Carbonized rice husk coated solar absorber for clean water generation from seawater with a solar still

Karen, Wong Min Jin; Wong, C Y; Wang, Zhipeng; Liew, Willey Yun Hsien; Melvin, Gan Jet Hong

doi:10.1080/09593330.2021.1970820

Cited by 6 publications

(2 citation statements)

References 30 publications

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“…The presence of salt (salinity) in the collected clean water was because of the evaporation process in the closed solar still. As the closed solar still was concentrated with the water vapor, the molecules regularly bumped onto the top surface of the bulk seawater and carbon-coated solar absorber, hence giving weak kinetic energy for the salt molecules to escape [17]. Besides, porous structure of melamine sponge and carbonized rice husk helps in filtering the salt molecules, therefore lower salinity level in TC and BC [18].…”

Section: Resultsmentioning

confidence: 99%

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Desalination of seawater using carbon-coated solar absorber in solar still

Karen

Wong

Melvin

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Desalination is a process of eliminating salt and other minerals from seawater which turns it to a safe usable water. This study showed the generation of clean water from seawater using carbon-coated solar absorber in two different solar still body colours which are transparent and black solar still, under direct solar exposure at approximately 1.2 kW/m2. The efficiency of carbon-coated solar absorber in the transparent and black solar still was computed, while the clean water collected was examined for its pH and salinity. Carbon-coated solar absorber in black solar still exhibit the highest efficiency at around 35.71%, where the pH and salinity of the collected clean water was substantially reduced to usable water at 6.55 and 62 ppm, respectively.

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Section: Resultsmentioning

confidence: 99%

“…Fabrication of solar stills and the experimental procedure was done based on reference [17] with some modification. Solar stills were constructed using 3 mm thick non-reflective transparent and black acrylic plastic, respectively.…”

Section: Methodsmentioning

confidence: 99%

Desalination of seawater using carbon-coated solar absorber in solar still

Karen

Wong

Melvin

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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An Antimicrobial, Environmental Protection, and High‐Efficiency Solar Steam Generator Based on Carbonized Sawdust

Wang,

Zhang,

Xie

et al. 2023

Energy Tech

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Different technologies of cold and heat storages are developed at Fraunhofer ISE. This paper provides an overview of ongoing research for sensible and latent thermal energy storages. Phase change emulsions are developed supported by molecular dynamic simulations. A narrow temperature range of the phase change is crucial for the applicability. By the simulations a nucleation additive is identified that reduces supercooling by up to 9 K. The long‐term stability of phase change material is investigated by degradation experiments. Thermal cycling and ageing of materials at elevated temperature are applied. The change of melting enthalpy and characteristic temperatures are evaluated. Among erythritol, adipic acid and myristic acid, the smallest degradation was observed for the latter. For sensible storages, the reduction of thermal oil by low‐cost filler materials and their compatibility is investigated at elevated temperature. It can be concluded that the materials are compatible up to 320 °C. At the component level, different macroencapsulations and immersed heat exchanger are tested for phase change materials. The investigated configurations achieve similar values of thermal power during (dis‐)charge. Compared to water as storage medium, the capacity increases by a factor of 2.2 and 4.1 for the macroencapsulation and the immersed heat exchanger, respectively.This article is protected by copyright. All rights reserved.

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Carbonized sawdust based solar absorber in a solar still for seawater desalination

Karen,

Stephen,

Wang

et al. 2024

Env Prog and Sustain Energy

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Current industrial technologies for seawater desalination involve high cost and energy consumption, that is, distillation and reverse osmosis, where these technologies are difficult to implement especially in developing countries. A cost‐effective, environmental‐friendly, and sustainable technology is essential in providing alternative methods for generation of clean water. Solar vapor generation is one of the potential green technologies in generating clean water, where the production and collection of clean water is made possible by using a solar absorber in a solar still. The practicality and performance of the carbonized sawdust based solar absorber in a solar still for the seawater desalination towards clean water generation was conducted outdoors with gradual enhancement on the solar still setup. The enhanced solar still with reflective surface and external thermal insulator improved the solar absorber performance, in contrast to the evaporation of the bulk seawater only and using solar absorber in the solar still without any enhancement. The average efficiency and evaporation rate of the solar absorber in the enhanced solar still was recorded at 61.5% and 0.98 kg m−2 h−1, respectively. The pH (7.52) and salinity (10 ppm) of the collected clean water meets the standard of safe water by the World Health Organization.

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Carbonized rice husk coated solar absorber for clean water generation from seawater with a solar still

Cited by 6 publications

References 30 publications

Desalination of seawater using carbon-coated solar absorber in solar still

Desalination of seawater using carbon-coated solar absorber in solar still

An Antimicrobial, Environmental Protection, and High‐Efficiency Solar Steam Generator Based on Carbonized Sawdust

Carbonized sawdust based solar absorber in a solar still for seawater desalination

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