Abstract
Harvesting dew can be used as a renewable complementary source of water both for drinking and agriculture in specific arid or semi-arid water-stressed areas. Condensation of water vapor by nighttime radiative cooling is the phenomenon that can be explained the dew formation on plants or surfaces. In this paper, we propose the lawsonite mineral, as a potential radiative cooling material, for exploiting this natural phenomenon. Furthermore, a computer model that includes meteorological parameters, obtained from the coastal region of Southern Morrocco (Mirleft-South of Agadir), is used to determine the thermal balance and fit to dew mass evolution. In order to form global estimates of dew formation potential via our dew formation model, we combined different meteorological data with radiative properties of natural lawsonite condenser (CaAl2Si2O7(OH)2·H2O) to enhance the modelled dew yield. The daily modelled yields show that significant amounts of dew water can be calculated as a function of the condenser temperature, the thickness condenser as well as the wind speed.
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