INFLUENCE OF TUBE SPACING AND FLOW RATE ON HEAT TRANSFER FROM A HORIZONTAL TUBE TO A FALLING LIQUID FILM

1986 ◽  
Author(s):  
Jovan Mitrovic
Keyword(s):  
Heat Transfer ◽  
Liquid Film ◽  
Flow Rate ◽  
Horizontal Tube ◽  
Falling Liquid Film

Performance Model for a Horizontal Tube Falling Film Evaporator in a Desalination Unit

Volume 3 ◽  
2004 ◽  
Author(s):  
Rohit Sharma ◽  
Sushanta K. Mitra
Keyword(s):  
Heat Transfer ◽  
Liquid Film ◽  
Flow Rate ◽  
Distribution System ◽  
Water Distribution ◽  
Horizontal Tube ◽  
Spatial Arrangement ◽  
Performance Model ◽  
Heat Transfer Characteristics ◽  
Transfer Characteristics

A model has been developed to predict the evaporative heat transfer coefficient in a horizontal tube falling evaporator and has been applied to evaluate overall performance of a desalination unit. Performance variation with different parameters like operation pressure, temperature, tube diameter, spatial arrangement of the tubes and the type of water distribution system has been studied. Also, variation of the mass flow rate of distilled water inside the exchanger is analyzed. The predicted transfer characteristics obtained from the simulations are compared with the experimental data. It has been observed that the model is able to predict the trends of heat transfer characteristics of the evaporator reasonably well. However, at low liquid film flow rate conditions, the model over predicts the heat transfer characteristics marginally. In order to improve the evaporative exchanger performance, it is observed that preheating of the liquid film before injection into the evaporator is desirable.

scholarly journals Heat transfer in the falling liquid film on an array of horizontal tubes with MAO coating

2020 ◽  
Vol 1677 ◽  
pp. 012091
Author(s):  
A N Pavlenko ◽  
N I Pecherkin ◽  
O A Volodin ◽  
A I Kataev ◽  
I B Mironova
Keyword(s):  
Heat Transfer ◽  
Liquid Film ◽  
Horizontal Tubes ◽  
Falling Liquid Film

scholarly journals Modeling of conjugated heat and mass transfer in the entrance region of falling liquid film at various values of the Froude number

2018 ◽  
Vol 194 ◽  
pp. 01007
Author(s):  
Maria V. Bartashevich
Keyword(s):  
Heat Transfer ◽  
Mass Transfer ◽  
Liquid Film ◽  
Froude Number ◽  
Heat And Mass Transfer ◽  
Water Solution ◽  
Lithium Bromide ◽  
Entrance Region ◽  
Falling Film ◽  
Falling Liquid Film

Mathematical model of conjugated heat and mass transfer in absorption on the entrance region of the semi-infinite liquid film of lithium bromide water solution is investigated for different values of Froude number. The calculations shown that larger values of Froude number corresponds to a smaller thickness of the falling film. It was demonstrated that for large values of the Froude number the heat transfer from the surface is greater than for smaller values.

Peripheral heat transfer prediction of the subcooled falling liquid film on a horizontal smooth tube

2021 ◽  
Vol 33 (10) ◽  
pp. 102104
Author(s):  
Chuang-Yao Zhao ◽  
Di Qi ◽  
Qiong-Tao Li ◽  
Pu-Hang Jin ◽  
Wen-Tao Ji ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Liquid Film ◽  
Smooth Tube ◽  
Falling Liquid Film

An Investigation of the Liquid Distribution in Annular-Mist Flow

1970 ◽  
Vol 92 (4) ◽  
pp. 651-658 ◽  
Author(s):  
J. T. Pogson ◽  
J. H. Roberts ◽  
P. J. Waibler
Keyword(s):  
Heat Transfer ◽  
Film Thickness ◽  
Liquid Film ◽  
Flow Rate ◽  
Droplet Size Distribution ◽  
Correlation Equation ◽  
Vapor Flow ◽  
Two Phase ◽  
Liquid Distribution ◽  
Liquid Film Flow

The results of an experimental investigation of the average liquid film thickness are presented for vertical upward annular-mist two-phase flow, with and without heat transfer. The effects on the film thickness for variations in vapor flow rate, liquid flow rate, vapor density, and heat transfer are described. A correlation equation is presented for the local time-averaged thickness and for the droplet size distribution. In addition, an equation is given for the liquid film flow rate as a function of the average film thickness.

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