introductionmentioning

confidence: 99%

Life Cycle Climate Performance Evaluation (LCCP) of Low-GWP Refrigerants for Electric Vehicle Heat Pump Towards Carbon Neutrality

Junan¹,

Long²,

Yu³

et al. 2023

Preprint

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Evaluation of low-GWP and mildly flammable mixtures as new alternatives for R410A in air-conditioning and heat pump system

Cited by 52 publications

References 20 publications

New Experimental Vapor-Liquid Equilibria Data and Thermodynamic Modelling for R1234yf/propane/R32 as low-GWP Mixtures in Heat Pump Applications

New Experimental Vapor-Liquid Equilibria Data and Thermodynamic Modelling for R1234yf/propane/R32 as low-GWP Mixtures in Heat Pump Applications

Performance evaluation of alternative refrigerants for R134a in automotive air conditioning system

Life Cycle Climate Performance Evaluation (LCCP) of Low-GWP Refrigerants for Electric Vehicle Heat Pump Towards Carbon Neutrality

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