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Experimental investigation of the impact of water depth, inlet water temperature, and fins on the productivity of a Pyramid Solar Still
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Abstract: This experimental study aimed to investigate the impact of water depth, inlet water temperature, and fins on the productivity of a pyramid solar still in producing distilled water. The experiment was conducted in three parts, where the first part explored the variation in water depth from 1 cm to 5 cm, the second part evaluated the effect of increasing inlet water temperature from 30°C to 50°C, and the third part added fins at the bottom of the still at a specific inlet water depth. Results showed that basin depth had a significant impact on the still’s production, with a maximum variation of 40.6% observed when the water level was changed from 1 cm to 5 cm. The daily freshwater production from the pyramid solar still ranged from 3.41 kg/m2 for a water depth of 1 cm to 2.02 kg/m2 for a depth of 5 cm. Adding fins at the bottom of the pyramid solar still led to a 7.5% increase in productivity, while adjusting the inlet water temperature from 30°C to 40°C and 50°C resulted in a 15.3% and 21.2% increase, respectively. These findings highlighted the essential factors that can influence the productivity of pyramid solar stills and can be valuable in designing and operating efficient water desalination and purification technologies.
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Key words:
- Pyramid solar still /
- Basin depth /
- Freshwater /
- Efficiency /
- Desalination
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Figure 2. (a) Schematic diagram of the pyramid solar still with fins in the basin; (b) Detailed dimension of the fins
Figure 5. Variation of basin water temperature during experimental hours for different water depths
Figure 6. Variation of hourly freshwater productivity for pyramid solar still with different water depths
Figure 7. Total amount of fresh water produced by the pyramid solar still with different water depths
Figure 8. The effect of changing inlet water temperature from 30°C to 50°C on solar still productivity
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