Evaluation on Cycle Performance of R161 as a Drop-in Replacement for R407C in Small-Scale Air Conditioning Systems

Fang, Yuanjian; Wu, Mei; Zhang, Guo; Ni, Hang; Han, Xiaohong; Chen, Guangming

doi:10.1007/s11630-022-1678-6

Cited by 8 publications

(2 citation statements)

References 20 publications

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“…First of all, new achievements in the field of low-temperature technology will be considered; for example, the authors of articles [15,16] explore the properties of refrigerant R407c. At the same time, such installations, which are energy technological complexes, must be environmentally friendly.…”

Section: Prospects For the Use Of A Heat Pump In An Energy Complex Fo...mentioning

confidence: 99%

Scientific Approaches to Solving the Problem of Joint Processes of Bubble Boiling of Refrigerant and Its Movement in a Heat Pump Heat Exchanger

Osintsev,

Aliukov,

Kovalev

et al. 2023

Energies

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The joint processes of bubble boiling and refrigerant movement in heat pump tubes are considered. A coil located on the back side of the photovoltaic panel (PVP) is used as an additional heating surface. A mathematical model of the theoretical determination of the temperature on the front surface of the PVP cooled by freon in the coil from the back side has been created. A feature of the numerical simulation of bubble boiling of refrigerant in a coil was the insufficiently detailed study of the process and the lack of references to the results obtained in earlier work. The authors have clarified the boundary conditions and assumptions for numerical simulation of the bubble boiling process of refrigerant R407C. The results were compared with the theoretically found values, and later used in the design of an energy complex consisting of a heat pump and a photovoltaic panel. The mathematical model of theoretical calculation of the PVP temperature and the methodology for constructing a numerical model of bubble boiling of refrigerant as part of the methodology for designing energy technology complexes based on the authors’ plan to present a unified methodology for energy technology complexes for desalination of seawater based on other types of renewable energy sources.

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Section: Prospects For the Use Of A Heat Pump In An Energy Complex Fo...mentioning

confidence: 99%

Scientific Approaches to Solving the Problem of Joint Processes of Bubble Boiling of Refrigerant and Its Movement in a Heat Pump Heat Exchanger

Osintsev,

Aliukov,

Kovalev

et al. 2023

Energies

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show abstract

“…In fact, refrigerants normally have different thermal-physical behaviours than air (or O 2 , N 2 ), such as refrigerants always have a higher critical point (e.g. R32 has 78.11 o C [16], air has -140.31 o C). This may bring a non-ideal gas behaviour in vortex tube than air [17].…”

Section: Introductionmentioning

confidence: 99%

An investigation into the influences of refrigerants’ thermal-physical properties on temperature separation effect of a vortex tube

2023

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The temperature separation effects of vortex tubes have been widely studied in open systems, using mainly air or N2as the working fluid. When a vortex tube is employed in a closed thermal system, more fluid choices, such as refrigerants, could be considered. Different to air, refrigerants have quite varied thermal-physical properties, and research of the thermal-physical properties? influence on the temperature separation effect is rather limited. Based on CFD simulated temperature separation effect of eight refrigerants (R152a, R290, R134a, R600a, R143a, R245fa, R227ea and R218), this study attempts to gain a better insight into how their properties could be related to compare their temperature separation performance. The analysis shows for small mass flow ratios at the cold end, the cooling effect can be assessed by the relative values of their isentropic expansion exponent. The results also suggest that a large thermal diffusivity and kinematic viscosity, and a small vapour density and Joule-Thomson (J-T) coefficient would lead to better heating effects.

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Comparison of the flow characteristics and performance of low-GWP refrigerants in expansion capillary used in air conditioning units

Barbhuiya,

Prasad,

Kruthiventi

2024

Int. J. Environ. Sci. Technol.

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Evaluation on Cycle Performance of R161 as a Drop-in Replacement for R407C in Small-Scale Air Conditioning Systems

Cited by 8 publications

References 20 publications

Scientific Approaches to Solving the Problem of Joint Processes of Bubble Boiling of Refrigerant and Its Movement in a Heat Pump Heat Exchanger

Scientific Approaches to Solving the Problem of Joint Processes of Bubble Boiling of Refrigerant and Its Movement in a Heat Pump Heat Exchanger

An investigation into the influences of refrigerants’ thermal-physical properties on temperature separation effect of a vortex tube

Comparison of the flow characteristics and performance of low-GWP refrigerants in expansion capillary used in air conditioning units

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