I've been trying to figure out how to explain this. But basically what's going on thermodynamically with a swamp cooler is a classic adiabatic process, jargon f

I've been trying to figure out how to explain this. But basically what's going on thermodynamically with a swamp cooler is a classic adiabatic process, jargon for the total energy doesn't change. When you evaporate water into dry air. The total energy doesn't change[1]. But it take energy to evaporate water. So where does the energy come from? By reducing the temperature of the air. [1] I think the entropy increases which is why it's favorable.