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Historic review and recent progress in internal design modification in solar stills

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Abstract

Solar still, which uses solar renewable energy sources, especially solar energy, to produce pure water, is a promising technology as it is abundantly available and eco-friendly. Researchers have innovated in internal and external designs to enhance distillate productivity in solar desalination systems. The present review paper discusses the major internal modifications done in history and recent past to enhance the distillate output. Six sub-sections have been developed concerning historic internal modifications that discuss types of basin liners, water depth, stones, dyes, phase change materials, and weirs. It has been found that among all the historic internal modifications, phase change materials were the most effective with distillate yield enhancement of up to 80%. The limitation in distillate yield made the researchers to perform further modifications to enhance the productivity, and hence, recent internal designs have also been discussed. Recent internal modifications have six sub-sections: fins, wicks, nanofluids, nanostructures, dynamic modifications, and natural materials. Among the recent, dynamic modifications were the most efficient with productivity enhancement of up to 300%, with a maximum cumulative yield of 8.78 kg/m2/day for the rotating wick solar still compared to CSS which gave only 2.21 kg/m2/day. Such a kind of review work has not been performed till date, which covers all the internal design modifications in one paper exhaustively. Furthermore, gaps have been identified, and future perspectives have been presented in the conclusion section. It has been observed that nanostructures, nanoparticles, and dynamic modifications are the most promising internal modifications in recent times that can boost distillate productivity to a greater degree.

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Abbreviations

AAM:

Anodic aluminum oxide membrane

BGG:

Black granite gravel

CNTs:

Carbon nanotubes

CSES:

Contactless solar evaporation structure

CSS:

Conventional solar still

DSSS:

Double slope solar still

FSS:

Fan solar still

IASS:

Inverted absorber solar still

K:

Thermal conductivity

LHTESS:

Latent heat thermal energy storage system

MDSSS:

Modified double-slope solar still

NIR:

Near-infrared

NPs:

Nanoparticles

PCM:

Phase change material

PDMS:

Polydimethylsiloxane

SS:

Solar still

SSSS:

Single slope solar still

PVD:

Physical vapor deposition

SEM:

Scanning electron microscope

WTSS:

Wick-type solar still

Wt%:

Weight percentage

WTCSS:

Weir-type cascade solar still

Al:

Aluminum

Ag:

Silver

Au:

Gold

Al2O3 :

Aluminum oxide

CuO:

Cupric oxide

Cu2O:

Cuprous oxide

CuSO4·5H2O:

Copper sulfate pentahydrate

Fe2O3 :

Iron oxide

GO:

Graphene

MnO2 :

Manganese dioxide

(NH4)2HPO4 :

Diammonium hydrogen phosphate

PdCl2 :

Palladium dichloride

SnO2 :

Tin oxide

TiO2 :

Titanium dioxide

ZnO:

Zinc oxide

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Acknowledgements

The authors are grateful to VNRVJIET for providing the time and facilities to write this article and also grateful to editors and reviewers for sparing their valuable time.

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Contributions

Literature search, writing—original draft preparation: Shaik Afzal Mohiuddin; ideas, writing—review, editing, and supervision: Ajay Kumar Kaviti; supervision: T. Srinivasa Rao; writing—review and editing: Vineet Singh Sikarwar.

Corresponding author

Correspondence to Ajay Kumar Kaviti.

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The authors declare no competing interests.

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Responsible Editor: Philippe Garrigues

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Highlights

• The methodology was adopted for advances in internal design modifications of solar still.

• Historical and recent internal design modifications have been discussed exhaustively.

• Historical and recent modifications enhanced the distillate yield of up to 80% and 300%.

• Nanostructures, nanoparticles, and contactless structures are the current hotspots.

• Future perspectives in internal design modifications have been discussed.

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Mohiuddin, S.A., Kaviti, A.K., Rao, T.S. et al. Historic review and recent progress in internal design modification in solar stills. Environ Sci Pollut Res 29, 38825–38878 (2022). https://doi.org/10.1007/s11356-022-19527-x

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  • DOI: https://doi.org/10.1007/s11356-022-19527-x

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