Results 31 to 40 of about 129 (110)
Convective condensation of R134a and R1234ze(E) inside microfin tube
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 +5 more
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Ivestigation on Flow Boiling Heat Transfer Characteristics of R404A in Horizontal Microfin Tube
Zhileng xuebao, 2004 Considering R404A as a pure and mixed refrigerant respectively, the boiling heat transfer coefficients were calculated inside horizontal 9.52 mm o.d. microfin tube.
韩晓霞 +3 more
doaj +2 more sources
Advances in Mechanical Engineering, 2020 To develop a comprehensive performance evaluation model of heat transfer tube, the flow condensation heat transfer experiment of R1234yf inside the tube was operated.
Liu Wei
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Case Studies in Thermal EngineeringMicrofin tubes with internal structures exhibit superior thermo-hydraulic performance, making them indispensable in systems such as air conditioning, chemical industry, and heat pumps.
Jingzhi Zhang +5 more
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Theoretical Analysis of Film Condensation in Horizontal Microfin Tubes.
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B, 2000 A theoretical study has been made of film condensation in helically-grooved, horizontal microfin tubes. The annular flow regime and the stratified flow regime were considered. For the annular flow regime, a previouly developed theoretical model was applied.
HONDA, Hiroshi +2 more
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Zhileng xuebao, 2017 Many correlations have been proposed about R404A condensation heat transfer and pressure drop, but all of them apply for smooth tubes or microfin tubes with big diameter. Some correlations are based on 5 mm diameter tube, but the refrigerant is not R404A.
Wang Xuedong +4 more
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Forced Convective Condensation of R134A Vapor Inside a Vertical Microfin Tube
Experimental Heat Transfer, 2015 In this study, condensation of pure refrigerant R134a vapor inside a vertical 18° helical microfin tube was experimentally investigated. Tests were performed at saturation pressure of 5.7–5.9 bar with mass fluxes of 20–100 kg/m2s and heat fluxes of 1.7–5.3 kW/m2.
Arslan, G., Eskin, N.
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Evaporation Performance Research of New Micro-fin Copper Tube
Zhileng xuebao, 2007 The evaporation heat transfer was experimentally investigated for the slim, cross, smooth and general micro - fin tubes in our study. The results show that the heat transfer coefficients increase with the refrigerant mass flow rate for all tested tubes ...
Deng bin, Wang kai, Tao Wenquan
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Proceedings, 2017 The flow boiling heat transfer is one of the common phenomenon happening in the industries. The micro-fin tubes are one of the geometries widely used to enhance heat transfer rate in boiling condition.
Mohammad Ali Abdous
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Mekanika, 2019 Micro-fin is the popular technique for increasing heat transfer performance of the heat exchangers. In this research, the heat transfer coefficient of water inside counter-flow heat exchangers with micro-fin was investigated by experiment at the Reynolds
Ahmad Imam Rifa’i +2 more
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