Evaporative air coolers are low cost cooling method which now a day’s commonly use in heated areas like Dubai, Abu Dhabi, Oman, Qatar, Doha and other Middle Eastern Countries. Evaporative cooler provides excellent cooling at minimal power consumption by using normal tap water as working fluid. One of the most useful advantages of evaporative cooler is that it doesn’t increase global warming as that of air conditioner which use compressor and different refrigerant gases as cooling fluid. Evaporative coolers are available in different sizes depending on its applications. Industrial air cooler are of mainly Portable type Industrial air cooler or ducted type evaporative cooler.
Evaporative type air cooler mainly consists of energy efficient motor to rotate fan and water pump. It also consists of cooling pad. Size of cooling pad, fan, motor and cooler depends on quantity of cool air required per hour from cooler. Water pump pumps water on cooling pad and make it wet and at same time fan extracts air through pad and through on other side. Since air passes through wet cooling pad it gets cool. In New technology evaporative cooler or desert cooler are coming with great feature. New cooler are coming with control panel from which you can adjust fan speed, set timer, get alarm if water tank is empty etc.
Advantages of Evaporative cooling are that Evaporation is a highly efficient natural heat exchange process because there is no third element in the exchanger. As the air is in direct contact with the refrigerant, in this case water, the heat is transferred extremely efficiently. In compressor systems, the exchangers involve a third element – the metal coil in the "evaporator"
Evaporative air conditioning uses between 25 and 70% less energy than air conditioning, brings in 100% outside air and utilizes water for cooling instead of HCFC's. In addition maintenance is minimal requiring just an annual pad clean, or change, compared to air-conditioning which requires a bi-annual filter change. Last but not least, there are no HCFC pollutant emissions from evaporative air conditioning and water consumption is moderate. That all adds up to very responsible environment and energy saving behavior. Conventional air-conditioning impacts significantly on a building’s operating costs as it uses in excess of 25% of the building's energy consumption. It therefore makes sense to create a pleasant environment for workers to maximize productivity whilst at the same time minimizing energy costs. Evaporative cooling enhances the well being of individuals in areas where ambient temperatures are high, providing comfort cooling in buildings such as schools, libraries and offices. It is also the best, and often the only solution for commercial and industrial applications such as greenhouses, laundries, warehouses, factories and commercial kitchens.
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