Human body which precipitates sweat is the best example for evaporative cooling system.. The natural process of cooling that occurs through the phenomenon of evaporation is the process that is indicated by evaporative cooling. When our body sweats or perspires they get absorbed by our body heat and help our body to cool down in the process. The main principle that works behind this type of cooling is that heat has to be applied to any form of liquid so that it can change into a vapor. The body from which the heat is absorbed or is taken away is left at a cooler temperature.
The evaporative cooling systems are often used in the task of cooling down industrial machineries or for the purpose of cooling down buildings. A cooling tower is yet again one of the best examples of such cooling systems. Even the HVAC industry has a specimen of such evaporative cooling systems.
The HVAC Systems – In the HVAC system, the heat from the sun is absorbed by the building which is then picked up by the air handlers that happen to be tied to the refrigerant through indirect heat exchangers. The refrigerant gets boiled up due to the heat and transforms into vapor from its original liquid form. Next, water from the cooling tower is circulated to condense the refrigerant vapor through the heat exchanger. The cooling towers happen to cool the heated water that comes back from the heat exchanger. Later it can get reused as and when required.
The cooling tower in its opening section receives the warm water that comes back from the heat exchanger and is then sprayed all over the part of the fill. The fill has the required surface are so that the heat transfer is done properly between the air and the water. This makes the water portion to evaporate. This helps to cool the residual water, which is then returned for reuse at a later stage.
Closed Circuit Cooling Tower – in a closed-circuit cooling tower, a solution of ethylene or that of propylene glycol or even simple cold water us used so that the cooling can be done. Unlike what happens in an open circuit cooling tower, the fluid used for the process of cooling is often kept enclosed in a coil and is not exposed to the air in a direct manner. Cold water is used to circulate and again recirculate on the outside of the coil that has the heated-up fluid. This is one of the simple ways through which the heat of the warmed-up fluid is taken away in an effective, simple and fast manner. The cooled fluid is then brought back to the opening or the beginning of the coil so that it can be again reused at a later stage.
Popular Usage In The Industry – The principle of evaporative cooling is one of the most popular theories and concepts that are used in the context of various industrial arenas. It is used for its high affectivity, simplicity, and easy implementation. It is used in the making of various cooling systems used at home and in the commercial arena, and at the same time, it is also used for building cooling systems. Some of the noted commercial brands of the world make use of this evaporative cooling system.
Amongst the various tried and tested systems of cooling the evaporative cooling happen to be one of them. It is time tested, safe, and highly effective in various contexts.
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