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<p>A novel study presents an innovative method to increase the performance of single-slope solar stills (SSSS) by optimizing water depth and integrating thermoelectric cooling. The experiment showed a 24.44% enhancement in water yield when the water depth was decreased from 3 to 1&#xa0;cm. Further improvements were observed with the integration of thermoelectric cooling at 1&#xa0;cm depth, resulting in a 37.91% increase in water yield compared to the non-cooled system and a 71.61% performance boost over the single-slope solar still (SSSS) at 3&#xa0;cm depth. The SSSS operating at 1&#xa0;cm depth is termed CSS, the system at 3&#xa0;cm depth is referred to as CSS’ , and the SSSS operating at 1&#xa0;cm with thermoelectric cooling is called MSS (modified solar still). The systems were evaluated based on energy, exergy, economic, and environmental factors. The daily energy efficiency of the modified solar still (MSS), CSS, and CSS’ was 26.96%, 19.50%, and 14.48%, respectively. Corresponding daily exergy efficiencies were 1.13%, 1.00%, and 0.65%. The payback period for MSS was 13.47% shorter than CSS and 31.25% shorter than CSS’ at a selling price of Rs 8 with a 6% interest rate. Carbon credit earnings were significantly higher for MSS, reaching Rs 8370.27 compared to Rs 5109.76 for CSS and Rs 4126.74 for CSS’ when the system lifespan was extended from 15 to 25&#xa0;years.</p>

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Performance enhancement of a single-slope solar still using optimized water depth and thermoelectric cooling: 4E analysis

  • 期刊论文

  • 发表日期：

    2025年11月3日

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  • Niraj Kumar,
  • Arun Kumar

摘要

A novel study presents an innovative method to increase the performance of single-slope solar stills (SSSS) by optimizing water depth and integrating thermoelectric cooling. The experiment showed a 24.44% enhancement in water yield when the water depth was decreased from 3 to 1 cm. Further improvements were observed with the integration of thermoelectric cooling at 1 cm depth, resulting in a 37.91% increase in water yield compared to the non-cooled system and a 71.61% performance boost over the single-slope solar still (SSSS) at 3 cm depth. The SSSS operating at 1 cm depth is termed CSS, the system at 3 cm depth is referred to as CSS’ , and the SSSS operating at 1 cm with thermoelectric cooling is called MSS (modified solar still). The systems were evaluated based on energy, exergy, economic, and environmental factors. The daily energy efficiency of the modified solar still (MSS), CSS, and CSS’ was 26.96%, 19.50%, and 14.48%, respectively. Corresponding daily exergy efficiencies were 1.13%, 1.00%, and 0.65%. The payback period for MSS was 13.47% shorter than CSS and 31.25% shorter than CSS’ at a selling price of Rs 8 with a 6% interest rate. Carbon credit earnings were significantly higher for MSS, reaching Rs 8370.27 compared to Rs 5109.76 for CSS and Rs 4126.74 for CSS’ when the system lifespan was extended from 15 to 25 years.