Results 11 to 20 of about 31,202,004 (193)

Experimental Study on the Solubility of R1234ze(E) in Polyol Ester Oils

Zhileng xuebao, 2020
R1234ze(E)(1,1,1,3-tetrafluoropropene) is extremely environmental-friendly and is currently considered as one of the alternative refrigerants. In this paper, the solubility of R1234ze(E) in two polyol ester oils was measured at temperatures ranging from ...
Zhao Wenzhong, Yang Zhao, Zhai Rui, Feng Biao, L, Zijian, Chen Yubo, Ge Yingying   +7 more
doaj   +3 more sources

Condensation and evaporation of R32/R1234ze(E) and R744/R32/R1234ze(E) flow in horizontal microfin tubes [PDF]

Science and Technology for the Built Environment, 2015
The heat transfer characteristics of the low global warming potential refrigerant mixture R744/R32/R1234ze(E) in a horizontal microfin tube were investigated in this study. The condensation heat transfer coefficient of R744 /R32/R1234ze(E) (9/29/62 mass %) is somewhat lower than that of other mixtures, e.g., R744/R32/R1234ze(E) (4/43/53 mass %) and R32/
Chieko Kondou, Fumiya Mishima, Shigeru Koyama   +2 more
openaire   +2 more sources

Performance Evaluation of Centrifugal Refrigeration Compressor Using R1234yf and R1234ze(E) as Drop-In Replacements for R134a Refrigerant

Energies, 2022
With the increasing global requirements for environmental protection, refrigerants with ODP of 0 and low GWP are widely concerned and applied. In this paper, the CFD numerical method simulates the R134a centrifugal compressor directly replaced by R1234yf
Kexin Yi, Yuanyang Zhao, Guangbin Liu, Qichao Yang, Guoxin Yu, Liansheng Li   +5 more
doaj   +2 more sources

Convective condensation of R134a and R1234ze(E) inside microfin tube [PDF]

Journal of Physics: Conference Series, 2023
Abstract Environmental concerns are forcing the replacement of the commonly used refrigerants and finding new fluids is a top priority. The hydro-fluoro-olefin (HFO) R1234ze(E), because of its smaller global warming potential (GWP) and shorter atmospheric lifetime, replaced R134a.
Lucchini, A, Carraretto, I M, Phan, T N, Pittoni, P G, Molinaroli, L, Colombo, L P M   +5 more
openaire   +3 more sources

Thermal Performance Analysis of Low-GWP Refrigerants in Automotive Air-Conditioning System

Advances in Materials Science and Engineering, 2020
The energy and exergy of low-global warming potential (GWP) refrigerants were investigated experimentally and theoretically. Refrigerants with a modest GWP100 of  ≤ 150 can be sufficient for bringing down emissions which were concerned for the automotive
Yousuf Alhendal, Abdalla Gomaa, Gamal Bedair, Abdulrahim Kalendar   +3 more
doaj   +2 more sources

Functional Equations for Calculating the Properties of Low-GWP R1234ze(E) Refrigerant [PDF]

Energies, 2020
Legal requirements for the use of refrigerants increasingly restrict the use of high-global warming potential (GWP) refrigerants. As a result, there is a growing interest in natural refrigerants and in those belonging to the hydrofluoroolefins (HFO ...
Piotr Życzkowski, Marek Borowski, Rafał Łuczak, Zbigniew Kuczera, Bogusław Ptaszyński   +4 more
doaj   +2 more sources

Research on the Flammability Limits of R1234yf/R290 and R1234ze(E)/R290 Mixtures

Zhileng xuebao
Propane (R290) is a potential refrigerant substitute for household air conditioners. However, its flammability limits its application. In this study, the flammability limits of R290, 2,3,3,3-tetrafluoropropene (R1234yf), trans-1,3,3,3-tetrafluoropropene (
Shen Jun, Huang Yujie, Zhong Quan, Shi Hechun, Li Huajie, Zhao Huan   +5 more
doaj   +2 more sources

Study on the Performance of New High Temperature Heat Pump Mixtures as Alternatives to R245fa

Taiyuan Ligong Daxue xuebao, 2023
Purposes At present, the contradiction between energy supply and demand is increasingly intensifying, and high-temperature heat pumps, as an energy-saving and emission-reduction technology, can upgrade a large amount of low-grade waste heat to high-grade
Biao FENG, Zhao ZHANG, Linrui JIAN, Guanjia ZHAO, Suxia MA   +4 more
doaj   +1 more source

Simulation on Annular Flow of R1234ze(E) Flow Boiling in Micro-tubes

Zhileng xuebao, 2020
A theoretical model for annular flow of R1234ze(E) flow boiling in micro-tubes was proposed in this paper. The surface coefficient of heat transfer and pressure drop were calculated using the model.
王金, 李俊明
doaj   +1 more source

Comparison of the New Refrigerant R1336mzz(E) with R1234ze(E) as an Alternative to R134a for Use in Heat Pumps [PDF]

Processes, 2022
R134a is currently the most widely used refrigerant, whose problem is the high value of the global warming potential, and which will have to be replaced in the near future. Thus far, R1234ze(E) has proven to be the most suitable alternative, but it is slightly flammable. Recently, R1336mzz(E) has emerged as a possible alternative.
Jan Drofenik, Danijela Urbancl, Darko Goričanec   +2 more
openaire   +2 more sources