Heat Transfer Today

Educational Software for
Heat and Mass Transfer

Student Projects

Evaporative Cooling of Water in a Lister (or Lyster) Bag

In this project we approximate the water-containing, semi-permeable, canvas bag (known as a Lister bag) as a “lumped capacitance” and use standard forced convection correlations for a cylinder in crossflow to find the sensible and latent heat transfer (the latter associated with evaporation from the outer surface to the bag). With this information we predict the temperature-time history of the water as a function of atmospheric conditions including wind speed, air temperature and relative humidity. This project makes extensive use of the air-water property spreadsheet in HTT.

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