Swamp cooler pads are an economically- and environmentally-friendly solution to lower the temperature and add moisture, to the environment. They use the natural process known as evaporation for cooling the environment.
What Is The Origin Of Swamp Coolers?
The concept of utilizing evaporated liquids, or the process that turns liquid into vapor, can be traced back at least to ancient Egyptian and Persian societies. Persians employed a form called evaporative chilling. In this case, a structure called the wind catcher directed wind through a channel of liquid called a “qanat”. The evaporation process was used to cool buildings. In more modern, people used to sleep outside or on their porches with their windows opened to dry out wet sheets and circulate cool, moistened water through fans.
Why Then Are They Called “Swamp Coolers”?
You may now wonder where the “swamp cooler” phrase comes from. Aspen pads were used in the beginning days of mechanically evaporative coolers to absorb water. They also used evaporation’s cooling properties. This caused a musty, moldy aroma that was similar to a swamp. But don’t worry, since the days of the wooden cooling pad with a musty smell, electronic coolers have made great strides.
Just How Do They Work?
Evaporative air coolers work by using the process called evaporation. Now imagine that you’re outside on a hot July morning, sweating through the shirt and looking for some relief. Then you notice that the breeze is blowing and you feel the heat evaporate.
How is that possible? The process of evaporation forms a mixture containing water molecules. This process is dependent on heat power. You then get cool, humid air as the heat has been dissipated. This is why evaporative coolers are found near lakes or waterfalls.
Evaporative coolers mimic this effect. They have a fan, a tank, and a pump system. This draws in dry heat through a moist cooling medium. It absorbs and holds water from the reservoir. These media are also called cooling pads. They are usually made from corrugated and cellulose sheets. They have been chemically treated to prevent the media from rotting. The fan draws warm and humid air through this media. After evaporation converts liquid water into water vapor, the fan blows the cool air out. Honeywell Evaporative Air Coolers are made with a honeycomb cooling medium, which allows for better cooling efficiency. The increased surface area of the cooling media encourages more humidity to flow into the air.
The extra moisture in your air encourages an evaporative cooler on your skin. This is more effective than just airflow. The moisture doesn’t get sprayed all over your skin, but it does raise the general humidity level. The temperature produced by the cooler depends on its temperature and humidity. This means you’ll experience a greater temperature drop in hotter and dryer climates than you would in warmer, more humid climates.
When indoors, make sure to provide ventilation. Open a window/door when you use an air cooler to let warm air escape the room while it is being replaced with cool. Ventilation can also be used to keep indoor areas from becoming too clammy, due to excessive saturation.