Experimental study on the interfacial wave and local heat transfer coefficient of stable steam jet condensation in a rectangular mix chamber

•Interfacial wave and local heat transfer coefficient of steam jet condensation.•Empirical correlation for predicting the dimensionless wave amplitude.•Interfacial fluctuation promotes steam jet condensation heat transfer coefficients. An experimental study on the interfacial wave and local heat tra...

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Bibliographic Details
Published in:International journal of heat and mass transfer 2018-12, Vol.127, p.1096-1101
Main Authors: Zong, Xiao, Liu, Ji-ping, Yan, Jun-jie
Format: Article
Language:English
Subjects:
Amplitudes
Condensation
Correlation analysis
Dimensionless analysis
Direct contact condensation
Empirical analysis
Heat transfer
Heat transfer coefficient
Heat transfer coefficients
Interfacial wave
Steam jets
Variations
Water flow
Water temperature
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Summary:•Interfacial wave and local heat transfer coefficient of steam jet condensation.•Empirical correlation for predicting the dimensionless wave amplitude.•Interfacial fluctuation promotes steam jet condensation heat transfer coefficients. An experimental study on the interfacial wave and local heat transfer coefficient of stable steam jet condensation in a rectangular mix chamber was carried out. In experiments, the interfacial wave amplitude was obtained and analyzed, and an empirical correlation predicting the dimensionless wave amplitude was established. To evaluate the local average heat transfer coefficient, a thermal equilibrium model was developed, and the local average heat transfer characteristics were obtained and discussed. The results indicate that the interfacial wave amplitude increases with water mass flux and the axial dimensionless position, decreases with the steam mass flux, and changes little with inlet water temperature. The local average heat transfer coefficients are within the range of 0.98–6.24 MW/m2 °C, and they increase with the interfacial wave amplitude. The interfacial fluctuation could promote the steam jet condensation and corresponding heat transfer coefficients.
ISSN:0017-9310
1879-2189
DOI:10.1016/j.ijheatmasstransfer.2018.07.115