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Improving the Single-Slope Solar Still Performance Using Solar Air Heater with Phase Change Materials

Author

Listed:
  • Sujit Kumar

    (Department of Mechanical Engineering, Birla Institute of Technology, Mesra 835215, Jharkhand, India)

  • Om Prakash

    (Department of Mechanical Engineering, Birla Institute of Technology, Mesra 835215, Jharkhand, India)

Abstract

This communication discusses the energy, exergy, and economic feasibility of novel heat storage based on a single-slope solar still coupled with a solar air heater (SAH). The analysis was conducted on three different solar stills, i.e., a single-slope solar still (SSSS), single-slope solar still with latent heat storage, and a single-slope solar still with latent heat storage coupled with a solar air heater. The performance evaluation of all types of solar still has been compared to evaluate the best-performing solar still. Paraffin wax as a phase change material (PCM) has been used at the bottom of the solar still to provide proper thermal storage. The experiments were conducted on different depths, i.e., 3 cm, 6 cm, 9 cm, 12 cm, and 15 cm. The efficiency of a single-slope solar still with PCM and SAH was 65.58% higher than a conventional solar still. The average exergy efficiency of a single-slope solar still with latent heat storage coupled with a solar air heater is 83.19% higher than a traditional solar still. Additionally, the maximum hourly output was found to be 735 mL/m 2 h for the solar still customized with PCM and solar heater for a depth of 3 cm. This shows that the still (single-slope solar still with latent heat storage coupled with a solar air heater) has higher thermal performance than the other two solar stills. Therefore, the proposed solar still is very suitable for desalination.

Suggested Citation

  • Sujit Kumar & Om Prakash, 2022. "Improving the Single-Slope Solar Still Performance Using Solar Air Heater with Phase Change Materials," Energies, MDPI, vol. 15(21), pages 1-15, October.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:21:p:8013-:d:956030
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    References listed on IDEAS

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    2. Durkaieswaran, P. & Murugavel, K. Kalidasa, 2015. "Various special designs of single basin passive solar still – A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 49(C), pages 1048-1060.
    3. Hawlader, M. N. A. & Uddin, M. S. & Khin, Mya Mya, 2003. "Microencapsulated PCM thermal-energy storage system," Applied Energy, Elsevier, vol. 74(1-2), pages 195-202, January.
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    Cited by:

    1. Jesus Fernando Hinojosa & Saul Fernando Moreno & Victor Manuel Maytorena, 2023. "Low-Temperature Applications of Phase Change Materials for Energy Storage: A Descriptive Review," Energies, MDPI, vol. 16(7), pages 1-39, March.

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