Evaporative Cooling By Using Different Porous Materials

Abstract

The method of evaporative cooling involves raising the air temperature by causing water vapour in an airstream to evaporate. Water
needs the latent heat of vaporisation to evaporate, and this heat is produced by ambient air and a drop in air temperature. A porous
medium is necessary for both direct and indirect evaporative cooling in order to allow heat and mass transfer between the medium's
water and the air moving through it, or between dry (product) and wet (working) air.
Due to its ability to chill air through the evaporation of water, evaporative cooling has found widespread application. The structural
(Porosity, Specific surface, Tortuosity) and defining (Wicking height, Diffusivity, Evaporation rate) properties of porous materials
may serve as crucial determinants when choosing the best porous materials.
Numerous researchers have examined the effects of evaporative cooling using a variety of porous materials. Using a variety of porous materials,
such as cotton, soil, and finely ground wood, this paper seeks to investigate the cooling effect and determine the saturation efficiency of the system.
In this paper, the saturation efficiency and performance of different materials are compared. The inner cylinder of this setup absorbs latent heat for
vaporisation as the filler material is positioned between the inner and outer cylinders; as a result, the inner cylinder cools and is ideal for the
storage of perishables. The conclusions made in this research were geared toward the usage of these inexpensive porous materials for refrigeration.
Cotton has demonstrated a maximum saturation effectiveness of 86%, followed by soil with 83% and crushed wood with 76%.