Falling film heat transfer analysis on a bank of horizontal tube evaporator

AIChE Journal ◽  
1988 ◽  
Vol 34 (9) ◽  
pp. 1539-1549 ◽  
Author(s):  
G. Kocamustafaogullari ◽  
I. Y. Chen
Keyword(s):  
Heat Transfer ◽  
Horizontal Tube ◽  
Heat Transfer Analysis ◽  
Falling Film ◽  
Film Heat Transfer

Investigation on Intertube Falling-Film Heat Transfer and Mode Transitions of Aqueous-Alumina Nanofluids

2011 ◽  
Vol 133 (5) ◽  
Author(s):  
Binglu Ruan ◽  
Anthony M. Jacobi
Keyword(s):  
Heat Transfer ◽  
Horizontal Tube ◽  
Sodium Dodecylbenzene Sulfonate ◽  
Falling Film ◽  
Dodecylbenzene Sulfonate ◽  
Reynolds Number Increase ◽  
New Type ◽  
Aqueous Aluminum ◽  
Mode Transitions ◽  
Film Heat Transfer

Horizontal-tube falling-film heat transfer characteristics of aqueous aluminum oxide nanofluids at concentrations of 0 vol %, 0.05 vol %(0.20 wt %), 0.5 vol %(1.96 wt %), 1 vol %(3.86 wt %) (with and without sodium dodecylbenzene sulfonate), and 2 vol %(7.51 wt %) are investigated and compared with predictions developed for conventional fluids. The thermophysical properties of the nanofluids, including thermal conductivity, kinematic viscosity, and surface tension, are reported, as is the mode transition behavior of the nanofluids. The experimental results for heat transfer are in good agreement with predictions for falling-film flow and no unusual Nu enhancement was observed in the present studies. Additionally, a 20% mode transitional Reynolds number increase was recorded for transitions between sheets and jets and jet-droplet mode to droplet mode. Although the findings with water-alumina nanofluids are not encouraging with respect to heat transfer, the results extend nanofluid data to a new type of flow and may help improve our understanding of nanofluid behavior. Moreover, this work provides a basis for further work on falling-film nanofluids.

Numerical Simulation of the Liquid Flowing and Heat-Transfer outside the Tube of the Horizontal-Tube Falling Film Evaporator

2012 ◽  
Vol 614-615 ◽  
pp. 296-300 ◽  
Author(s):  
Wei Kang Hu ◽  
Li Yang ◽  
Lei Hong Guo
Keyword(s):  
Heat Transfer ◽  
Horizontal Tube ◽  
Water Desalination ◽  
Falling Film ◽  
Transfer Enhancement ◽  
Film Evaporation ◽  
Film Evaporator ◽  
Spray Density ◽  
Performance Of Heat Transfer ◽  
Falling Film Evaporation

This paper mainly studies the falling film evaporator in the field of water desalination. Using the method of fluent simulates the process of the liquid flowing and heat-transfer on the horizontal-tube falling film evaporation. The author analyses the distribution of the liquid film, and obtain the rule that spray density, evaporation temperature, temperature difference and pipe diameter affect the performance of heat-transfer in a certain range. So the paper plays a guiding role in heat transfer enhancement in the falling film evaporator.

Heat-transfer film coefficients of falling film horizontal tube evaporators

Desalination ◽  
2004 ◽  
Vol 166 ◽  
pp. 223-230 ◽  
Author(s):  
Li Xu ◽  
Murong Ge ◽  
Shichang Wang ◽  
Yuxin Wang
Keyword(s):  
Heat Transfer ◽  
Horizontal Tube ◽  
Transfer Film ◽  
Falling Film
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