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What’s Evaporative Cool and Why Is It So Good?

by Nathan Zachary

Evaporative cooling refers to the cooling of hot air using evaporated water. This is what happens if you step out of a pool on a hot summer day. Your skin feels cool and dry from the wind. This is because the water evaporates.

Evaporative Cooling In History

Evaporative cooling was used to cool the ancient Greeks and Romans. This was done by hanging wet mats directly in front of the tent and window openings. The mats kept the inside air cool through the heat of the air passing through them. These mats were an earlier version of modern-day cooling pads.

How Do Modern Evaporative Coolers Work?

The core of modern evaporative cooling is the cooling pads. Here water evaporates while air passes through and is then cooled. The evaporative cooling pads are made out of fluted, cellulose sheets that have been glued together. To prevent rot, the cooling pad is treated with special compounds. This guarantees a long lifespan and requires little upkeep.

Special water distribution systems distribute water across cooling pads to ensure a uniform water supply. This helps maximize cooling capabilities. Fans create a negative pressurized environment that draws air through the cooling pads. Evaporation is caused by contact between air-water. A control system controls the water pump and fans to distribute cool air.

The Benefits Evaporative Cooling Offers:

  • Clean, fresh air is better for your health and reduces the risk from viruses and bacteria
  • No refrigerants or chemicals
  • Low energy consumption
  • Equipment almost maintenance-free
  • Evaporative Cooling and Bacteria and Viral

Each of our evaporative coolants has air pre-filtering that ensures clean and healthy air quality. Combining this with the slight humidity from evaporative coolers, removes bacteria and slows down virus spread.

Evaporative Cooling and Bacteria and Viral

Each of our evaporative coolants has air pre-filtering that ensures clean and healthy air quality. Combining this with the slight humidity from evaporative coolers removes bacteria and slows down virus spread.

Evaporative Cooling and Humidity

A given volume can absorb water vapor at a specified temperature and pressure. The relative humidity of the air volume is defined as 65% moisture.

Evaporation can do more cooling if the day is hotter than the air. Also, cooling works best when you’re most in need of it.

Our evaporative coolers are built to be effective in high-humidity environments. The environment that you are trying to cool will affect how much humidity the coolers will raise. This slight increase is not visible in ventilated areas when the unit exhausts the air.

Cooling Capabilities

Below is the table showing the theoretical outgoing temperatures of an Evaporative Cooler at a given relative humidity. It is possible for the evaporative chiller to generate an output air temperature of 26degC with an incoming ambient temperature of 35degC and relative humidity of 30%.

What Does Evaporative Cooling Do?

The air is cooled by evaporative cooling using evaporated water. This is what happens when you leave a swimming pool after a hot day. Your wet body will feel chilled until it dries. This is due to the evaporating of water.

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