Evaporative cooling reduces the temperature of the air via evaporation. The evaporative cooler, also called a swamp cooler, contains three major components: a pump (cooling pad), and a fan.
It’s simple to use the process. A pump inside the evaporative cooler pumps water from its reservoir to the evaporative cooling pads. This causes the pad to become wet. In the cooler, there is a blower that draws air from the outdoors through the wet pad. As the air flows through the pad, it is evaporated to cool the air.
When it comes to evaporative cooling systems there are two temperatures you should consider. These are:
The ambient air’s normal temperature is known as the dry bulb temperature. This temperature can be measured with a thermometer.
It is possible to get the lowest temperature from water alone.
Liquid water must be transformed into vapor using energy. The air is the most common source of this energy. The cool air inside the cooler transfers heats energy into the water, which causes it to evaporate. The air passing through the cooler’s dry bulb temperature is reduced, and it is returned to its surrounding environment. An important fact to note: Water temperature has no impact on the amount of cooling that is achieved by evaporation.
Evaporative cooling will not function properly without the proper air humidity. Evaporation is activated when the relative humidity in the air drops below 100 percent. The lower the relative humidity is, the more effective the evaporative cooler process. The wet bulb temperature and dry bulb temperature are used to determine the potential for effective evaporative cooling. These two variables determine relative humidity.
Statistics show that the United Kingdom has an average humidity of 88-92%, depending on where you live. However, this is not the case when it is hot. This is the perfect setting for evaporative coolers, especially in the food and bakery industries. The temperature at peak times can drop to 10 to 12 degrees Celsius.
What Are Your Thoughts On Evaporative Coolers?
It is important to distinguish between an evaporative cooler and an installed or portable system. The evaporative cooler does not have exhaust lines or external condenser boxes. They also do not provide refrigerants, like air conditioners. However, they do provide ‘cooled’ air.
Evaporative cooling is attractive because of its extraordinary cost-efficiency. This includes the possibility to lower your operating expenses by up to 90 percent. Furthermore, it is environmentally friendly as it does not introduce refrigerant-free oxygen.
How To Maximize The Effectiveness Of Evaporative Cooling?
It is important to ensure that every cooling pad is completely saturated throughout the operation. You also need to make sure that your system’s fan is properly sized and calibrated to create the necessary airflow.
However, evaporative coolers may not always be the best option for you. They might be inappropriate depending on your industry, installation location, and environment. Here are some limitations to the proper use of evaporative coolers:
- They are not to be used in enclosed spaces or unventilated places as they depend on fresh air movement.
- Since they were filled with water they can cause humidity to build up in the area. This could lead to damage to electrical systems.