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Augmentation of freshwater productivity in a single-slope solar still using ball marbles

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Abstract

In the current research, the energy and economic performance in single-slope solar still using ball marbles (BMSS) has been investigated and compared the results with conventional solar still (CSS) under the similar weather conditions of Karaikal (10.92° N, 79.83° E), India, during October 2020. The experiments have been conducted on both sunny and cloudy day to evaluate the performance of solar still. The BMSS has increased the evaporation rate and productivity when compared to CSS due to the sensible heat energy stored by the ball marbles in the absorber basin. The potable water yield of the BMSS is improved by 21.23% and 22.86%, respectively, during sunny and cloudy days. The maximum cumulative productivity obtained in the BMSS is 2950 mL/m2.day and 2150 mL/m2.day, respectively, on sunny and cloudy days. In economic analysis, the payback period (PBP) of the BMSS is 5.7 months, whereas the PBP of the CSS is 6.5 months, respectively. Furthermore, the cost per litre (CPL) potable water produced by BMSS is 8% lower than the CPL of CSS.

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Data Availability

The datasets used and/or analysed during the current study are available from the corresponding author on reasonable request.

Abbreviations

AC:

annual cost

AMC:

annual maintenance cost

ASV:

annual salvage value

BMSS:

ball marbles solar still

CC:

capital cost

CPL:

cost per litre

CRF:

capital recovery factor

CSS:

conventional solar still

FAC:

fixed annual cost

PBP:

payback period

S:

salvage value

SFF:

sinking fund factor

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Units

mL millilitre

mm millimetre

cmcentimetre

m metre

L litre

°C degree Celsius

Other abbreviations

p.y potable water yield

λ latent heat of vaporization of water

Ab area of the absorber basin

G.R global solar radiation

∆t duration of the cumulative readings in sec

uη uncertainty of the efficiency

udw uncertainty in instantaneous productivity

I(t) radiation at a particular time

Wr total uncertainty

R function

w,x independent variables

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Authors and Affiliations

Authors

Contributions

Subbarama Kousik Suraparaju—conceptualization, formal analysis, investigation, data curation, writing (original draft).

Ramasamy Dhivagar—conceptualization, data curation, methodology, writing (original draft).

Sendhil Kumar Natarajan—conceptualization, validation, resources, writing (review and editing), supervision, project administration.

Corresponding author

Correspondence to Sendhil Kumar Natarajan.

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Conflict of interest

The authors declare no competing interests.

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Responsible Editor: Philippe Garrigues

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Suraparaju, S.K., Ramasamy, D. & Natarajan, S.K. Augmentation of freshwater productivity in a single-slope solar still using ball marbles. Environ Sci Pollut Res 28, 65974–65986 (2021). https://doi.org/10.1007/s11356-021-15117-5

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  • DOI: https://doi.org/10.1007/s11356-021-15117-5

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