Water cooling by evaporation from an earthenware jug

Description

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.

Equations

The equations for this model may be viewed by running the JSim model applet and clicking on the Source tab at the bottom left of JSim's Run Time graphical user interface. The equations are written in JSim's Mathematical Modeling Language (MML). See the Introduction to MML and the MML Reference Manual. Additional documentation for MML can be found by using the search option at the Physiome home page.