Friction factor and heat tranfer coefficient of R134a liquid flow in mini-channels

Autor: André Bontemps, Barbara Watel, Bernard Thonon, Bruno Agostini
Přispěvatelé: Agence de l'Environnement et de la Maîtrise de l'Energie (ADEME), Laboratoire Systèmes Thermiques (Greth/LETH), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire des Écoulements Géophysiques et Industriels [Grenoble] (LEGI), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), Laboratoire Systèmes Thermiques (GRETh/LETH), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)
Jazyk: angličtina
Rok vydání: 2003
Předmět:
Mass flux
Friction factor
Materials science
020209 energy
Energy Engineering and Power Technology
chemistry.chemical_element
Thermodynamics
Air-conditioning
02 engineering and technology
Heat transfer coefficient
01 natural sciences
Industrial and Manufacturing Engineering
010305 fluids & plasmas
[SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph]
Aluminium
0103 physical sciences
0202 electrical engineering
electronic engineering
information engineering
Hydraulic diameter
Tube (fluid conveyance)
[PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph]
Composite material
Compact heat exchanger
geography
geography.geographical_feature_category
Mini-channels
Inlet
6. Clean water
Subcooling
chemistry
Heat flux
Zdroj: Applied Thermal Engineering
Applied Thermal Engineering, Elsevier, 2003, 22, pp.1821-1834. ⟨10.1016/S1359-4311(02)00108-4⟩
Applied Thermal Engineering, 2003, 22, pp.1821-1834. ⟨10.1016/S1359-4311(02)00108-4⟩
ISSN: 1359-4311
DOI: 10.1016/S1359-4311(02)00108-4⟩
Popis: This article presents an experimental study of friction factor and heat transfer coefficient for a vertical liquid up-flow of R134a. A flat aluminium multiport extruded tube composed of 11 parallel rectangular channels ( 3.28 mm ×1.47 mm) with hydraulic diameter of 2.01 mm was used. Mass flux ranges from 28 to 800 kg m −2 s −1 and heat flux from 0.84 to 22 kW m −2 . Working pressure is around 2000 kPa and inlet subcooling around 70 K. The results were compared with those found in the literature for conventional tubes and mini-channels, and discussed.
Databáze: OpenAIRE
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