Water cooling by evaporation from an earthenware jug
Model is from the paper by J.I. Zubizarreta and G. Pinto (see references). This model provides a "quantitative explanation of an ancient method of chilling water." Earthenware pitchers with a spout and handel (botijo in Spanish) have been used to hold and chill drinking water. The slightly porous, clay-based pot allows water to transfer through the wall of the pitcher and evaporate into the ambient environment. The energy needed for evaporation (i.e., latent heat of vaporization) is balanced by a reduction in the internal energy of the liquid inside the botijo. REFERENCES: Zubizarreta, J.I. and Pinto, G. An Ancient method for cooling water explained by mass and heat transfer. Chem. Eng. Educ. 1995, 29, 96.
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