Hydrodynamic characteristics of valve tray: Computational fluid dynamic simulation and experimental studies

Zarei, Taleb; Farsiani, Masoud; Khorshidi, Jamshid

doi:10.1007/s11814-016-0250-z

Cited by 18 publications

(16 citation statements)

References 18 publications

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“…Similar behaviors are also found in other experimental data . Figure a shows the good consistency of our experimental data with those in the literature despite the difference in the low hole velocity range.…”

Section: Resultssupporting

confidence: 91%

“…This difference is attributable to the variations in the fractional hole area. Zarei's experimental data are considerably larger than those of Banik and our experimental results when the gas velocity is less than 4 m s −1 . However, at a relatively high gas velocity of ~6.0 m s −1 , our experimental data are consistent with the experimental data of Banik and Zarei.…”

Section: Resultscontrasting

confidence: 80%

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Experimental study and modeling of weeping rate in rectangular large‐scale valve trays

et al. 2019

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Weeping is an important hydraulic parameter that needs to be considered for valve trays and for calculations in the distillation field. Therefore, the accurate prediction of weep rate is crucial for the optimal design of valve trays. First, the effects of gas and liquid loads and weir height on weep rate, tray pressure drop, and actual bubbling area were studied in a 1.5 m × 0.61 m cold simulator. Second, the weep modes on the valve tray were analyzed in detail. A theoretical model was then derived to calculate weeping. The model showed a clear relationship between the weep rate and the fractional bubbling area. The experimental data showed that the weir height substantially affected the orifice coefficient of the liquid passing through the valve. Finally, the relation between weir height and orifice coefficient was obtained by fitting the experimental data. The agreements were good, and the maximum deviations were approximately 25%.

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Section: Resultssupporting

confidence: 91%

Section: Resultscontrasting

confidence: 80%

Experimental study and modeling of weeping rate in rectangular large‐scale valve trays

et al. 2019

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“…The upper section is initiated from the test tray deck to the outlet zone, and the space under the test tray is the lower section where the liquid weeping appears under the special condition. The drag coefficient presented by Krishna et al [18], which is independent of the bubble diameter, is used in the upper space because of its extensive use by several researchers [18,19,30,33]. Moreover, the heterogeneous and froth bubbly regimes are found in this domain for specific gas velocities.…”

Section: Boundary Conditions and Geometrymentioning

confidence: 99%

“…Moreover, its operational flexibility was enhanced in comparison to the sieve tray. In [30], the hydraulics and flow patterns of a valve tray were predicted, utilizing a CFD simulation and an experimental method. A 3D CFD model was presented in the Eulerian framework.…”

Section: Introductionmentioning

confidence: 99%

Computational Fluid Dynamics versus Experiment: An Investigation on Liquid Weeping of Nye Trays

et al. 2020

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The weeping phenomenon was investigated using some experimental tests and a numerical model. The tests were performed within a 1.22‐m‐diameter pilot‐scale column including two chimney trays and two Nye test trays with an air‐water system. The rates of weeping were measured in the Nye trays with two heights of the weir and a hole area of 5 %. Moreover, the weeping rates in the outlet and inlet halves of the Nye tray and the total weeping rate were calculated. In the next step, an Eulerian‐Eulerian computational fluid dynamics (CFD) technique was used. The results show good agreement between the attained CFD findings and the experimental data.

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“…It is used by many industries to analyze, optimize, and verify the performance of systems before costly tests. [15][16][17] However, in very few studies, CFD tools have been used to simulate the HDH process. Saeed et al 18 conducted the CFD modeling of HDH process.…”

Section: Introductionmentioning

confidence: 99%

Experimental and computational fluid dynamics modeling of a novel tray humidifier column in humidification dehumidification desalination; evaluation of hydrodynamic and heat transfer characteristics

Zarei

Jahromi

Karachi

2020

Proceedings of the Institution of Mechanical Engineers, Part E:

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In this article, a novel tray humidifier column for humidification dehumidification desalination was proposed. The performance of the humidifier column has been investigated with experimental and computational fluid dynamics simulations. The hydrodynamics and heat transfer characteristics of this tray humidifier has been studied. A stainless steel sieve tray with a rectangular cross section with a dimension of 20 × 50 cm was used in the experimental study. In computational fluid dynamics modeling, a transient three-dimensional model has been developed based on the volume of fluid framework by using standard k-epsilon model. The effect of air and seawater flow rate and inlet seawater temperature on the exit air temperature has been investigated. The results show that the humidifier effectiveness of the tray humidifier column varies between 0.67 and 0.87 depending on operating conditions. Then, tray column can be used in humidification dehumidification desalination systems with advantages such as compact equipment, low-pressure drop, and handling solids or other sources of fouling.

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Hydrodynamic characteristics of valve tray: Computational fluid dynamic simulation and experimental studies

Cited by 18 publications

References 18 publications

Experimental study and modeling of weeping rate in rectangular large‐scale valve trays

Experimental study and modeling of weeping rate in rectangular large‐scale valve trays

Computational Fluid Dynamics versus Experiment: An Investigation on Liquid Weeping of Nye Trays

Experimental and computational fluid dynamics modeling of a novel tray humidifier column in humidification dehumidification desalination; evaluation of hydrodynamic and heat transfer characteristics

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