Evaporative Cooling Systems
Evaporative cooling is the name given to the adiabatic process when applied to this ventilation technique. One should accept the principle that, in warmer weather, any production area will be at a temperature above that outside air temperature as a result of the internal heat load, irrespective of the ventilation level in use. This is because the energy used in electric motors, lighting and by the operators all results in a heat load on the area, increasing the temperature. Even with a significant amount of ventilation, this must result in a temperature rise.
The simplest way to offset this, is to provide an air input at a reduced temperature. Air conditioning is very often impracticable in manufacturing environments due to the large air volumes involved and hence high capital and operating costs. The alternative is evaporative cooling which, by evaporating a small amount of water into the air causes, under most conditions, a reduction in the temperature. Even in UK summer weather this reduction can be as much as 10°C at times, which can have a significant impact on the performance of the ventilation system. By inputting cooled air, the internal conditions can be maintained at temperatures at or below the outside ambient, even taking account of the heat gain inside.
The evaporative cooling technique is employed in the Econoclim product range and operates with very low running costs, using a small amount of water from a direct supply. The inherent design has added features making it a totally safe and reliable process ideally suited to manufacturing production areas across food, packaging and print industries.
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