Gravity Controlled Condensation of an Ethanol and Water Mixture on a Horizontal Tube

Tetsu Fujii; Shigeru Koyama; Youichi Simizu; Masaharu Watabe; Yoshiro Nakamura

doi:10.1299/kikaib.55.210

Gravity Controlled Condensation of an Ethanol and Water Mixture on a Horizontal Tube

Tetsu Fujii, Shigeru Koyama, Youichi Simizu, Masaharu Watabe, Yoshiro Nakamura

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30 Citations (Scopus)

Abstract

The experimental results for gravity-controlled condensation of ethanol and water vapor mixtures on a horizontal tube are presented. Dropwise, drop and streak, and ring wise condensations are observed for the ranges of ethanol vapor mass fraction W_1∞>=0.2∼0.5, 0.5∼0.7 and 0.75∼0.8, respectively, while smooth-film condensation takes place for the ranges of W_1∞=0∼0.2 and W_1∞=0.8∼1. Previous theoritical results for the heat transfer coefficent by the present authors based on the two-phase boundary layer theory are valid for the case of smooth-film condensation, while 20 to 60% higher heat transfer coefficient values are obtained for the other cases.

Original language	English
Pages (from-to)	210-215
Number of pages	6
Journal	Transactions of the Japan Society of Mechanical Engineers Series B
Volume	55
Issue number	509
DOIs	https://doi.org/10.1299/kikaib.55.210
Publication status	Published - 1989

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Mechanical Engineering

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title = "Gravity Controlled Condensation of an Ethanol and Water Mixture on a Horizontal Tube",

abstract = "The experimental results for gravity-controlled condensation of ethanol and water vapor mixtures on a horizontal tube are presented. Dropwise, drop and streak, and ring wise condensations are observed for the ranges of ethanol vapor mass fraction W1∞>=0.2∼0.5, 0.5∼0.7 and 0.75∼0.8, respectively, while smooth-film condensation takes place for the ranges of W1∞=0∼0.2 and W1∞=0.8∼1. Previous theoritical results for the heat transfer coefficent by the present authors based on the two-phase boundary layer theory are valid for the case of smooth-film condensation, while 20 to 60% higher heat transfer coefficient values are obtained for the other cases.",

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T1 - Gravity Controlled Condensation of an Ethanol and Water Mixture on a Horizontal Tube

AU - Fujii, Tetsu

AU - Koyama, Shigeru

AU - Simizu, Youichi

AU - Watabe, Masaharu

AU - Nakamura, Yoshiro

PY - 1989

Y1 - 1989

N2 - The experimental results for gravity-controlled condensation of ethanol and water vapor mixtures on a horizontal tube are presented. Dropwise, drop and streak, and ring wise condensations are observed for the ranges of ethanol vapor mass fraction W1∞>=0.2∼0.5, 0.5∼0.7 and 0.75∼0.8, respectively, while smooth-film condensation takes place for the ranges of W1∞=0∼0.2 and W1∞=0.8∼1. Previous theoritical results for the heat transfer coefficent by the present authors based on the two-phase boundary layer theory are valid for the case of smooth-film condensation, while 20 to 60% higher heat transfer coefficient values are obtained for the other cases.

AB - The experimental results for gravity-controlled condensation of ethanol and water vapor mixtures on a horizontal tube are presented. Dropwise, drop and streak, and ring wise condensations are observed for the ranges of ethanol vapor mass fraction W1∞>=0.2∼0.5, 0.5∼0.7 and 0.75∼0.8, respectively, while smooth-film condensation takes place for the ranges of W1∞=0∼0.2 and W1∞=0.8∼1. Previous theoritical results for the heat transfer coefficent by the present authors based on the two-phase boundary layer theory are valid for the case of smooth-film condensation, while 20 to 60% higher heat transfer coefficient values are obtained for the other cases.

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Gravity Controlled Condensation of an Ethanol and Water Mixture on a Horizontal Tube

Abstract

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