Hydrodynamics performance and tray efficiency analysis of the novel vertical spray packing tray

Zhao, Hongkang; Li, Lun; Wang, Baohua; Yu, Dan; Li, Qunsheng

doi:10.1016/j.cjche.2018.01.030

Cited by 11 publications

(12 citation statements)

References 19 publications

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“…𝐸 ª^= 0,492(𝜇 : 𝛼) '7,&/0 (5) где, 𝜇 : -вязкость жидкости, 𝛼 -относительная волатильность. В работах [44,45] предлагается новая тарелка, имеющая меньший перепад давления и большую эффективность по сравнению с тарелками известных конструкций (рисунок 3а, 3б). В работах [46,47], предлагается газожидкостный аппарат, который может быть использован как пенный абсорбер с противоточными тарелками (рисунок 3г).…”

Section: результаты поискаunclassified

Research trends in sieve trays and distillation and adsorbtion equipments

Ravichev¹,

Trushin²,

Yashin³

2021

Proceedings of the International Scientific and Technical Symposium «Improving Energy and Resource Efficiency and Environmental

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A review of publications on gas-liquid devices with a foam regime, published since 2000, generalizations of the main directions of interest to researchers and the results achieved. The main method for studying the foam layer has become computational fluid dynamics, however, the most common models are based on empirical equations for cross-flow trays with round holes. Apparatus with a movable nozzle and centrifugal foam apparatus - two areas of particular interest in the Russian Federation, but did not gain popularity in the world. The research uses new measuring methods: gamma scanning, Doppler interferometry and digital processing of high-speed photographs, spatial probes to determine the structure of the foam layer on industrial-scale trays.

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Section: результаты поискаunclassified

Research trends in sieve trays and distillation and adsorbtion equipments

Ravichev¹,

Trushin²,

Yashin³

2021

Proceedings of the International Scientific and Technical Symposium «Improving Energy and Resource Efficiency and Environmental

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“…19 The study found that the average froth height per gas load systematically increases with rising weir load. 20 Typically, increased froth height predisposes the system to flooding. The NEW VST tray enables gas−liquid flow in a jet state, reducing the tendency for the liquid phase to foam.…”

Section: Introductionmentioning

confidence: 99%

“…Within the column, the hydrodynamic performance significantly influences tray mass transfer efficiency. − To comprehensively grasp tray hydrodynamics, Vishwakarma et al conducted thorough hydrodynamic characterization of large sieve trays . The study found that the average froth height per gas load systematically increases with rising weir load . Typically, increased froth height predisposes the system to flooding.…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic Performance of an Axial Swirling Spray Tray with Guide Vanes

Zhang,

Fan,

Dai

et al. 2024

Ind. Eng. Chem. Res.

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This study introduces the design of an axial swirling spray tray (ASST) with guide vanes characterized by high flux and exceptional flexibility. The operational principles of the ASST are elucidated through an analysis of flow field distribution parameters, including pressure drop, velocity, and gas−liquid phase volume fraction, by using numerical simulation. Additionally, an experimental platform was constructed to examine the hydrodynamic performance of the ASST, and experiments were conducted using both the NEW VST and V-1 valve trays for comparison. The Levenberg−Marquardt optimization algorithm was utilized to derive the empirical formula for the dry tray pressure drop. The findings demonstrate that the ASST exhibits pressure drop characteristics, a wide range of gas-to-liquid ratios, and an operating flexibility up to 4.1. These features make it a practical solution for handling substantial loads of gas and liquid.

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“…All of these models rely on a priori estimates of LUE. Therefore, an understanding of LUE and its controls is usually necessary for studies on spatiotemporal variations in the global carbon cycle (Zhao et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Patterns and Controls of Light Use Efficiency in Four Contrasting Forest Ecosystems in Yunnan, Southwest China

et al. 2019

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Ecosystem light use efficiency (LUE) is a critical parameter in estimating CO 2 uptake by vegetation from climatological and satellite data. However, the spatiotemporal dynamics and biophysical regulations of ecosystem-level LUE are not well understood, resulting in large uncertainties in the estimation of gross primary productivity (GPP) using LUE-based models. In this study, we used eddy covariance to explore spatiotemporal variations and controls of LUE in four contrasting forest ecosystems (savanna, tropical rainforest, subtropical evergreen forest, and subalpine coniferous forest). Based on 27 site years of data, we found that (1) the multiyear mean LUE was 0.063, 0.251, 0.247, and 0.140 g C· mol photon −1 in the four contrasting ecosystems, respectively; (2) the LUE in the wet season (May-October) was higher than that in the dry season in all studied ecosystems; (3) the leaf area index controlled GPP and LUE significantly and explained 74%, 29%, 54%, and 36% of the variation in GPP and 51%, 19%, 41%, and 54% of the variation in LUE in the four contrasting ecosystems, respectively; (4) path analysis revealed the critical roles of GPP and vapor pressure deficit in controlling LUE in these four forest ecosystems; and (5) under warming scenarios, LUE may decrease in savanna but increase in the other three ecosystems, while decreasing precipitation (P) may reduce LUE in the ecosystems studied. This study improves our understanding of the influence of biophysical factors on LUE and demonstrates how LUE changes with variations in temperature, soil moisture, and leaf area index, thereby improving estimations of large-scale carbon exchange/cycling.

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Hydrodynamics performance and tray efficiency analysis of the novel vertical spray packing tray

Cited by 11 publications

References 19 publications

Research trends in sieve trays and distillation and adsorbtion equipments

Research trends in sieve trays and distillation and adsorbtion equipments

Hydrodynamic Performance of an Axial Swirling Spray Tray with Guide Vanes

Patterns and Controls of Light Use Efficiency in Four Contrasting Forest Ecosystems in Yunnan, Southwest China

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