Analysis of a hybrid Thermal Vapor Compression and Reverse Osmosis desalination system at variable design conditions

Cao, Zheng; Deng, Jianqiang; Ye, Fanghua; Garris, Charles A.

doi:10.1016/j.desal.2018.03.019

“…Several studies in the literature have proposed hybridizing RO with other desalination technologies for various reasons such as reducing water costs, energy consumption, membrane scaling or to better manage brine discharge [35][36][37][38][39][40][41][42][43][44]. Hybridizing RO with ED has been discussed previously for brackish water desalination [35,38,[45][46][47], co-production of salt and water from seawater [36,37,[48][49][50][51][52] and for industrial water treatment [41].…”

Section: Introductionmentioning

confidence: 99%

Cost and energy needs of RO-ED-crystallizer systems for zero brine discharge seawater desalination

Nayar

¹

,

Fernandes

²

,

McGovern

³

et al. 2019

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A zero brine discharge seawater desalination concept integrating reverse osmosis (RO), electrodialysis (ED) and crystallizer into a single system (REC) is presented. Analytical models were used to optimize parameters and minimize water production costs. Parameters varied were: the ratio of seawater to RO brine in the ED diluate channel, ED current density, ED diluate outlet salinity, electricity and salt prices, and RO recovery by adding high pressure RO (HPRO). Using only RO brine instead of only seawater in the ED diluate channel reduced water production costs by 87% from 27 to 3.5 $/m 3 while increasing salt production costs 26% from 135 to 170 $/tonne-salt. The former was best for brine minimization, and the latter for salt production.Optimizing ED current density reduced REC costs by another 14% to 3.0 $/m 3 while increasing specific energy consumption 26% to 12.7 kWh e /m 3 , corresponding to a Second Law efficiency of 18%. Adding an HPRO stage was uneconomical as it increased specific costs 21%. A salt price of 104.5 $/tonne-salt will justify the cost of adding an ED-crystallizer. REC systems may be economically feasible in parts of the Middle-East. Producing other products such as Mg(OH) 2 or Br 2 may further improve economics. , "Cost and energy needs of RO-ED crystallizer systems for zero brine discharge seawater desalination," Desalination, online

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“…Hybrid VCD systems with non-thermal technologies are still in the research and development stages. For TVC-RO systems, the simulations indicate that better performances are obtained when they are configured in series and not in parallel and independent form [149]. Even if the configuration is MED-TVC-Reverse Osmosis, energy loss can be significantly reduced [150].…”

Section: Vapor Compression Distillation (Vcd)mentioning

confidence: 94%

Commercial Thermal Technologies for Desalination of Water from Renewable Energies: A State of the Art Review

Feria-Díaz

¹

,

López-Méndez

²

,

Rodríguez-Miranda

³

et al. 2021

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Thermal desalination is yet a reliable technology in the treatment of brackish water and seawater; however, its demanding high energy requirements have lagged it compared to other non-thermal technologies such as reverse osmosis. This review provides an outline of the development and trends of the three most commercially used thermal or phase change technologies worldwide: Multi Effect Distillation (MED), Multi Stage Flash (MSF), and Vapor Compression Distillation (VCD). First, state of water stress suffered by regions with little fresh water availability and existing desalination technologies that could become an alternative solution are shown. The most recent studies published for each commercial thermal technology are presented, focusing on optimizing the desalination process, improving efficiencies, and reducing energy demands. Then, an overview of the use of renewable energy and its potential for integration into both commercial and non-commercial desalination systems is shown. Finally, research trends and their orientation towards hybridization of technologies and use of renewable energies as a relevant alternative to the current problems of brackish water desalination are discussed. This reflective and updated review will help researchers to have a detailed state of the art of the subject and to have a starting point for their research, since current advances and trends on thermal desalination are shown.

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“…The developed model showed that disequilibrium condensations play a crucial role in the performance analysis of steam ejectors for MED-TVC. Xue et al, 2020 [124] Design and research of a two-stage vacuum ejector to improve performance of the MED + TVC desalination system [123,124,128,129,132,138], mathematical modeling of MVC coupled with MED [127,137,141], and hybridization systems of MVC [144,145] and TVC [131,139] with other desalination technologies.…”

Section: Vapor Compression System (Se-mvc)mentioning

confidence: 99%

Commercial Thermal Technologies for Desalination of Water from Renewable Energies: A State of the Art Review

Feria-Díaz¹,

López-Méndez²,

Sandoval-Herazo³

et al. 2021

Preprint

10

0

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Thermal desalination is yet a reliable technology in the treatment of brackish water and seawater; however, its demanding high energy requirements have lagged it compared to other non-thermal technologies such as reverse osmosis. This review provides an outline of the development and trends of the three most commercially used thermal or phase change technologies worldwide: Multi Effect Distillation (MED), Multi Stage Flash (MSF), and Vapor Compression Distillation (VCD). First, state of water stress suffered by regions with little fresh water availability and existing desalination technologies that could become an alternative solution are shown. The most recent studies published for each commercial thermal technology are presented, focusing on optimizing the desalination process, improving efficiencies, and reducing energy demands. Then, an overview of the use of renewable energy and its potential for integration into both commercial and non-commercial desalination systems is shown. Finally, research trends and their orientation towards hybridization of technologies and use of renewable energies as a relevant alternative to the current problems of brackish water desalination are discussed. This reflective and updated review will help researchers to have a detailed state of the art of the subject and to have a starting point for their research, since current advances and trends on thermal desalination are shown.

show abstract

Analysis of a hybrid Thermal Vapor Compression and Reverse Osmosis desalination system at variable design conditions

Cited by 19 publications

References 35 publications

Cost and energy needs of RO-ED-crystallizer systems for zero brine discharge seawater desalination

Cost and energy needs of RO-ED-crystallizer systems for zero brine discharge seawater desalination

Commercial Thermal Technologies for Desalination of Water from Renewable Energies: A State of the Art Review

Commercial Thermal Technologies for Desalination of Water from Renewable Energies: A State of the Art Review

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