Why Does Evaporation Cool Water? — Companion Booklet (Part 2 of 3

Part 1 showed the water path through a cooling tower. This booklet goes a level deeper: the molecular reason evaporation actually removes heat, and why the fill is doing far more work than it looks like. It also revisits the Part 1 worked example from the energy-balance side, showing exactly where the 2,260 kJ/kg figure comes from.

What's inside:

• The molecular explanation for evaporative cooling, with a diagram showing why only the highest-energy molecules escape as vapour
• A glossary covering kinetic energy, latent heat, sensible heat, saturation, and mass transfer
• A revisited worked example splitting the Part 1 heat load between latent and sensible heat, plus a "try it yourself" problem with the answer included
• A side-by-side comparison table of latent vs sensible heat transfer in a real tower
• A visual explainer on why breaking water into droplets multiplies surface area, with a worked comparison
• Why the surrounding air's humidity limits evaporation, and why that sets up the next booklet's topic
• A real-world look at hybrid (wet/dry) cooling towers and why some sites use them
• Common misconceptions, cleared up
• A full recap of the cause-and-effect chain behind evaporative cooling