International Scientific Journal

Thermal Science - Online First

online first only

Experimental investigation and comparison of desalination using conventional solar still, stepped-cup solar still with and without biomass

Desalination of water has become one of the vital areas of research because of the increasing demand for fresh water. The usage of solar stills is one of the conventional methods for the process of desalination. In this paper, a novel design variation is given to the conventional solar still to increase the productivity of desalination. The plain basin plate of the conventional still is replaced with steps with cup shaped trays. Experiment has been done to measure the hourly desalinate productivity of both conventional solar still and the stepped-cup solar still in the month of May in Tamilnadu, India. Further, a biomass boiler is connected to the stepped-cup solar still to increase the heat inside the still. Productivity of the stepped-cup solar still with the biomass boiler setup has been measured and compared with the productivity of conventional solar still. Results have shown that the proposed stepped-cup solar still design has increased the productivity by 12% compared to the conventional still. Also, the productivity of the stepped-cup solar still has shown an enormous 70% increase on the addition of the biomass when compared to the conventional solar still.
PAPER REVISED: 2019-05-11
PAPER ACCEPTED: 2019-06-01
  1. Moustafa, S.M.A et al., Direct use of solar energy for water desalination, Solar Energy 22 (1979), pp. 141-148.
  2. Tiris C, et al., Experimental studies on a solar still coupled with a flat-plate collector and a single basin still, Energy Conversion and Management, 39 (1998), pp. 853-861.
  3. Zurigat, Y.H, et al., Modeling and performance analysis of a regenerative solar desalination unit, Applied Thermal Engineering, 24 (2004), pp. 1061-1072.
  4. Al-Hayek Imad, et al., The effect of using different designs of solar stills on water distillation, Desalination, 169 (2004), pp. 121-127.
  5. Saravankumar.P.T, et al., Ecological effect of corn oil biofuel with Si, Energy Sources, Part A: Recovery, Utilization, and Environmental Effects (2019).
  6. Velmurugan V, et al., Experimental studies on solar stills integrated with a mini solar pond, Third BSME-ASME international conference on thermal engineering, Dhaka, Bangladesh; 2006.
  7. Velmurugan V, et al., Solar stills integrated with a mini solar pond - analytical simulation and experimental validation, Desalination, 216 (2007), pp. 232-241.
  8. Velmurugan V, et al., Prospects and scopes of solar pond - a detailedreview, Renewable and Sustainable Energy Review, 12 (2008), pp. 2253-2263.
  9. Velmurugan V, et al., Productivity enhancement of stepped solar still - performance analysis. Thermal Science, 12 (2008), pp. 153-163.
  10. El-Zahaby, A.M., et al., Augmentation of solar still performance using flashevaporation, Desalination, 257 (2010), pp. 58-65.
  11. Senthil Rajan.A, et al., Multi basin desalination using biomass heat source and using analytical validation using RSM, Energy Conversion and Management, 87 (2014), pp. 359-366.
  12. Kalidasa Murugavel K, et al., Performance study on basin type double slope solar still with different wick materials and minimum mass of water, Renewable Energy 36 (2011), pp. 612-620.
  13. Kalidasa Murugavel, K., et al., Single slope still with minimum basin depth and energy storing materials, Applied Energy 87 (2010), pp. 514-523.
  14. Dhandayuthabani.M., et al., Investigation of latent heat storage system using graphite microparticle enhancement, J. of Thermal Analysis and Calorimetry,,2019.
  15. Velmurugan V, et al., Productivity enhancement of stepped solar still - performance analysis, Thermal Science, 12 (2008), pp. 53-63.
  16. Velmurugan, V., et al., Integrated performance of stepped and single basin solar stills with mini solar pond, Desalination, 249 (2009), pp. 902-909.
  17. Govindasamy.P, et al., Experimental Investigation of the Effect of Compression Ratio in a Direct Injection Diesel Engine Fueled with Spirulina Algae Biodiesel, J. of Applied Fluid Mechanics,11(2019), Special Issue, pp. 107-114.
  18. Pradeep Mohan Kumar.K., et al., Computational Analysis and Optimization of Spiral Plate Heat Exchanger, J. of Applied Fluid Mechanics, Volume 11 (2018), Special Issue,, 121-128.
  19. Avudaiappan.T, et al., Potential Flow Simulation through Lagrangian Interpolation Meshless Method Coding, J. of Applied Fluid Mechanics, 11(2018),, 129 -134.