水平平滑管内における二成分混合冷媒の凝縮特性の予測計算法

小山 繁, 石橋 晃, 兪 堅

研究成果: ジャーナルへの寄稿記事

抄録

In the present study, a prediction model for condensation of binary refrigerant mixtures inside a horizontal smooth tube is proposed. In this model it is assumed that the phase equilibrium is only established at the vapor liquid interface, while the bulk vapor and the bulk liquid are in a nonequilibrium state. The predicted results are compared with the experimental ones for the condensation of IIFC134a/HCFC123 mixtures ; in the experiment, the bulk mass fraction of HFC134a ranged from 0.35 to 0.85 kg/kg, and the mass velocity of 120 to 300 kg/(m^2s). Since the mass transfer characteristics in the vapor core are assumed to be expressed as Sh_v=0.046 Re^<0.8>_vSc^<0.3>_v, the predicted heat flux distribution along the tube axis is in good agreement with that of the experiment. The mass transfer characteristics during the condensation, determined by the prediction calculation, are also presented.
元の言語Japanese
ページ(範囲)3033-3040
ページ数8
ジャーナルNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
63
発行部数613
出版物ステータス出版済み - 9 25 1997
外部発表Yes

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refrigerants
Refrigerants
Condensation
condensation
Vapors
tubes
mass transfer
Mass transfer
predictions
vapors
liquid-vapor interfaces
Liquids
Phase equilibria
Heat flux
heat flux
Experiments
liquids

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水平平滑管内における二成分混合冷媒の凝縮特性の予測計算法. / 小山繁; 石橋晃; 兪堅.

:: Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, 巻 63, 番号 613, 25.09.1997, p. 3033-3040.

研究成果: ジャーナルへの寄稿記事

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abstract = "In the present study, a prediction model for condensation of binary refrigerant mixtures inside a horizontal smooth tube is proposed. In this model it is assumed that the phase equilibrium is only established at the vapor liquid interface, while the bulk vapor and the bulk liquid are in a nonequilibrium state. The predicted results are compared with the experimental ones for the condensation of IIFC134a/HCFC123 mixtures ; in the experiment, the bulk mass fraction of HFC134a ranged from 0.35 to 0.85 kg/kg, and the mass velocity of 120 to 300 kg/(m^2s). Since the mass transfer characteristics in the vapor core are assumed to be expressed as Sh_v=0.046 Re^<0.8>_vSc^<0.3>_v, the predicted heat flux distribution along the tube axis is in good agreement with that of the experiment. The mass transfer characteristics during the condensation, determined by the prediction calculation, are also presented.",
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T1 - 水平平滑管内における二成分混合冷媒の凝縮特性の予測計算法

AU - 小山, 繁

AU - 石橋, 晃

AU - 兪, 堅

PY - 1997/9/25

Y1 - 1997/9/25

N2 - In the present study, a prediction model for condensation of binary refrigerant mixtures inside a horizontal smooth tube is proposed. In this model it is assumed that the phase equilibrium is only established at the vapor liquid interface, while the bulk vapor and the bulk liquid are in a nonequilibrium state. The predicted results are compared with the experimental ones for the condensation of IIFC134a/HCFC123 mixtures ; in the experiment, the bulk mass fraction of HFC134a ranged from 0.35 to 0.85 kg/kg, and the mass velocity of 120 to 300 kg/(m^2s). Since the mass transfer characteristics in the vapor core are assumed to be expressed as Sh_v=0.046 Re^<0.8>_vSc^<0.3>_v, the predicted heat flux distribution along the tube axis is in good agreement with that of the experiment. The mass transfer characteristics during the condensation, determined by the prediction calculation, are also presented.

AB - In the present study, a prediction model for condensation of binary refrigerant mixtures inside a horizontal smooth tube is proposed. In this model it is assumed that the phase equilibrium is only established at the vapor liquid interface, while the bulk vapor and the bulk liquid are in a nonequilibrium state. The predicted results are compared with the experimental ones for the condensation of IIFC134a/HCFC123 mixtures ; in the experiment, the bulk mass fraction of HFC134a ranged from 0.35 to 0.85 kg/kg, and the mass velocity of 120 to 300 kg/(m^2s). Since the mass transfer characteristics in the vapor core are assumed to be expressed as Sh_v=0.046 Re^<0.8>_vSc^<0.3>_v, the predicted heat flux distribution along the tube axis is in good agreement with that of the experiment. The mass transfer characteristics during the condensation, determined by the prediction calculation, are also presented.

M3 - 記事

VL - 63

SP - 3033

EP - 3040

JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

SN - 0387-5016

IS - 613

ER -