Results 11 to 20 of about 2,030 (213)
Experimental evaluation of system modifications to increase R1234ze(E) cooling capacity [PDF]
Applied Thermal Engineering, 2017 The GWP limitations are being progressively introduced in Europe through Regulation EU No 517/201, phasing out R134a in most of its refrigeration and air conditioning applications. Pure hydrofluoroolefins are proposed to substitute this fluid, however generally system modifications are needed to achieve a good performance.
Mota-Babiloni, Adrián +3 more
core +5 more sources
A review of refrigerant R1234ze(E) recent investigations [PDF]
Applied Thermal Engineering, 2016 The authors thankfully acknowledge the “Ministerio de Educación, Cultura y Deporte” (Grant Number FPU12/02841) for supporting this work through “Becas y Contratos de Formación de Profesorado Universitario del Programa Nacional de Formación de Recursos Humanos de Investigación del ejercicio 2012”.
Adrián Mota-Babiloni +5 more
openaire +5 more sources
International Journal of Refrigeration, 2016 Abstract The low-global warming potential (GWP) refrigerant of R1234ze(E) is considered to be a prospective alternative to conventional R134a for car air conditioners, whereas the isomer R1234ze(Z) and R1233zd(E) are anticipated to be the low-GWP alternatives to R245fa used in high-temperature heat pumps and organic Rankine cycles.
Ryuichi Nagata +2 more
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Surface tension of low GWP refrigerants R1243zf, R1234ze(Z), and R1233zd(E)
International Journal of Refrigeration, 2015 Abstract The surface tension of R1243zf, R1234ze(Z), and R1233zd(E) were measured at temperatures from 270 K to 360 K by an experimental apparatus based on the differential capillary rise method. The deviation between the measured surface tension of R134a and R245fa and the calculated surface tension with REFPROP 9.1 ( Lemmon et al., 2013 ) was ±0.13
Chieko Kondou +4 more
openaire +3 more sources
Thermal Energy Storage of R1234yf, R1234ze, R134a and R32/MOF-74 Nanofluids: A Molecular Simulation Study. [PDF]
Materials (Basel), 2018 Thermal energy storage can be carried out by working fluid adsorbing and desorbing in porous materials. In this paper, the energy storage properties of four refrigerants, R1234yf, R1234ze, R134a and R32, with M-metal organic framework (MOF)-74 (M = Zn ...
Hu J, Liu C, Liu L, Li Q.
europepmc +3 more sources
Condensation and Evaporation of R134a, R1234ze(E) and R1234ze(Z) Flow in Horizontal Microfin Tubes at Higher Temperature [PDF]
, 2014 Hydrofluoro-olefin R1234ze(E) and the isomer R1234ze(Z) are anticipated to be environment-friendly alternatives of R134a. Especially, R1234ze(Z) is most likely to be suitable for high-temperature heat pumps in industries. The heat transfer characteristics of those refrigerants R134a, R1234ze(E) and R1234ze(Z) are experimentally compared in this study ...
Kondou, Chieko +3 more
openaire +3 more sources
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 +5 more
doaj +1 more source
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 +4 more
doaj +1 more source
Condensation and evaporation of R32/R1234ze(E) and R744/R32/R1234ze(E) flow in horizontal microfin tubes, 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 +2 more
openaire +2 more sources
IET Renewable Power Generation, Volume 17, Issue 16, Page 3741-3754, 7 December 2023., 2023 Low global warming potential (GWP) fluids were used to investigate strategies for reducing the effects of global warming and performance compared with hydro fluoro carbons (HFC) fluids. Four different combinations of the sCO2 cycle and ORC, including basic recuperated, pre‐compression, recompression with main compressor intercooling, and partial ...
Yunis Khan, Hakan Caliskan, Hiki Hong
wiley +1 more source