Pulling from ancient cooling principles, the ‘swamp cooler’ remains important today
Summary
The article explains how evaporative coolers, also called swamp coolers, use ancient cooling methods to cool dry air by passing it through water-soaked pads. These low-cost, energy-saving devices remain useful today, especially in dry areas of the southwestern United States, as an alternative or complement to traditional air conditioning.Key Facts
- Swamp coolers cool air by pulling hot, dry air through wet pads, causing evaporation that cools and humidifies the air.
- The cooling principle dates back to ancient times when air was fanned over water in clay pots.
- Oscar Palmer perfected the first evaporative cooling system in Arizona in 1908.
- Swamp coolers became popular in southwestern states like New Mexico and Nevada by the 1930s.
- These coolers work best in dry climates but are less effective in humid areas where the air already contains moisture.
- Innovations are combining evaporative cooling with technology that manages humidity for better results.
- Traditional air conditioning became common in the U.S. only after the 1950s, and central AC is still costly for many.
- Evaporative coolers offer a low-energy cooling option that can reduce reliance on conventional AC and lower greenhouse gas emissions.
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