Since Evaporative cooling is related to humidity level, the following chart shows how much cooling you can get from evaporative Air coolers based on Outside ambient air temperature and humidity.

Here is the Bad news , as we all know Dubai weather is humid, so you can’t Expect much from evaporative cooling during the most humid month. But since Air coolers can move a lot of air, you can get in addition to cooling from Evaporative cooling , you’ll feel more cooling from the huge air flow fan.

The best thing about Evaporative air coolers that they use much less energy than conventional air conditioners, and can provide much more air flow.

Actually for outdoor cooling application there is no better way to do it than Evaporative cooling, because the need of huge air flow in open areas.

On the other hand, for Indoor cooling, temporary cooling or spot cooling, The conventional portable AC is best option to go. This applies to backup data center or tent cooling which is a common in Dubai and other Emirates.

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Evaporative Coolers (Desert air coolers) or what We call here as evaporative outdoor AC and its function are pretty simple, and anyone can easily understand. These make use of an air blower, evaporative pads, recirculating water pump and a ball float valve. This type of cooling can be considered as an injection water vapor which takes heat from the surrounding, this heat is called as the sensible heat and is slowly changed into latent heat at constant enthalpy (evaporative cooling simpler explanation). This cooling causes a considerable temperature drop and brings comfort. These Evaporative coolers prove real feasible since they take only a fraction of energy as compared to the air conditioning systems and are completely eco-friendly.

Cut down your electricity bill.

We are often burdened with high electricity bills in Dubai that have gradually made a hole in our pocket. Today, we try to cut down on every expense and look for energy efficient appliances, which help us to cope up the high burden of the electricity bills that, keep increasing each month, we need to switch to energy efficient methods even. Evaporative coolers take only a fraction of the energy as compared to the air conditioning system that one may have at home. At the cost of running of one A.C., one can run ten evaporative coolers which seem a good option to switch. Moreover, they even cater for your outdoor cooling which even your portable air conditioner would fail to do. High bills? It’s time to get home an evaporative cooler.

Other options available like industrial evaporative air cooler, misting fans, and mist fogging system, using the same concept of evaporative cooling to beat the heat in Semi-open/open to sky areas and as spot coolers/spot cooling solution.

Elegant new design good performance portable outdoor air cooler (evaporative air cooler conditioner, swamp cooler or wet cooler)

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User and operation issues:

Operating the cooler within its operation conditions is a must. And using it correctly is not less important. Some of important tips that apply to most portable evaporative AC’s are:

• Do not keep or operate the cooler under the sun (unless you have no option)

Even-though the portable air coolers are for outdoor use, that doesn’t mean all models are UV resistant. This means that some models’ body material might degrade from sun rays. Also keep in mind that the extremely hot sun (like in UAE) lower the cooler efficiency noticeably.

• Do not flip the cooler on side or upside down even in storage

Most portable evaporative AC’s have water tanks with float switches and submersible pumps. And while everything might seem fine to you from outside, These components inside might get affected by the flip. If the float protecting the pump is de-positioned, the pump might run dry with no water and burn. Or the tank might get over-filled if its float stopped working.

• Operating in extreme humid conditions

This is actually energy saving advice rather than maintenance. When humidity goes around 90%, the evaporative cooling efficiency in near to zero. So better to switch-off the evaporative cooling and run fan only. Also some add ice to water tank and keep it running.

Routine and preventive maintenance:

Good maintenance of evaporative air coolers will make the coolers last more and work more efficiently. To keep up the air cooler in shape,there are some tips to follow:

• Cleaning inlet air filters

These are the visible filers that come before the evaporative pads. Since they are mostly visible and easily accessed without any disassembly, this process is very easy and takes a couple of minutes only. They need to be cleaned frequently as needed, at least 1 time per month.

• Cleaning the evaporative pads

These pads that come mostly in honeycomb shape are critical to the cooler operation. There are windblown dust and dirt that get gathered in the pads , making muck and obstructing air flow and water delivery. Even cause smell if unmaintained for long time. These need to be cleaned 1-2 times per year, and replaced every 2-4 years.

• Cleaning the water tank

You need to clean and sanitize the internal water tank at regular intervals. To prevent the development of residue, organism and green growth inside the air cooler. The cleaning process is like cleaning the drinking water tank. The tank of the air cooler need to be cleaned at 1 time per year.

• Visual check

Whenever you open the back of the evaporative cooler, you could see most of the internal parts. Take a look at the hoses condition, floats and pump position at bottom of the tank.

We wish that these tips help and let your air cooler work efficiently and effectively.

Last edited May, 15th, 2019

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