How do evaporative cooling systems work?


Evaporative cooling is also known as adiabatic cooling. The evaporative cooling systems will work on the principle of water evaporation, where the air is cooled to a comfortable temperature. It is one of the cooling and ventilation techniques that use water as a refrigerant. During the evaporative cooling process, the water evaporates in the air stream and turns from liquid to gas. This transformation requires energy extracted from the air in the form of heat as a result of this process, the air is cooled.

What is evaporative cooling?

Simply put, evaporative cooling can be described as a process that heats water that converts it from liquid to vapor because cooling through evaporation is a natural occurrence. The most common example is perspiration. You could say that evaporative cooling provides cooling on the same principle as perspiration.

When dry, hot air enters the refrigeration unit. It goes through a dampened cooling pad. The water will evaporate, and the heat will be absorbed. As a result, lower-temperature air is pushed into the house. The combination of moving parts reduces air temperature and circulates cool, 100% fresh air throughout the house.

Evaporative Cooling System: How It Works?

In an evaporative cooling system, the hot outside air is forced through a wet cooling pad using a motor-driven fan. The cooling pad is continuously humidified by a water pump that delivers water to the cooling pad. The cooled air is blown into the building, and the exhausted air is cooled to between 60 and 90 % of the wet bulb. Depending on the efficiency of volatile substances, the air coming out is 10 to 15 °C cooler but has higher humidity.

On the other hand, two-stage evaporative cooling offers up to 114% efficiency of wet-bulb. This results in a temperature drop of up to 17 °C, and due to the lower temperature therefore, it has 60% less moisture than the direct evaporative cooling process.

Why will evaporative cooling important?

An evaporative cooling using indirect/direct system is a sustainable and highly energy-efficient cooling solution. This provides a comfortable and productive climate for the manufacturing plant, distribution center, and office building. The evaporative cooling process in indirect/direct cooling uses 10% of the energy required for mechanical cooling. While providing the same temperature as traditional mechanical cooling systems, evaporative cooling systems also do not circulate warm and polluted indoor air. Unlike mechanical cooling Instead, 100% fresh, filtered, clean, and cool air is ventilated into the room or building; as a result, indoor air quality is greatly improved.

Maintenance of evaporative coolers:

Although evaporative coolers require very little maintenance, repairs can cost you a lot if you don’t clean them regularly. You can save money and hassle by regularly ventilating because there will be an accumulation of minerals and sediment that must be removed regularly.

It also helps if you change the cooling pad once in 2-3 years if water is soft and TDS is less than 500 ppm,otherwise it may require water from a softner plant. However, how often you need to change the filter also depends on the unit you use. You can read about the frequency of servicing of evaporative coolers.

Why choose an evaporative cooler?

In addition to keeping you cool in the summer, there are still some advantages to installing environmentally friendly and energy-efficient evaporative cooling systems in your home. Evaporative cooling systems use moisture to lower the air temperature. This means you won’t have to deal with issues like dry nose, skin, or eyes. These cooling systems are ideal for people with allergies or asthma. There is no doubt that evaporative coolers are more energy efficient and have lower operating costs compared to popular cooling systems. You will be surprised to know that when it comes to installation. They only use a quarter of their energy. Suppose you don’t want electricity bills to be too high in the summer. You should seriously consider evaporative cooling systems.

The evaporative cooling system delivers fresh, clean, filtered air. You need to know that evaporative cooling systems do not use recycled air like air conditioners. No one can deny the current concern about the use of refrigerants in air conditioning technology and its impact on the environment. No refrigerants or chemicals are used in evaporative coolers, and they are an environmentally friendly option that creates a healthy indoor and outdoor environment.It can help you to contribute your little bit towards reducing global warming .