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Theoretical and experimental studies of an ethanol basin solar still

Author

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  • Namprakai, P.
  • Hirunlabh, J.

Abstract

A transient-state mathematical model for an ethanol basin solar still based on Spalding's work was developed. Driving force B was defined based on the mass balance between the evaporating (S) and condensing (G) surfaces. Mass transfer conductance (g) was obtained from an indoor experiment. Then productivity could be calculated. In order to validate the model an ethanol basin solar still was tested under outdoor conditions. The model had RMSEs of 4% and 23% of the measured mean temperature and productivity. The mean productivity was 0.33kg/h when the mean solar radiation input was 1.95MJ/m2/h. The simulated distillate concentrations were 74, 59 and 24%v/v for ethanol solution concentrations of 50, 30 and 10%v/v. The monthly means of the simulated daily productivity and total daily solar radiation were linearly correlated.

Suggested Citation

  • Namprakai, P. & Hirunlabh, J., 2007. "Theoretical and experimental studies of an ethanol basin solar still," Energy, Elsevier, vol. 32(12), pages 2376-2384.
    • Handle: RePEc:eee:energy:v:32:y:2007:i:12:p:2376-2384
    DOI: 10.1016/j.energy.2007.08.002
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    References listed on IDEAS

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    1. Kiatsiriroat, T. & Bhattacharya, S.C. & Wibulswas, P., 1986. "Prediction of mass transfer rates in solar stills," Energy, Elsevier, vol. 11(9), pages 881-886.
    2. Namprakai, P. & Hirunlabh, J. & Kiatsiriroat, T., 1997. "Ethyl alcohol distillation in a basin solar still," Renewable Energy, Elsevier, vol. 11(2), pages 169-175.
    3. ElSherbiny, Samy M. & Fath, Hassan E.S., 1993. "Solar distillation under climatic conditions of Egypt," Renewable Energy, Elsevier, vol. 3(1), pages 61-65.
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    1. Panomwan Na Ayuthaya, Rattanapol & Namprakai, Pichai & Ampun, Wirut, 2013. "The thermal performance of an ethanol solar still with fin plate to increase productivity," Renewable Energy, Elsevier, vol. 54(C), pages 227-234.
    2. El-Sebaii, A.A. & Al-Ghamdi, A.A. & Al-Hazmi, F.S. & Faidah, Adel S., 2009. "Thermal performance of a single basin solar still with PCM as a storage medium," Applied Energy, Elsevier, vol. 86(7-8), pages 1187-1195, July.

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