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Enhancement of distillate output of double basin solar still with vacuum tubes

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Abstract

The latent heat of condensation is lost to the atmosphere; hence it is not utilized to increase distillate output of single basin solar stills. This difficulty was overcome by attaching an additional basin to the main basin. The performance of the double basin solar still was also increased by attaching vacuum tubes to the lower basin; hence the lower basin possessed a higher temperature throughout the day. The latent heat of condensation of the bottom basin was also utilized to increase distillate. But the distillate output of the top basin was even lower compared with that of the bottom basin. This paper proposed a novel approach to increase the distillate output of the double basin solar still attached with vacuum tubes by introducing different sensible energy storage materials like pebbles, black granite gravel and calcium stones to increase the basin area. Experiments were conducted in climate conditions of Mehsana (23.6000° N, 72.4000° E) Gujarat from April to September 2013 with a constant water depth of 2 cm in the top basin with and without the use of basin materials. The results showed that the distillate output of basin material with calcium stones is greater (74%) compared with that of black granite gravel and pebbles. The integration of vacuum tubes with solar still greatly increases the distillate output of the solar still by providing hot water at the lower basin.

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Authors and Affiliations

  1. Mechanical Engineering Department, KSV University, Gandhinagar, 382023, India

    Hitesh N. Panchal

  2. Mechanical Engineering Department, Sal Institute of Engineering & Technology, Ahmadabad, 380060, India

    P. K. Shah

Authors
  1. Hitesh N. Panchal
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  2. P. K. Shah
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Correspondence to Hitesh N. Panchal.

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Panchal, H.N., Shah, P.K. Enhancement of distillate output of double basin solar still with vacuum tubes. Front. Energy 8, 101–109 (2014). https://doi.org/10.1007/s11708-014-0299-5

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  • DOI: https://doi.org/10.1007/s11708-014-0299-5

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