The benefits of direct evaporative cooling
Evaporative cooling technology is the right solution for commercial, industrial and open air cooling in the Middle East, states Seeley International
Keeping cool can be a big issue in the UAE, which has high-ambient temperatures all year round, especially in the summer months. Air conditioning sometimes is not a good option to cool commercial and industrial premises, as capital and running costs of these units are often extremely prohibitive. This is particularly true when we need to cool large spaces with high ceilings. The same thing happens when considering open or semi-open spaces, and therefore, traditional air conditioning is not an option.
The solution to all these situations can easily be found in evaporative cooling, which is fast becoming the most efficient option when cooling large areas or open (and semi-open) spaces. Seeley International, headquartered in Adelaide (South Australia), has been producing evaporative coolers since 1972, and manufacturing most of the components for its products within Australia.
Xavier Delaigue, Sales Manager for Seeley International, Europe, Middle East and Africa region, says: “Breezair, our top selling brand of direct evaporative coolers, has soon become the best example of evaporative coolers in the market and it is famous worldwide for unbeatable quality and performance.”
Most industries with high heat loads, such as printing, ceramics, glass, rubber or electronics, have no cooling systems installed, because of the high capital and running costs, and this impacts workers’ morale, productivity, and health. In places where businesses have traditional cooling systems installed, they rely on recirculating the air in the indoor space, and that stale air can contain fumes and germs. More crucially, premises such as warehouses or big storage rooms, especially when dealing with food and perishable products, have specific temperature requirements. “In these environments,” continues Delaigue, “direct evaporative cooling could be the right solution because it doesn’t use chemical refrigerants to cool the air; instead it just uses a water pump to supply water to the wetted media where evaporation occurs and electrical power for the fan that then pushes the air inside the building.”
Often commercial or industrial buildings have small spaces that are hot and uncomfortable to work in. These hot spots can be caused by heat from machines, manufacturing processes, or trapped hot air behind large glass windows. These spaces are not just hotter than the surrounding interior areas of the building, but hotter than the external conditions too. A better, more intelligent solution, is to use Breezair evaporative air cooling to blanket the hot spot with a flow of cool, high velocity, fresh air, designed to impact workers whenever they are in that hot location: this is called “Spot Cooling.”
“The biggest objection that people raise against evaporative cooling technology is that it doesn’t work everywhere in the Middle East climate because of humidity,” says Delaigue. “First of all, relative humidity and temperature are inversely proportional; during the periods where temperatures are high and humidity is low, there is more “space” for evaporation to occur, and therefore, for evaporative coolers to work better. This means that evaporative coolers’ performance increases with temperature, which is also great for reducing power bills, in direct contrast to refrigerated systems, which require increasing amounts of power when it’s hotter. Moreover, we have a lot of successful installations in the Middle East, which prove the potential of this system in this climate. We have installed evaporative coolers in factories, warehouses, open air terraces (restaurants and bars), gardens, vehicle testing facilities and automotive workshops. Here, in Ras al Khaimah, we have installed units in one of the most important ceramic manufacturers in the world.”
“Middle East is one of the key markets for Seeley International,” adds Sam Peli, General Manager Sales, for Europe, Middle East and Africa region. “A system like Breezair, using no harmful synthetic refrigerants and providing a saving on running costs up to 90% when compared with refrigerated air-conditioning system, will soon become the best option for cooling, due to the rising cooling capacity of the units and the increasing awareness over running costs control and green technologies. We are proud to be world leader in evaporative cooling solutions. With offices all over the globe – Italy, France, United Kingdom, USA, South Africa, and of course, Australia – we export in over 120 countries and never compromise on our quality,” Peli continues. Breezair boasts superior cooling efficiency and robustness.
With over 40 years of experience in evaporative cooling products, Seeley International is committed to innovation and excellence. To support innovation at Seeley International, the company has an “Imagineering” group which includes many of the 50 engineers employed by the company. They meet regularly to discuss revolutionary, “over-the- horizon” product innovations, which have received many industry accolades, particularly for the indirect evaporative cooling product “Climate Wizard,” under the category “Best Manufacturer – Standalone cooling.” Climate Wizard still relies on cooling the air with evaporation of water via a heat exchanger. The air cooled from evaporation is separated by the air supplied to the space, thanks to this innovation, the air supplied is colder and there is no moisture. Climate Wizard can be used as a standalone solution or in conjunction with a traditional air conditioner, to precool the air. When used with a traditional air conditioner unit, the consumption of traditional unit would be dramatically reduced, resulting in consistent savings in running costs.
Seeley International had recently organised a seminar in Arjaan by Rotana in Dubai Media City, in cooperation with ASHRAE Falcon Chapter, with the purpose of raising awareness of evaporative cooling technology amongst Middle East engineers.