Concentrated seawater brines for use in solar-powered desiccant cooling cycles

Lychnos, George; Amdouni, Ridha; Davies, Philip A.

doi:10.1039/c2ra21414h

Cited by 8 publications

(5 citation statements)

References 10 publications

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“…The production seems excessive even considering increased demand due to new applications, e.g. in refrigeration through solar liquid desiccation ( Lychnos et al., 2012 ). Similar considerations apply to Br and Mg, although the latter may have a higher economic interest.…”

Section: Is Resource Recovery a Game Changer For Desalination?mentioning

confidence: 99%

Can seawater desalination be a win-win fix to our water cycle?

et al. 2020

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While we increasingly turn to desalination as a secure water supply, it is still perceived as an expensive and environmentally damaging solution, affordable only for affluent societies. In this contribution, we recast desalination from one of a last resort to a far-reaching, climate change mitigating, water security solution. First, we argue that the benefits of desalination go beyond the single-use value of the water produced. If coupled with water reuse for irrigation, desalination reduces groundwater abstraction and augments the water cycle. As such, it may support both adaptation to, and mitigation of climate change impacts by deploying plentiful water for human use, with all the benefits that entails, while helping preserve and restore ecosystems. Second, we counter two arguments commonly raised against desalination, namely its environmental impact and high cost. The environmental impact can be fully controlled so as not to pose long-term threats, if driven by renewable energy. Desalination may then have a zero carbon footprint. Moreover, appropriately designed outfalls make the disposal of brine at sea compatible with marine ecosystems.. Recovery of energy, minerals and more water from brine reject (particularly in the form of vapour for cooling to enable more crops and vegetation to grow), while possible, is often hardly economically justified. However, resource recovery may become more attractive in the future, and help reduce the brine volumes to dispose of. When fresh water becomes scarce, its cost tends to go up, making desalination increasingly economic. Moreover, desalination can have virtually no environmental costs. Considering the environmental costs of over-abstraction of freshwater, desalination tilts the balance in its favour.

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Section: Is Resource Recovery a Game Changer For Desalination?mentioning

confidence: 99%

Can seawater desalination be a win-win fix to our water cycle?

et al. 2020

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“…Harvesting such brine is already standard practice in salt works and the salt by-product would have economic value. 8 However, the salt production from desalination at the scale discussed here would be huge. For example, the scenario of additional 30 billion m 3 per year desalination capacity with salt recovery would result in salt production of 1 billion t per year which is 4 times current global production.…”

Section: Process Design and Modellingmentioning

confidence: 94%

Solar thermal decomposition of desalination reject brine for carbon dioxide removal and neutralisation of ocean acidity

Davies

2015

Environ. Sci.: Water Res. Technol.

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“…Among the halide salts, the most used are concentrated LiBr, LiCl, CaCl2 and MgCl2 due to their low vapour pressures [9,26,31,36,42,[44][45][46][47][48][49][50]. Different studies employ LiBr, LiCl, CaCl2 [51][52][53][54][55] and MgCl2 [17,18,50,56] for LDAC applications. These studies show that LiCl is the most stable and efficient LD [57].…”

Section: Liquid Desiccants and Their Propertiesmentioning

confidence: 99%

“…This extends the optimal growing season for temperate and tropical crops from 3 to 6 and 7 to 12 months per year, respectively. Regarding numerical LDAC models for greenhouses, Lychnos et al [17] developed a simulation model to evaluate the cooling performance of a LDAC system using magnesium chloride. The simulation predicted an additional temperature drop of 3.4-4.2 °C, compared to evaporative cooling.…”

Section: Introductionmentioning

confidence: 99%