Numerical analysis and optimization of falling film evaporation with tangential inlet for saline wastewater treatment

Liu, Youle; Li, Fēi; Zhang, You; Li, Huashan; Gao, Yu; Jiang, Qi; Xue, Junmin; Liu, Bing

doi:10.1016/j.watcyc.2023.07.001

Cited by 3 publications

(1 citation statement)

References 23 publications

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“…They concluded that adding the nanoparticles into the liquid film increased the evaporation rate due to the change in thermophysical properties. Examples of other recent works in this area are studies investigating the effects of surface structure and inlet swirling flow on evaporation heat transfer and efficiency of the liquid falling film systems inside vertical tubes [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

A Two-Phase Sharp-Interface Numerical Model of Falling Film Thermal Desalination in a Vertical Channel

Tohidi,

Ormiston

2024

Preprint

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A two-dimensional, sharp-interface two-phase laminar flow numerical model for evaporation from a saltwater falling liquid film with a co-current humid air flow on the interior of a parallel plate vertical channel is presented. The elliptic governing equations in both phases are solved simultaneously in an implicit, fully coupled approach. The liquid-gas interface is tracked precisely on an automatically adjusted non-orthogonal structured mesh. The basis of the evaporation model is validated for pure water falling film evaporation. A parametric study of evaporation from a saltwater falling film is presented. The study varies the inlet salinity of the film, the inlet liquid Reynolds number, the wall heat flux, and the air relative humidity. The effects of these variations on quantities such as the evaporation rate, the axial velocity, the salinity in the film, and the temperature are presented. The results demonstrate the capablity of the new model to predict the details of falling film thermal desalination.

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Section: Introductionmentioning

confidence: 99%

A Two-Phase Sharp-Interface Numerical Model of Falling Film Thermal Desalination in a Vertical Channel

Tohidi,

Ormiston

2024

Preprint

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Investigating the effect of effective parameters on the optimization of zero liquid discharge system

Mohammadi,

Ahmadi,

Ehsani

2024

International Journal of Low-Carbon Technologies

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Due to the critical water situation in the world and the need for freshwater, the use of desalination systems is very common. One of the main problems of using such devices is the production of a high-concentration brine stream, which causes environmental problems. Therefore, the need to use systems that reduce the level of salt water to zero (zero liquid discharge [ZLD]) is felt more than ever. The biggest challenge for the widespread implementation of thermal ZLD systems is its high energy consumption and, as a result, high cost. Therefore, we seek to find effective parameters to reduce the heat transfer surface and energy consumption to make it economic. In this research, it is possible to mention the inlet and outlet salinity, Overall heat transfer coefficients, evaporator temperature and cooling water temperature among the parameters investigated in the evaporator and the parameters investigated in the crystallizer include the operating temperature of the crystallizer and steam temperature in the heat exchanger. The results showed that the most optimal state (the lowest total heat transfer surface and energy consumption) of the ZLD system in the overall heat transfer coefficient in the evaporator is equal to 4 kW/m2 °C. The total heat transfer surface is equal to 2258.78 m2 and energy consumption is 2111.5 kW.

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A Two-Phase Sharp-Interface Numerical Model of Falling Film Thermal Desalination in a Vertical Channel

Tohidi,

Ormiston

2023

Preprint

View full text Add to dashboard Cite

Numerical analysis and optimization of falling film evaporation with tangential inlet for saline wastewater treatment

Cited by 3 publications

References 23 publications

A Two-Phase Sharp-Interface Numerical Model of Falling Film Thermal Desalination in a Vertical Channel

A Two-Phase Sharp-Interface Numerical Model of Falling Film Thermal Desalination in a Vertical Channel

Investigating the effect of effective parameters on the optimization of zero liquid discharge system

A Two-Phase Sharp-Interface Numerical Model of Falling Film Thermal Desalination in a Vertical Channel

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