Experimental study on the contribution of R161 and R1234yf to the miscibility of R32 with lubricating oils

Chen, Yubo; Yang, Zhao; Liu, Hua; Ge, Yingying; Zhai, Rui; Feng, Biao; Lv, Zijian; Zhao, Wei

doi:10.1016/j.applthermaleng.2020.115338

Cited by 15 publications

(2 citation statements)

References 34 publications

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“…Replacing RGT2 did not require replacing the lubricating oil in the system. The test experimental procedures and devices were described in detail in the previous paper (Chen et al, 2020).…”

Section: Methodsmentioning

confidence: 99%

Experimental assessment of a low GWP nonflammable new refrigerant in a closed heat pump drying system

Yang

et al. 2022

J Food Process Engineering

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Low global warming potential (GWP) refrigerants are vital to mitigating the effect of heat systems on climate change. A low GWP mixture, RGT2 (R134a/R1234yf/R161, 54%/43%/3% weight), was proposed as an alternative refrigerant for R134a in heat pump systems. This article presented the results of an experimental investigation evaluating RGT2 as a possible replacement for R134a in a closed heat pump drying (CHPD) system and studying the drying characteristics of fig slices. The experiment concluded that RGT2 has a higher coefficient of performance (COP hp ) value than R134a, on average, by 1.92%, achieving lower discharge temperature and pressure ratio at different condensing temperatures (45 C-70 C). Although the heating capacity of RGT2 was slightly lower, it still met the requirements of HPD. With careful consideration of the environment, performance, and safety, RGT2 was a suitable substitute for R134a in the drying field. In addition, the drying characteristics of fig slices were significantly affected by the air temperature. The effective diffusion coefficient (D eff ) and specific moisture extracted ratio (SMER) are increased by increasing temperature and air flow rate. The two-term model was the better model to accurately predict the fig slices drying process. The highest mean D eff and SMER of CHPDS were obtained as 6.4518 Â 10 À10 m 2 /s and 39.197 g/kWh, respectively, at the highest drying air temperature. Practical ApplicationA mixed refrigerant (RGT2) was proposed to replace R134a, and its GWP value was about 61% lower than that of R134a. Most of the studies on substituting R134a in the literature are simulations. This paper aims to evaluate the substitutions' feasibility theoretically and experimentally. The results have been assessed to provide better information about RGT2 as a potential substitute for R134a with superior comprehensive performance. Drying kinetics has also been determined experimentally, which helped to simulate fig drying. This study will provide a reference for refrigerants replacement in heat pump drying.

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“…Replacing RGT2 did not require replacing the lubricating oil in the system. The test experimental procedures and devices were described in detail in the previous paper (Chen et al, 2020).…”

Section: Methodsmentioning

confidence: 99%

Experimental assessment of a low GWP nonflammable new refrigerant in a closed heat pump drying system

Yang

et al. 2022

J Food Process Engineering

Self Cite

View full text Add to dashboard Cite

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“…The solubilities of R-515B and R-471A in POE32 exhibited little changes in viscosity of POE32 as compared to R-410A, R-404A, and R-134a. Chen et al investigated the effect of R-1234yf and R-161 on the miscibility of R - 32 with mineral oil (MO), polyvinylether (PVE) oil, and polyol ester (POE) oil from 223.15 to 303.15 K. The contribution of R-1234yf and R-161 on miscibility for R-32 with POE and PVE is greater than that with MO while R-161 is better than R-1234yf. Saleem and Kim measured the miscibility of R-404A (R-125/R-134a/R-143a) and R-452A (R-32/R-125/R-1234yf) with POE SW32 from 243.15 to 313.15 K under the oil mass fraction between 5 and 70%.…”

Section: Introductionmentioning

confidence: 99%

Solubilities of R-1233zd(E) in Three Lubricating Oils and Impact of Oil Retention on the Evaporator Performance

Sun,

Wang,

Zheng

et al. 2024

J. Chem. Eng. Data

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Owing to the worse greenhouse gas effect, the global warming problem is becoming more and more serious. Exploring suitable refrigerants to replace high-GWP HFCs is currently one of the key issues of concern in the refrigeration field. Among alternatives, trans-1-chloro-3,3,3-trifluoropropene (R-1233zd(E)) is attracting a lot of fashionable attention in the refrigeration and air conditioning industry. To increase the database of solubility and enthalpy for R-1233zd(E) with polyol ester (POE) and polyalkylene glycol (PAG) oils, as well as reveal the oil retention influence on the evaporator in a vapor compression refrigeration system using R-1233zd(E), the miscibility and solubility behaviors were investigated for R-1233zd(E) with POE75, POE85, and PAG68 oils using an isochoric method between 298.15 and 343.15 K. The non-random two liquid (NRTL) equation was applied to correlate and predict the solubility. Pressure–enthalpy–vapor quality (p–h–X) diagrams were presented for R-1233zd(E) at oil circulation mass fractions (C g) of 2 and 4%. Meanwhile, the differences were analyzed for the enthalpy change and nonevaporated quantity.

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Feasibility analysis on R1234yf/R152a replacing R134a as direct cooling refrigerant for electric vehicles

Kang,

Zhang,

et al. 2024

J Mech Sci Technol

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Experimental study on the contribution of R161 and R1234yf to the miscibility of R32 with lubricating oils

Cited by 15 publications

References 34 publications

Experimental assessment of a low GWP nonflammable new refrigerant in a closed heat pump drying system

Experimental assessment of a low GWP nonflammable new refrigerant in a closed heat pump drying system

Solubilities of R-1233zd(E) in Three Lubricating Oils and Impact of Oil Retention on the Evaporator Performance

Feasibility analysis on R1234yf/R152a replacing R134a as direct cooling refrigerant for electric vehicles

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