扁平微細多孔管内におけるHFC134aの沸騰・蒸発に関する実験

Translated title of the contribution: Experiment on Flow Boiling of HFC134a in a Multi-port Extruded Tube

桑原 憲, 文 健吾, 中下 功一, 小山 繁

    Research output: Contribution to journalArticle

    Abstract

    In the present study, the local heat transfer and pressure drop characteristics are investigated experimentally for the flow boiling of refrigerant HFC134a in a multi-port extruded tube of 1.06mm in hydraulic diameter. The test tube is 865mm in total length made of aluminum. The pressure drop was measured at an interval of 191mm, the local heat transfer coefficient was measured in every subsection of 75mm in effective heating length. The measured pressure drop was compared with a few correlations. Those data agree with the correlation of Koyama et al., proposed for condensation process, and of Friedel. The local heat transfer coefficients were also compared with correlation of Yu et al. It is pointed out that multiplier of the convection term in a rectangular channel is different from that of circular tube.
    Translated title of the contributionExperiment on Flow Boiling of HFC134a in a Multi-port Extruded Tube
    Original languageJapanese
    Pages (from-to)121-128
    Number of pages8
    Journal日本冷凍空調学会論文集
    Volume21
    Issue number2
    DOIs
    Publication statusPublished - Jun 30 2004

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