Evaporative Cooling of Water
Use the slider to select the mass of water to evaporate and then click the play button to turn on a vacuum pump that removes water vapor from a well-insulated tank. The tank initially contains 10 kg of liquid water at 40°C. Water evaporates because the pump decreases the water partial pressure below its saturation pressure. The energy to evaporate water is obtained by cooling the remaining liquid water, and then freezing some of the liquid when the temperature reaches 0°C. The bar graph on the right shows the amounts of liquid and solid water in the tank and the amount of vapor that evaporated. In the tank, the remaining liquid is blue and the solid is green. The amounts of each phase are determined using unsteady-state mass and energy balances.
This simulation runs on desktop using the free Wolfram Player. Download the Wolfram Player here.
This simulation was made at the University of Colorado Boulder, Department of Chemical and Biological Engineering. Author(s): Rachael L. Baumann
View the source code for this simulation