Numerical Modeling of Lawsonite Thin Film as Radiative Cooling Minerals for Harvesting Dew
Radiative cooling is the phenomenon responsible for dew formation on plants. Harvesting humidity from the air has two different pathways: fog and dew, but harvesting dew have not been sufficiently exploited. In this paper, we describe the resources for radiative cooling as well as lawsonite mineral for exploiting this natural phenomenon. Further, this paper describes the development of dew harvesting systems for use in the semi-arid mirleft south Morocco. Numerical simulations using the energy balance equation were performed. Harvesting dew can be used as a renewable complementary source of water both for drinking and agriculture in specific arid or semi- arid areas. In order to form global estimates of dew collection potential via a dew formation model, we combined meteorological parameters with radiative properties of a specific collector sheet (natural lawsonite, CaAl 2 Si 2 O 7 (OH) 2 •H 2 O deposited on glass) to enhance the dew yield. The daily yields show that significant amounts of dew water can be collected.
