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Don’t desert your
desert coolers
IN spite of the craze for air conditioners in urban as well as upcoming rural pockets, desert coolers remain efficient and effective machines for cooling. Admitted that they are not very suitable in the humid conditions that prevail in our region during July to September, their effectiveness is demonstrated in the hot dry summer months of April, May and June. Being so much less expensive than air conditioning, it almost seems that we are getting something for nothing. Evaporative or desert coolers are energy-efficient since the motor which moves the fan has to move the air and not compress a refrigerant gas as is the case in an air conditioner. Energy savers The way a desert cooler operates is very simple. There is a low horsepower motor (popularly called the tullu pump). This pumps the water from the floor of the cooler to the top of the cooler, where it proceeds to fall down the sides, along porous filter pads. A second motor drives a fan which pulls air from the outside, through the cooler, and then pushes it into the hot room. The significant cooling action is the water evaporating as the air passes through it. The water level can
be kept constant with the help of a water supply connection. A
floating sphere similar to the one in the toilet flush tank needs to
be attached to stop water supply when the tank fills up. The hot air
enters the cooler, where two small motors power nothing more than a
fan and a pump, in order to send cool air into the hot room. In short,
the way the air is cooled in the cooler is similar to the way
evaporating sweat cools the human body.
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Easy to clean Before you put your desert cooler to use this summer, ensure that it has been properly cleaned and serviced.
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