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| Reference | Model | Results |
|
| Monowe et al. [7] | A portable thermal-electrical solar still with an external mirror booster | The efficiency of still was 77% by using preheated saline water |
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| Arunkumar et al. [8] | A hemispherical type solar still | The efficiency was increased from 34% to 42% with the increased daily distillate |
|
| Y. Taamneh and M. M. Taamneh [9] | A pyramid shaped solar still | The daily productivity was increased for 25% on forced convection |
|
| Singh et al. [10] | A solar still integrated with evacuated tube collector | The energy and exergy efficiencies were obtained as 33% and 2.5% with a daily yield of 3.8 kg/m2 |
|
| Arunkumar et al. [11] | A concentrator coupled hemispherical basin solar with phase change media | The daily productivity was increased by 26% by using PCM |
|
| Ayoub and Malaeb [12] | Solar still integrated with a slowly rotating hollow cylinder | The daily yield was increased by 200–300% by this modification |
|
| Omara et al. [13] | A stepped solar still with internal and external reflectors | Internal and external reflectors have been found to increase the daily productivity of the model by about 125% over conventional still |
|
| Estahbanati et al. [14] | A multistage active solar still | Results show that a 5-stage system can produce 23.8 kg of freshwater in noncontinuous mode, while a 6 -stage one can increase this production for a minor amount |
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| Al-Nimr and Dahdolan [15] | Concentrated tube type solar still with porous evaporator | The still efficiency was found 21.3% with a distillate 1.89 kg/day |
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| Appadurai and Velmurugan [16] | Fin type solar still integrated with a fin type small solar pond | The productivity was increased up to 50% at this configuration |
|
| Huang et al. [17] | Solar still with spiral-shape multiple-effect diffusion unit coupled with a vacuum tube solar collector | Highest daily pure H2O production was 40.6 kg and the distillation efficiency was around 3.5% |
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