Results 11 to 20 of about 13,565 (218)
Comparative Evaluation of R134a and HFO-1234ze Cryogen Spray Cooling Using a Mouse Model With Controllable Epidermal Pigmentation. [PDF]
Lasers Surg MedABSTRACT Objectives Cryogen spray cooling (CSC) is critical for protecting the epidermis during laser dermatologic procedures. The widely used cryogen, R134a, has a high global warming potential (GWP), motivating interest in environmentally favorable alternatives such as HFO‐1234ze.
Jia W +13 more
europepmc +2 more sources
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
openaire +1 more source
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
doaj +1 more source
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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Mapping of horizontal refrigerant two-phase flow patterns based on clustering of capacitive sensor signals [PDF]
, 2010 A
Bauwens, Bruno +3 more
core +2 more sources
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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FILM –WISE CONDENSATION OF R1234yf AND R134a REFRIGERANTS ON FINNED TUBE WITH 32 FINS PER INCH
Wasit Journal of Engineering Sciences, 2022 Researchers have been motivating by the global warming challenge to develop alternatives substances to compounds that contribute to this problem. The refrigerant R134a (HFC134a) has been identified as one of the most environmentally damaging gases. As a
Jasim Khalid, Alaa R. Al-Badry
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