Simulation of heat and mass transfer in a multi-effect distillation plant for seawater desalination

Raach, Henning; Mitrovic, Jovan

doi:10.1016/j.desal.2006.04.037

Cited by 22 publications

(4 citation statements)

References 2 publications

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“…They showed that the salt mass fraction increases close to the interface due to evaporation of liquid water into the gas phase and to impermeabily to salt. Raach and Mitrovic [21] also used a conjugate heat transfer model of seawater falling film evaporation on a vertical plate that was heated by condensing water vapour. They examined the heat transfer between the condensing water film and the evaporating seawater flowing on each side of a conductive metallic plate.…”

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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“…The former class of techniques includes Multi-Stage Flash (MSF) [2], Multi-Effect Desalination (MFD) [3] and Mechanical Vapor Compression (MVC) [4,5]; while the latter type comprises Reverse Osmosis (RO) [6] and Electro-Dialysis Reversal (EDR). These technologies used electrical power [7,8] which is an environmental concern because a large portion of this power is generated by coal or gas based power plants.…”

Section: Introductionmentioning

confidence: 99%

Numerical study of a double-slope solar still coupled with capillary film condenser in south Algeria

Belhadj

Bouguettaia

Marif

et al. 2015

Energy Conversion and Management

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“…Some of these researches included modeling and simulation of the evaporation process, and others focused on the performance of the system with changing parameters. The work of Raach and Mitrovic presented model development of evaporating falling fi lm over a vertical plate heated by steam in multi effect desalination (MED) plant [1]. Nusselt's theory was utilized to obtain the velocity profi le and the temperature distribution.…”

Section: Introductionmentioning

confidence: 99%

Study of falling film evaporation process in a vapor compression desalination system

Bahar

Hawlader

2012

Desalination and Water Treatment

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A B S T R AC TAn analysis of falling fi lm evaporation of saltwater has been carried out for a vapor compression desalination pilot plant. Detailed modeling and simulation have been used to fi nd the temperature and concentration variation inside the fi lm on a vertical tube evaporator. The heat and mass transfer phenomenon were analyzed using basic conservation equations. To evaluate the performance of the rig, three operating variables were considered, which included the top brine temperature (TBT), compressor speed and brine concentration. Performance of the rig was dominated by compressor speed and top brine temperature. The highest distillate production rate experimentally obtained was 20 kg/h for the compressor speed of 2400 rpm at a TBT of 102 o C. From the simulation, it was found that the feed concentration rapidly increased near the falling fi lm-vapor interface. The numerical results have been compared with the experimental values in terms of distillate produced, and good agreement was found.

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Simulation of heat and mass transfer in a multi-effect distillation plant for seawater desalination

Cited by 22 publications

References 2 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

Numerical study of a double-slope solar still coupled with capillary film condenser in south Algeria

Study of falling film evaporation process in a vapor compression desalination system

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