Surface tension of lithium bromide solutions with heat-transfer additives

1991 ◽  
Vol 36 (1) ◽  
pp. 96-98 ◽  
Author(s):  
Wen Yao ◽  
Henrik Bjurstroem ◽  
Fredrik Setterwall
Keyword(s):  
Heat Transfer ◽  
Surface Tension ◽  
Lithium Bromide ◽  
Bromide Solutions

Numerical Analysis of Heat Transfer of a Flow Confined by Wire Screen in Lithium Bromide Absorption Process

2014 ◽  
Vol 348 ◽  
pp. 40-50 ◽  
Author(s):  
Herbert Obame Mve ◽  
Romuald Rullière ◽  
Rémi Goulet ◽  
Phillippe Haberschill
Keyword(s):  
Heat Transfer ◽  
Surface Tension ◽  
Numerical Analysis ◽  
Lithium Bromide ◽  
Surface Tension Force ◽  
Surface Force ◽  
Geometrical Parameters ◽  
Force Model ◽  
Vof Model ◽  
Static Contact

The present study deals with the numerical analysis of heat transfer inside a lithium bromide solution flowing down between finely meshed plastic wire screens. These screens confine the flow through capillary action while allowing the water vapor transfer inside an innovative absorber technology. The complex menisci shape formed on the confinement grid level, where the surface tension forces are of first importance, are reconstructed by a volume of fluid (VOF) model. A continuum surface force model is used to account for the surface tension force. A static contact angle is used to define the wall adhesion. A new algorithm, consisting to set an unique constant temperature at the liquid/vapour interface and to determine the evolution of heat transfer characteristics over the simulation domain, has been implemented and validated by analytical solutions. A parametric study has been conducted to determine the effect of the inlet velocity and the geometrical parameters (wire diameter and the number of divisions).

THE STABILITY ANALYSIS OF HEAT TRANSFER IN SATURATED LIQUID FILM OF THE SPECIAL MATERIALS

2005 ◽  
Vol 19 (28n29) ◽  
pp. 1547-1550
Author(s):  
YOULIANG CHENG ◽  
XIN LI ◽  
ZHONGYAO FAN ◽  
BOFEN YING
Keyword(s):  
Heat Transfer ◽  
Differential Equation ◽  
Surface Tension ◽  
Stability Analysis ◽  
Liquid Film ◽  
Nonlinear Relationship ◽  
Saturated Liquid ◽  
Nonlinear Surface ◽  
Isothermal Wall ◽  
The Stability

Representing surface tension by nonlinear relationship on temperature, the boundary value problem of linear stability differential equation on small perturbation is derived. Under the condition of the isothermal wall the effects of nonlinear surface tension on stability of heat transfer in saturated liquid film of different liquid low boiling point gases are investigated as wall temperature is varied.

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.

Effect of Aqueous Lithium Bromide Solutions on the Corrosion Resistance and Galvanic Behavior of Copper-Nickel Alloys

CORROSION ◽  
2003 ◽  
Vol 59 (1) ◽  
pp. 32-41 ◽  
Author(s):  
A. Igual Muñoz ◽  
J. García Antón ◽  
J. L. Guiñón ◽  
V. Pérez Herranz
Keyword(s):  
Corrosion Resistance ◽  
Nickel Alloys ◽  
Lithium Bromide ◽  
Copper Nickel ◽  
Aqueous Lithium Bromide ◽  
Bromide Solutions

Condensation of Low-Surface-Tension Fluids on Microstructured Surfaces at Low Temperature

2017 ◽  
Author(s):  
Abulimiti Aili ◽  
Qiaoyu Ge ◽  
TieJun Zhang
Keyword(s):  
Heat Transfer ◽  
Surface Tension ◽  
Low Temperature ◽  
High Surface ◽  
Condensation Heat Transfer ◽  
Lubricant Oil ◽  
Microstructured Surfaces ◽  
Performance Deterioration ◽  
Coated Surface ◽  
Coated Surfaces

Filmwise condensation of a low surface tension fluid (i.e. refrigerant) on microstructured aluminum surfaces is studied to investigate the effect of the structures on condensation heat transfer at low temperature. The hypothesis is that the structures may cause thinning of the condensate film at micro-scales, thus resulting in an enhancement of condensation heat transfer. However, the structures may also decrease the mobility of the condensate near the surface due to increased friction, thus potentially leading to performance deterioration. The aim of this work is to investigate which of the two counteracting mechanisms dominate during filmwise condensation. Condensation experiments are carried out in a low-temperature vacuum chamber. Compared with the Nusselt model of condensation, the microstructured surfaces, either coated or uncoated, show similar performance, with potentially slight enhancement at low subcooling degree and slight deterioration at high subcooling degree. When the microstructured and silane-coated surface is infused with a non-volatile and very low-surface-tension lubricant oil, the lubricant is displaced by the condensate and there is almost no change in the condensation performance. Our results show that, unlike the case of dropwise condensation of high-surface tension fluids, microstructured and coated surfaces with/without infusing oil is not exciting to enhanced filmwise condensation of low-surface-tension fluids.

Corrosion Behavior and Galvanic Studies of Brass and Bronzes in Aqueous Lithium Bromide Solutions

CORROSION ◽  
2002 ◽  
Vol 58 (7) ◽  
pp. 560-569 ◽  
Author(s):  
A. Igual Muñoz ◽  
J. Garcia Antón ◽  
J. L. Guiñón ◽  
V. Pérez Herranz
Keyword(s):  
Corrosion Behavior ◽  
Lithium Bromide ◽  
Aqueous Lithium Bromide ◽  
Bromide Solutions
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