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Table 4 Cost analysis of different solar stills
| S. no. | References | Type of still | Productivity | Water production cost per liter |
|---|---|---|---|---|
| 1. | Samee et al. (2007) | Single slope single basin solar still | 1.7 l/day/0.54 m2 | 0.196 $/l |
| 2. | Kabeel (2009) | Concave wick basin pyramidal-shaped solar still | 4.0 l/m2/day | 0.065 $/l |
| 3. | Wassouf et al. (2011) | Pyramidal and triangular prism-shaped solar still | Average 1.8 l/m2/day | 0.046 and 0.063 $/l for pyramidal and triangular prism-shaped solar still |
| 4. | Rajamanickam and Ragupathy (2012) | Double slope solar still | 3.07 l/m2/day | 0.217 $/l |
| 5. | Arunkumar et al. (2012) | Hemispherical solar still | 4.2 l/m2/day | 0.017 $/l |
| 6. | Ahsan et al. (2014) | Triangular solar still | 1.6 l/m2/day | 0.072 $/l |
| 7. | Rajaseenivasan and Murugavel (2013) | Single and double basin double slope solar still | 4.75 and 2.56 l/m2/day for double basin and single basin still | 0.088 and 0.11 $/l for double basin and single basin still |
| 8. | Arunkumar et al. (2013b) | Compound parabolic concentrator concentric tubular solar still with water cooling | 2.5 l/m2/day | 0.015 $/l |
| 9. | Suneesh et al. (2014) | Cotton gauge top cover cooling V-type solar still | 4.3 l/m2/day | 0.170 $/l |
| 10. | Velmurugan et al. (2008) | Fin type solar still | 2.77 l/m2/day | 0.192 $/l |
| 11. | Dev et al. (2011) | Inverted absorber solar still | Average 4.0 l/m2/day | 0.11 $/l |
| 12. | Somwanshi and Tiwari (2014) | Single basin, water cooled cover solar still | Average 2.17 l/m2/day | 0.06 $/l |
| 13. | Elango et al. (2015) | Single basin single slope solar still with nanofluids | 3.8 l/m2/day | 0.095 $/l |
| 14. | Omara et al. (2014) | Stepped solar still with reflectors | Average 6.0 l/m2/day | 0.088 $/l |
| 15. | El-Algouz (2014) | Stepped solar still with water circulation | 5.23 l/m2/day | 0.19 $/l |
