Environment, Development and Sustainability

, Volume 18, Issue 4, pp 1151–1165 | Cite as

Solar-driven technology for freshwater production from atmospheric air by using the composite desiccant material “CaCl2/floral foam”



In this communication, experiments have been performed to check the capability of the newly formed composite desiccant material (CaCl2/floral) for the extraction of freshwater from atmospheric air. Three numbers of solar glass desiccant box type system (SGDBS) with a captured area of 0.36 m2 each, have been used. The design parameters for the water production are height of glass from desiccant bed at 0.22 m, inclination in angle as 30°, the effective thickness of glass as 3 mm and number of glazing as single. The maximum yield by the new composite desiccant material is 0.35 ml/cm3/day. The efficiency of the system SGDBS with 37 % concentration of CaCl2 is 76.44 %.


Solar glass desiccant box type system (SGDBS) CaCl2 Floral foam Water 

List of symbols


Capital recovery factor


Adsorption rate (kg/h)


Latent heat of water at average bed temperature (J/kg)


Mass of solution (kg)


Mass of salt (kg)


Mass of water (kg)


Weight of desiccant on wet basis (kg)


Number of useful years


Initial investment


Annual rate of interest


Salvage value


Sinking fund factor


Moisture content in desiccant (kgwater vapor/kgdesiccant)


Concentration of solution


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Copyright information

© Springer Science+Business Media Dordrecht 2015

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringNational Institute of TechnologyKurukshetraIndia

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