Desiccant Rotors International Pvt. Ltd.
100-101, Udyog Vihar, Phase-iv.
Country : India
We are reckoned as one of the preeminent Manufacturers and Exporters of Arctic Coolers, also called Evaporative Coolers, Swamp Coolers and Industrial Ventilation Coolers. The unmatched quality and unsurpassable performance of delivering cool & refreshing air have made the Arctic Coolers highly demanded in the market. The Arctic Coolers, offered by us, comply with the international standards thus, are best suited for cooling applications for industrial and commercial buildings.
10 Standard Models Available : 6800 CMH (4000 CFM) to 170000 CMH (100000 CFM)
A reduction in temperature in the work place creates the obvious benefits of improved staff morale, increased productivity and a reduction in absenteeism: evaporative cooling can provide additional benefits :
Evaporative Cooling Concept : As the name implies, evaporative cooling works by evaporating water into the air stream. This principle is best illustrated in a personal way by chilling effect that you feel when you come out of a swimming pool and a breeze blows across your body! The chilling effect is caused by the evaporation process of the water drying quickly from your body. The same thing happens when you sweat. A “cool breeze” is just air flowing over your body evaporating the sweat. It is nature’s way of keeping us cool during hot weather or physical exertion.
Evaporative cooling is the use of this evaporation process to cool the air passing through a wetted cooling media. The cooling media could be as simple as a wet cloth. In fact, this process has been used for hundreds (if not thousands) of years. Hanging a wet cloth over an open window cools the air passing through the cloth.
In technical terms, temperature is measured in two (2) important ways that relate to evaporative cooling. These are “dry bulb” and “wet bulb” temperatures expressed in degrees Fahrenheit or Celsius. There are several other measurements that reflect the amount of moisture in the air. These are “dewpoint”, “grains of moisture per pound of dry air” and “pounds of moisture per pound of dry air”, “absolute humidity” and “relative humidity”. The following brief explanation of these measurements will help in the understanding of this process.
Dry Bulb : The ambient (surrounding air) temperature taken with a thermometer.
Wet Bulb : The lowest temperature level of the air that can be reached by evaporatively cooling the air.
Wet Bulb Depression : The difference between the Dry Bulb and Wet Bulb temperatures. I.E. if Dry Bulb is 100 degrees (f) and the Wet Bulb is 70 degrees (f), the Web Bulb Depression is 30 degrees (f). The Wet Bulb Depression depends upon the efficiency of the cooling media and depth of cooling media used.
Cooling Efficiency : The percent of the temperature drop across the media compared to the Wet Bulb Depression. I.E. if the Wet Bulb Depression is 30 degrees (f) (as in the above example) and the actual temperature drop measured across the cooling media is 27 degrees (f), the cooling efficiency of the media is 90%. (27/30 = .90). The cooling efficiency is also referred to as “Saturation Efficiency” because it refers to the amount of moisture that is packed into the air. 100% Saturation Efficiency would indicate a temperature drop of 30 degrees (f) in the above example of wet bulb depression.
Dewpoint : The temperature at which moisture begins to form on a slick surface indicating 100% saturation of the air with moisture. That is how the dew gets on the grass in the morning. The dry bulb air temperature drops to the wet bulb temperature level.
Grains of moisture per pound of dry air : A method of measuring actual water vapor (moisture) in a pound of dry air, Most often referred to as “humidity ratio”. I.E. 50 grains of moisture at 100 degrees (f) equals 12% relative humidity and 70 degrees (f) wet bulb at sea level.
Pounds of moisture per pound of dry air : Same as grains except weight of water vapor (moisture) is expressed in pounds. In same example above, the pounds of moisture would equal .009 # per pound of dry air.
Absolute Humidity : Actual measurement of water vapor in the air.
Relative Humidity : The percent of moisture in the air compared to the amount of moisture the air could contain. This is the most common reading to be reported in the weather reports. The report of “100 degrees and 12% relative humidity (RH)” is the same as all the above examples. Using the analogy of a glass half filled with water means the glass is 50% full. It could hold an additional 50% at which point it would start to overflow if more water was added.
Evaporation Rate : The rate at which water is absorbed into the air passing through the cooling media. For practical purposes, this rate is measured in gallons of water per hour (or minute).
Cooling Media : The Evaporative Cooling Pad (ECP), made of cellulose paper is engineered from cross-sectional specially treated flute media capable of absorbing and retaining water to provide the maximum cooling efficiencies. The cellulose media is treated with stiffening and rot-resisting agents to increase its useful life. The geometry of the cellulose media provides cooling without any water carryover as long as the air velocity through the pads is less than the recommended maximum.
The most efficient media is EcoCool Evaporative Cooling Media. The EcoCool ECP media is treated with anti-rot and regidifying resins. The media is cross-corrugated to maximize the mixing of air & water.
Saturation effectiveness ranging from 60 to 98% can be achieved depending upon air velocity and depth of the cooling pad.
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