Results 31 to 40 of about 1,212 (176)
Investigation of Working Fluid Performance through a Centrifugal Compression System
Applied Mechanics, 2022 Commonly, researchers have investigated many factors that impact the performance of air conditioning and refrigeration systems, such as varied cooling configurations, operating conditions and optimization of specific system components.
James Bull +2 more
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Safety Science and Technology, EarlyView.This study investigated the combustion characteristics of mixtures of the environmentally friendly flame retardant HFO‐1225zc with three combustible working fluids (HFO‐1234yf, HFC‐32, and HFO‐1243zf). The flame retardant efficacy of HFO‐1225zc on three working fluids decreases in the order: HFO‐1234yf, HFC‐32, HFO‐UFL1243zf. ABSTRACT The environmental
Biao Feng +8 more
wiley +1 more source
Thermal design and CFD simulation of an internal heat exchanger with R1234yf as an alternate refrige
Journal of Thermal EngineeringThe most widely utilized refrigerant in car air conditioners today is still R134a, particularly in developing nations, but its global warming potential is very high (1430).
B. K. PATEL
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Journal of Engineering, 2019 Reducing global warming potential (GWP) of refrigerants is needed to the decrease of ozone-depleting of refrigeration systems leakages. Refrigerant R1234yf is now used to substitute R134a inside mobile air conditioning systems.
Rafah Hussain, Issam Mohammed ali
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Energy Reports, 2020 Vapour compression refrigerator systems working with R134a are associated with high energy demand and environmental problems and refrigerator consumers’ prioritise energy consumption in choosing their choice of refrigerator systems.
T.O Babarinde, S.A Akinlabi, D.M Madyira
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Heat Transfer, Volume 55, Issue 6, Page 3495-3522, September 2026.ABSTRACT Compact plate‐fin heat exchangers (PFHEs) are commonly utilized in diverse industries, including aerospace, automotive, processing, and space. Various fin configurations, such as Plain fins, Wavy fins, Lance and Offset fins (OSFs), Perforated fins, louvered fins, and pin fins, are employed in compact heat exchangers (CHEs).
Chennu Ranganayakulu
wiley +1 more source
R134a flow patterns in small-diameter tubes
Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering, 2005 R134a vapour-liquid two-phase flow patterns were studied in vertical small-diameter tubes. The observed flow patterns include bubbly, dispersed bubble, slug, churn, annular, and mist flow. Six integrated flow pattern maps, derived for two internal diameters (2.01 and 4.26 mm) and three different pressures (6.0, 10.0, 14.0 bar), are presented.
Chen, L, Tian, YS, Karayiannis, TG
openaire +2 more sources
Lubrication Science, Volume 38, Issue 5, Page 301-326, August 2026.ABSTRACT Porous gas bearings (PGBs) enable high‐speed, oil‐free operation in modern rotating machinery. This study develops a coupled thermo‐hydrodynamic (THD) model for a cylindrical porous gas bearing lubricated with four working fluids—air, R‐134a, helium and hydrogen.
S. Bechiri, B. Bouchehit, B. Bou‐Saïd
wiley +1 more source
Naše More (Dubrovnik), 2018 Halocarbon refrigerants have been scheduled for total phase out because they contributed significantly to the two major global environmental problems - ozone layer depletion and global warming.In this study, the performances of the environmentally ...
F. O. Borokinni +2 more
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Simulation study on performance of a dual-source hybrid heat pump unit with alternative refrigerants
Energy and Built Environment, 2020 To solve the problems of single heat source heat pump systems in severe cold regions, a dual-source hybrid heat pump unit (DSHHPU) is proposed. The mathematical models of the DSHHPU when charging R134a or its alternative refrigerants R32, R290 and R600a ...
Chenguang Bai +5 more
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