Computational fluid dynamics simulations of direct contact heat and mass transfer of a multicomponent two-phase film flow in an inclined channel at sub-atmospheric pressure

Cui, Xiaoti; Li, Xingang; Li, Hong

doi:10.1016/j.ijheatmasstransfer.2012.05.077

Cited by 27 publications

(6 citation statements)

References 20 publications

(33 reference statements)

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“…Modeling the phase change phenomenon of the multicomponent real LNG mixture at subcritical pressure is another challenge. Considering the phase change model for a pure fluid , the liquid‐vapor interfacial mass transfer for a multicomponent mixture can be expressed in a similar kinetic form with the driving force from the difference between the saturated and interfacial temperatures . The utilized equation of state is vital for the prediction accuracy of the saturated temperature for the LNG mixture, i.e., the dew and bubble points.…”

Section: Thermal Dynamic Analysismentioning

confidence: 99%

Design of an Intermediate Fluid Vaporizer for Liquefied Natural Gas

Chen

Fan

2017

Chem Eng & Technol

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The intermediate fluid vaporizer (IFV) owns various advantages over other types of liquefied natural gas (LNG) vaporizers. Research findings related to the design of an IFV, including configurational variations, selection of candidate working fluids, one‐dimensional steady‐state thermal model, computational fluid dynamics (CFD) model for thermal dynamic analysis, and cold energy recovery have been reviewed. Further updates to the current one‐dimensional thermal model are needed. A three‐dimensional unsteady CFD model should be established for the instantaneous flow and heat transfer analysis. Integrating the LNG regasification and cold energy recovery will bring more complexity in process design, optimization, and operation.

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Section: Thermal Dynamic Analysismentioning

confidence: 99%

Design of an Intermediate Fluid Vaporizer for Liquefied Natural Gas

Chen

Fan

2017

Chem Eng & Technol

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“…Furthermore, this approach can simulate applications of reactive flows according to the stoichiometry of the ongoing chemical reactions (e.g., combustion of a hydrocarbon for air heating). The multicomponent theory generally finds applications in petroleum distillation [39,40], while the available literature lacks references for applications to convective drying.…”

Section: Introductionmentioning

confidence: 99%

Off-Design Exergy Analysis of Convective Drying Using a Two-Phase Multispecies Model

Aquino

Poesio

2021

Energies

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The design of a convective drying cycle could be challenging because its thermodynamic performance depends on a wide range of operating parameters. Further, the initial product properties and environmental conditions fluctuate during the production, affecting the final product quality, environmental impact, and energy usage. An off-design analysis distinguishes the effects of different parameters defining the setup with the best and more stable performance. This study analyzes a reference scenario configured as an existing system and three system upgrades to recover the supplied energy and avoid heat and air dumping in the atmosphere. We calculate their performance for different seasons, initial product moisture, input/output rate, and two products. The analysis comprises 16 simulation cases, the solutions of a two-phase multispecies Euler–Euler model that simulates the thermodynamic equilibrium in all components. Results discuss the combination of parameters that maximizes the evaporation rate and produces the highest benefits on global performance up to doubling the reference levels. The advantages of heat recovery vary by the amount of wasted energy, increasing the exergy efficiency by a maximum of 17%. Energy needs for air recirculation cut the performance at least by 50%. Concluding remarks present the technical guidelines to reduce energy use and optimize production.

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“…The experimental data were surface temperature and size regression with time for droplets suspended on a small-diameter pipe in a hot-air environment under convective flow conditions. Cui et al (Cui, 2012) carried out a numerical study of direct-contact heat and mass transfer of a multicomponent two-phase film flow in an inclined channel at subatmospheric pressure. The process in the channel includes direct-contact condensation of hydrocarbon mixtures, with and without noncondensable gas, and the effect of distillation.…”

Section: Introductionmentioning

confidence: 99%