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Solar still utilizes solar radiation to convert brackish or saline water into potable water. In today’s era, the lower performance of solar still led to various modifications in its design or enhancing its productivity by using materials that can accumulate energy for a long time. In the present investigation, four different cases, namely, the conventional solar still, the DSS-1 developed still with eutectic PCM, the DSS-2 developed still with eutectic PCM and wick material, and the DSS-3 developed still with nanoembedded PCM, were compared under the same outdoor conditions. The findings reveal that the total yields for CSS, DSS-1, DSS-2, and DSS-3 are, respectively, around 1.79, 2.34, 3.36, and 4.18 kg/m2. The combined effect of PCM and nanoparticles exhibits an average efficiency of 49% (DSS-3), which is higher than CSS (22.21%), DSS-1 (30.42%), and DSS-2 (41%), respectively. The cost estimated by economic analysis for CSS, DSS-1, DSS-2, and DSS-3 was 1.11, 1.3, 1.24, and 1.19 (Rs/l). The integration of PCM-SWF in conventional still increases the cost of water by 12% with a tremendous increase in fresh water yield of 92%, whereas the integration of nano-enhanced PCM increases the cost of water by 7.2% with a tremendous increase in fresh water yield of 132%.

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Performance Improvement and Economic Analysis of Double Slope Solar Still with Nanoenhanced Eutectic Phase Change Material and Wick Material

  • 会议论文

  • 发表日期：

    2025年

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  • Rahul Agrawal,
  • Manish Joshi,
  • Poonam Kumar Agade,
  • Deo Kumar Singh

摘要

Solar still utilizes solar radiation to convert brackish or saline water into potable water. In today’s era, the lower performance of solar still led to various modifications in its design or enhancing its productivity by using materials that can accumulate energy for a long time. In the present investigation, four different cases, namely, the conventional solar still, the DSS-1 developed still with eutectic PCM, the DSS-2 developed still with eutectic PCM and wick material, and the DSS-3 developed still with nanoembedded PCM, were compared under the same outdoor conditions. The findings reveal that the total yields for CSS, DSS-1, DSS-2, and DSS-3 are, respectively, around 1.79, 2.34, 3.36, and 4.18 kg/m2. The combined effect of PCM and nanoparticles exhibits an average efficiency of 49% (DSS-3), which is higher than CSS (22.21%), DSS-1 (30.42%), and DSS-2 (41%), respectively. The cost estimated by economic analysis for CSS, DSS-1, DSS-2, and DSS-3 was 1.11, 1.3, 1.24, and 1.19 (Rs/l). The integration of PCM-SWF in conventional still increases the cost of water by 12% with a tremendous increase in fresh water yield of 92%, whereas the integration of nano-enhanced PCM increases the cost of water by 7.2% with a tremendous increase in fresh water yield of 132%.