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article · Desalination and Water Treatment

Optimization and thermo-economic assessment of hemispherical solar distillers with a flat and concave basin: Experimental approaches

In plain language

This research addresses the global challenge of clean drinking water scarcity by optimising solar stills, a renewable energy-based desalination method. It compared two hemispherical solar distillers: one with a flat basin and another with a concave basin. Both designs were tested under identical climatic conditions in El Oued, Algeria. The study found that the concave basin design significantly outperformed the flat basin. The hemispherical solar distiller with a concave basin achieved a daily productivity of 5.50 kg/m³, representing a 23.59% improvement. Its daily thermal efficiency also increased from 37.69% to 46.43%, an improvement of 23.19% compared to the flat basin design. This indicates that basin design is a crucial factor in enhancing solar distiller performance.

Key takeaways

  • Lack of clean drinking water is a significant global challenge.
  • Solar stills offer an efficient, renewable energy solution for water desalination.
  • A comparative study assessed hemispherical solar distillers with flat and concave basins.
  • The concave basin design demonstrated superior performance in daily productivity and thermal efficiency.
  • The concave basin distiller improved daily productivity by 23.59% and thermal efficiency by 23.19%.

Why it matters

This research is important because it identifies an improved design for solar distillers, which are vital for producing clean drinking water in regions facing scarcity. Enhancing the efficiency of these devices can make clean water more accessible and affordable, supporting public health and sustainable development.

Commercialisation angle

This applied research offers an optimised design for solar distillers, a technology used for water purification. The improved concave basin design could be integrated into new or existing solar still products, benefiting communities and organisations in need of decentralised clean water solutions. This work is at the stage of design optimisation and experimental testing, suggesting it is moving towards practical application.

AI-generated from the published abstract. Always read the original work before citing.

Abstract

One of the challenging issues facing the world today is a lack of clean drinking water. The straightforward and efficient solution to this problem is the use of solar stills, which is one of the solar desalination methods that use renewable energy. The design selection of the solar stills is one of the strategies for distillate optimization, which aims to increase the productivity of solar distillates. To achieve this idea, this study deals with a comparative performance analysis of two solar stills with the same hemispherical cover, one contains a flat basin and the second contains a concave basin. Two hemispherical solar distillers, one of which has a flat basin (HSD-FB) and the other has a concave basin (HSD-CB) were designed and tested in El Oued, Algeria, under the same climatic conditions to get the better design of basin solar distillers. The results showed that the concave basin represents the best design that achieved the highest performance of hemispherical solar distillers. The daily productivity of the hemispherical solar distiller with a concave basin (HSD-CB) reached 5.50 kg/m3 with an improvement of 23.59% compared to HSD-FB. Also, with the utilization of the concave basin (HSD-FB), the daily thermal efficiency increased from 37.69% to 46.43% with an improvement of 23.19% compared to HSD-FB.

Research topics

  • Solar Thermal and Photovoltaic Systems
  • Solar-Powered Water Purification Methods
  • Photovoltaic System Optimization Techniques

Read the original research

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DOI: 10.1016/j.dwt.2024.100223

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