Results 11 to 20 of about 15,890 (250)
An experimental study of flow boiling heat transfer of zeotropic mixture R32/R134a in a microchannel heat exchanger [PDF]
, 2021 This paper deals with the thermophysical properties of R32/R134a mixtures. A computer code has been developed based on widely acceptable correlations for property predictions. The fundamental problem of the vapor-liquid equilibrium relationship is solved by using related activity and fugacity coefficients.
А. С. Шамирзаев
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Experimental study of an R1234ze(E)/R134a mixture (R450A) as R134a replacement [PDF]
International Journal of Refrigeration, 2015 This work presents an experimental analysis of a non-flammable R1234ze(E)/R134a mixture (R450A) as R134a drop-in replacement. While R134a has a high GWP value (1430), the R450A GWP is only 547. The experimental tests are carried out in a vapour compression plant equipped with a variable-speed compressor.
Mota-Babiloni, Adrián +4 more
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The viscosity of liquid R134a [PDF]
International Journal of Thermophysics, 1993 The paper reports new measurements of the viscosity of liquid R134a over the temperature range 235 to 343 K and pressures up to 50 MPa. The measurements have been carried out in a vibrating-wire viscometer calibrated with respect to the viscosity of several liquid hydrocarbons. It is estimated that the uncertainty in the viscosity data reported is ±0.6%
C. M. B. P. Oliveira, W. A. Wakeham
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Scientific African, 2020 Refrigerants of low global warming potentials (GWPs) of ≤ 150 are required by regulations as working fluids in domestic refrigeration systems. Therefore, this study theoretically investigated the performance of five new refrigerant mixtures (R440A, R441A,
Bukola O. Bolaji
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Mapping of horizontal refrigerant two-phase flow patterns based on clustering of capacitive sensor signals [PDF]
, 2010 A
Bauwens, Bruno +3 more
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Mağallaẗ Al-kūfaẗ Al-handasiyyaẗ, 2018 In this work, the effect of capillary tube diameter on refrigerator performance is studied for refrigerants R134a, R290, R600a and its mixture which named: RMix1(70%R134a,20%R290,10%R600a), RMix2(70%R134a,10%R290,20%R600a), RMix3.(50%R134a,20%R290,30 ...
Ali K. Al-Sayyab
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Case Studies in Thermal Engineering, 2020 R134a, one of the most commonly used refrigerants especially for air conditioning (AC) systems, will be banned in automotive air conditioners after 2022 due to a high global warming potential (GWP).
Xinwen Chen +5 more
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Advances in Mechanical Engineering, 2019 Blend refrigerants combing hydrofluorocarbons and hydrocarbons are good substitutes to decrease the flammability of hydrocarbons while reducing the global warming potential of hydrofluorocarbons.
Liu Zhang +4 more
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Energy Science & Engineering, 2021 This experimental study evaluates the energy performance and climatic changes of a cascade cooling system operating with the R134a/R744 pairs (cooling capacity of 4.5‐6 kW) and R438A/R744.
Marcus Vinícius Almeida Queiroz +6 more
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Exergy Analysis of Tita nium Dioxide (TiO2) Suspended with R290/R600 as a Substitute for R134a [PDF]
Archives of Metallurgy and MaterialsSynthetic refrigerants are being phased out gradually in accordance with international environmental protection protocols because of global warming and ozone layer depletion.
D.M. Madyira, T.O. Babarinde
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