From: A review of optimum parameter values of a passive solar still and a design for southern Bangladesh
Parameters | Significance in output | Optimum value | Ref. |
---|---|---|---|
Water depth | The lower the water depth, the higher the yield | As lower as possible | Garg and Mann (1976), Phadatare and Verma (2007), Tiwari and Tiwari (2007) |
 |  | 0.04 m or lower |  |
Coloring of water | If convection between the basin and surroundings is reduced, then utilization of dye has negligible effect on productivity | No dye is used | |
Water mass flow rate | Productivity is inversely proportional to the water mass flow rate | Lower mass flow rate of water is recommended | Mahdi et al. (2011) |
Salt concentration | With increased salinity, productivity will be decreased | Salt concentration can be kept minimum by removing the brine after everyday production at night | |
Phase change material (PCM) | Productivity can be increased up to 85.3% with the use of PCM | PCMs should not be used as there is no standard PCM and the technology is very new which should be researched properly first | |
Surfactant additives | Adding surfactant has a very less effect and can be avoided | No surfactants is used |