Desalination of brackish water using dual acting solar still

  • Hamza Bilal
  • Abdul Ghafoor
  • Anjum Munir
Keywords: Flat plate collector, evaporation chamber, distillate, solar still.


Desalination of the brackish water is a very suitable approach to augment the exponentially increasing fresh water demands due to uncontrolled population growth in the developing countries. Keeping in view the local needs of small families residing in the remote areas of the country and having no access to fresh water availability, this research has been carried out for the development of locally fabricated dual acting solar still having lower initial cost for desalination purpose. The system consists of a flat plate collector, an evaporation chamber equipped with heat exchanger made of 5 mm copper tube, 60 Wp solar PV panel and water circulation mechanism. The result shows that the fresh water production was found to be 3.8 l/m2 in 8 hours a day. The drinking quality water tests have also been performed and compared with International standards. The result shows that EC, pH, TDS, Na1+, Ca2+ and Mg was found to be 0.15 dsm-1, 6.1, 105 ppm, 0.47 mg/l, 0.65 mg/l and 0.54 mg/l respectively and at par with International standards. The result showed that the dual acting solar still can be used for desalination purposes under favorable climatic condition and high amount of solar insolation in the region.


Tiwari, A. K. and Tiwari, G.N. 2005. Effect of the condensing cover's slope on internal heat and mass transfer in distillation: an indoor simulation. Desalination. 180, 73-88.

Tiwari, A. K. and Tiwari, G.N. 2008. Effect of cover inclination and water depth on performance of solar still Indian climatic conditions. J. Solar Energy Eng. 130 (2), 4502-4504.

Chafidz, A., Al-Zahrani, S., Al-Otaibi, M. N., Hoong, C. F., Lai, T. F. and Prabu, M. 2014. Portable and integrated solar-driven desalination system using membrane distillation for arid remote areas in Saudi Arabia. Desalination. 345, 36-49.

Farid, M. and Al-Hajaj, A.W. 1998. Solar desalination with a humidification-dehumidification cycle: performance of the unit. Desalination. 120(3), 273-280.

Tiwari, G.N., Dimri, V. and Chel, A. 2009. Parametric study of an active and passive solar distillation system: energy and exergy analysis. Desalination. 242, 01-18.

Kalogirou, S. 2003. The potential of solar industrial process heat applications. Applied Energy. 76, 337-361.

Liu, Z.H., Hu, R. and Chen, X. 2014. A novel integrated solar desalination system with multi-stage evaporation/heat recovery processes. Renewable Energy. 64, 26-33.

Ghosal, M. K., Tiwari, G. N. and Srivastava, N. S. L. 2002. Thermal modeling of a controlled environment greenhouse cum solar distillation for composite and warm humid climates. Desalination. 151, 293-308.

Maroo, S. and Goswami, D. 2009. Theoretical analysis of single-stage and two-stage solar driven flash distillation system based on passive vacuum generation. Desalination. 249, 635-646.

Qiblawey, H. M. and Banat, F. 2008. Solar thermal desalination technologies. Desalination. 220, 633-644.

Qtaishat, M. R. and Banat, F. 2013. Desalination by solar powered membrane distillation systems. Desalination. 308, 186-197.

Dev, R. and Tiwari, G. N. 2010. Characteristic equation of a hybrid (PV-T) active solar still. Desalination, 254, 126-137.

Kalogirou, S.A. 2005. Seawater desalination using renewable energy sources. Prog. Energy Combust. Sci. 31, 242-281.

Kalogirous, S. A. 2004. Solar thermal collectors and applications. Prog. Energy Combust. Sci. 30, 231-295.

Dimria, V., Sarkar, B., Singh, U. and Tiwari, G.N. 2008. Effect of condensing cover material on yield of an active solar still: an experimental validation. Desalination. 227, 178-189.

Wang, J.H., Gao, N., Deng, Y. and Li, Y. 2012. Solar power-driven humidification-

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