Results 11 to 20 of about 741,225 (315)

Characteristics of a micro-fin evaporator: Theoretical analysis and experimental verification [PDF]

open access: yes, 2013
A theoretical analysis and experimental verification on the characteristics of a micro-fin evaporator using R290 and R717 as refrigerants were carried out.
Fan Xiao-Wei   +3 more
core   +1 more source

Condensation Characteristics of Flows in Newly Developed, Three-Dimensional Enhanced Heat Transfer Tubes

open access: yesChemical Engineering Transactions, 2023
Condensation heat transfer characteristics were studied experimentally to evaluate the heat transfer performance for copper heat transfer tubes (smooth and enhanced).
David J. Kukulka, Rick Smith, Wei Li
doaj  

Numerical simulation of cooling heat transfer of supercritical carbon dioxide in twisted elliptical tubes

open access: yesJournal of Hebei University of Science and Technology, 2018
In order to enhance the heat transfer performance of CO2 heat pump, based on the numerical simulation method of Fluent, the law of supercritical CO2 cooling and heat transfer characteristics and secondary flow in the horizontal elliptical tube whose ...
Haiting CUI, Changle YI, Siwen LIU
doaj   +1 more source

Flow Boiling Heat Transfer of R134a in a Horizontal Smooth Tube: Experimental Results, Flow Patterns, and Assessment of Correlations

open access: yesEnergies, 2022
This study presents an extensive evaluation of heat transfer characteristics, flow patterns, and pressure drop for saturation pressures ranging from 460–660 kPa in a horizontal smooth tube of 5 mm internal diameter using R134a as the working fluid.
Ernest Gyan Bediako   +2 more
doaj   +1 more source

Experimental Study of Horizontal Flow Boiling Heat Transfer Coefficient and Pressure Drop of R134a from Subcooled Liquid Region to Superheated Vapor Region

open access: yesEnergies, 2022
For the past few years, research in the field of flow boiling heat transfer has gained immense popularity for unravelling the dominant mechanism responsible for controlling heat transfer and identifying a parametric trend for understanding the ...
Ernest Gyan Bediako   +2 more
doaj   +1 more source

Flow condensation heat transfer coefficient and pressure drop data for R134a alternative refrigerants R513A and R450A in a 0.95-mm-diameter minichannel

open access: yesData in Brief, 2022
Flow condensation heat transfer coefficients and pressure drop data were collected in a small-scale vapor compression cycle. The test section consisted of seven parallel, 0.95-mm-diameter square channels which utilized a heat flux block to measure the ...
Jordan A. Morrow, Melanie M. Derby
doaj   +1 more source

The impact of separated flow on heat and mass transfer [PDF]

open access: yes, 1990
An investigation of the effect of flow separation on heat (or mass) transfer is underway. This research, sponsored by the Department of Energy (Contract No. FG02-87ER13800), is planned to enhance our understanding of the fundamental mechanisms governing the process. This report summarizes previous accomplishments and briefly describes works done during
Goldstein, R.J., Jabbari, M.Y.
openaire   +2 more sources

Co-Combustion of Coal and Biomass: Heating Surface Slagging and Flue Gases

open access: yesFire
An experimental study was carried out on the ignition and combustion processes of particles (100–200 µm in size) of coals of different degrees of metamorphism and biomass, as well as mixtures based on them, under conditions of conductive and convective ...
Andrey Zhuikov   +4 more
doaj   +1 more source

Visualization of R1233zd(E) Flow Boiling in Parallel Mini-channels

open access: yesZhileng xuebao, 2023
This study conducts a visual experimental investigation on low-pressure refrigerant R1233zd(E) in a parallel mini-channel heat sink. The evolution and distribution of flow patterns in parallel channels and the influence of flow patterns on heat-transfer ...
Zhang Zhao   +5 more
doaj   +2 more sources

Flow regime based heat transfer correlation for R245fa in a 3 mm tube [PDF]

open access: yes, 2018
241 heat transfer measurements for R254fa were conducted. The heat transfer coefficient was determined for a smooth stainless steel tube with an inner tube diameter of 3 mm. The experiments were conducted for five mass fluxes (100, 300, 500, 700 and 1000
Ameel, Bernd   +4 more
core   +3 more sources

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