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Experimental Validation of the Thermal Processes Modeling in a Solar Still

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  • Ewelina Radomska

    (Department of Thermal and Fluid Flow Machines, Faculty of Energy and Fuels, AGH University of Science and Technology, Mickiewicza 30 St., 30-059 Krakow, Poland)

  • Lukasz Mika

    (Department of Thermal and Fluid Flow Machines, Faculty of Energy and Fuels, AGH University of Science and Technology, Mickiewicza 30 St., 30-059 Krakow, Poland)

  • Karol Sztekler

    (Department of Thermal and Fluid Flow Machines, Faculty of Energy and Fuels, AGH University of Science and Technology, Mickiewicza 30 St., 30-059 Krakow, Poland)

  • Wojciech Kalawa

    (Department of Thermal and Fluid Flow Machines, Faculty of Energy and Fuels, AGH University of Science and Technology, Mickiewicza 30 St., 30-059 Krakow, Poland)

Abstract

Passive solar distillation is cheap and energy-efficient technology but its main disadvantage is low productivity. Thus, there are many attempts to improve solar stills’ productivity, and one of them is changing the mass of the water. This paper presents the results of validation of the thermal processes modeling in a solar still (SS). In order to validate the model, the experimental studies were conducted in a laboratory to ensure uniform climatic conditions. The studies were carried out for 10 kg, 15 kg, and 20 kg of water under three different solar irradiance conditions. The results show that 10 kg and 20 kg of water ensure the highest and the lowest daily productivity, respectively, independently of solar irradiance. When the water mass is 10 kg, the solar still’s productivity is 800 mL/m 2 /day, 3732 mL/m 2 /day, and 9392 mL/m 2 /day for low, medium, and high solar irradiance, respectively. Additionally, it is found that reducing the water mass from 20 kg to 10 kg can improve solar still’s productivity by a maximum value of 21.6%, which is obtained for low solar irradiance. The proposed mathematical model allows predicting the performance of the SS. The results of the theoretical calculations are in good agreement with the results of the experiments. The minimum and maximum deviation between the actual and theoretical productivity of the SS is 1.1% and 8.3%, respectively.

Suggested Citation

  • Ewelina Radomska & Lukasz Mika & Karol Sztekler & Wojciech Kalawa, 2021. "Experimental Validation of the Thermal Processes Modeling in a Solar Still," Energies, MDPI, vol. 14(8), pages 1-22, April.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:8:p:2321-:d:539611
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    References listed on IDEAS

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    1. Kalidasa Murugavel, K. & Srithar, K., 2011. "Performance study on basin type double slope solar still with different wick materials and minimum mass of water," Renewable Energy, Elsevier, vol. 36(2), pages 612-620.
    2. Macmanus Chinenye Ndukwu & Lyes Bennamoun & Merlin Simo-Tagne, 2021. "Reviewing the Exergy Analysis of Solar Thermal Systems Integrated with Phase Change Materials," Energies, MDPI, vol. 14(3), pages 1-26, January.
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    6. Arunkumar, T. & Raj, Kaiwalya & Dsilva Winfred Rufuss, D. & Denkenberger, David & Tingting, Guo & Xuan, Li & Velraj, R., 2019. "A review of efficient high productivity solar stills," Renewable and Sustainable Energy Reviews, Elsevier, vol. 101(C), pages 197-220.
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    Cited by:

    1. Ewelina Radomska & Łukasz Mika & Karol Sztekler & Wojciech Kalawa & Łukasz Lis & Kinga Pielichowska & Magdalena Szumera & Paweł Rutkowski, 2023. "Experimental and Theoretical Investigation of Single-Slope Passive Solar Still with Phase-Change Materials," Energies, MDPI, vol. 16(3), pages 1-29, January.
    2. Mohamed Benghanem & Adel Mellit & Mohammed Emad & Abdulaziz Aljohani, 2021. "Monitoring of Solar Still Desalination System Using the Internet of Things Technique," Energies, MDPI, vol. 14(21), pages 1-12, October.

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