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Etude de la distribution d'écoulements adiabatiques mono- et diphasiques dans un échangeur à mini-canaux. Pertes de pression régulières et singulières.

Abstract : An experimental device was realized to characterize the distribution of a two-phase flow in a heat exchanger with minichannels and to measure the singular and regular pressure losses. A transparent test section made of polycarbonate was built in which the fluid is distributed into 8 multi-port tubes. The instrumentation makes it possible to measure the pressure losses in different points of the input header and near the intrusion of the multi-port tubes in the header.. The used fluid was the refrigerant HFE-7100 in order to carry out experiments close to atmospheric pressure and ambient temperature. The range of the vapour quality at the test section inlet was between 0.1 to 0.9. The two-phase refrigerant was condensed at the outlet of each small channel tube in order to measure each flow rate separately. The mass flux range was between 15 to 650 kg/(m².s) in the manifold and between 100 to 3 000 kg/(m².s) in the small channels. Results were compared with a numerical simulation and with available correlations for single phase flows. Other results refer to two-phase flows: pressure losses along the small channels, as well as pressure drops in the manifold singularities. These pressure losses are closely related to the flow pattern and were compared with available models for traditional diameters.
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Conference papers
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https://hal.inrae.fr/hal-02588784
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Submitted on : Friday, May 15, 2020 - 12:58:29 PM
Last modification on : Tuesday, April 12, 2022 - 3:41:30 AM

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  • HAL Id : hal-02588784, version 1
  • IRSTEA : PUB00021116

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CEA | UGA | CNRS | IRSTEA | INRAE

Citation

F. Poggi, Aurore Bontemps, A. Marechal, H. Macchi Tejeda, Denis Leducq. Etude de la distribution d'écoulements adiabatiques mono- et diphasiques dans un échangeur à mini-canaux. Pertes de pression régulières et singulières.. Assemblée Générale du GREThE, CEA, Grenoble, 14-15 novembre 2006, 2006, pp.1. ⟨hal-02588784⟩

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