Why is silica gel important?

Notably, silica gel plays a vital role in water sorption from the atmospheric air as it is affordable and has a low regenerative temperature (Wang et al., 2009); however, the sorption ability of silica gel at ambient temperature is deficient and attains 40% when it is used individually in AWH technologies.

How efficient is a cylindrical solar still with Super moisture absorbent gel (SMAG)?

Besides, the cylindrical solar still with super moisture absorbent gel (SMAG) outperforms different AWH counterparts in terms of thermal efficiency, which attained a substantial system efficiency of 81%. Portable systems are considered one of the prospective systems for atmospheric water harvesting.

What is the difference between adsorption desalination and silica gel/CaCl 2?

The combined configuration with heat recovery (the fourth mode) using silica gel/CaCl 2 gives a relatively high freshwater production (69 m 3 /ton.day in June) compared with the basic adsorption desalination system using raw silica gel (7.1 m 3 /ton.day in June).

Does silica gel produce cooled water?

Ng et al. studied theoretically and experimentally an ADS with low thermal energy from solar collectors utilizing silica gel as AM. The findings reveal that the AD cycle can produce cooled water at temperatures ranging from 7 to 10 °C, with a specific cooling capacity (SCC) range of 25 to 35 TR/ton of silica gel (SG).

What is the cooling effect of CaCl 2 vs silica gel?

Silica gel/CaCl 2 in the first mode presented the highest cooling effect (555 W/kg) in June compared with silica gel in the primary system (197 W/kg).

What is the water adsorption rate of silica gel?

The water adsorption rate of pure silica gel is compared with silica gel/CaCl 2 (Zhu et al., 2006). This comparison revealed that the uptake increased from 0.15 g/g by using pure silica gel to 0.73 g/g using silica gel/CaCl 2 at 30 °C.