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Evaporative Cooling System Design, Efficiency & Working Principal Process in El Paso, TX

Using the evaporation of water to provide cooling has been with us since ancient times. Beating the summer heat in places like Mesopotamia and Nile certainly had its adherents in the upper class. In ancient Egypt and Persia breezes blew from predominate directions. These were captured and sent through a chamber where there was water. As the water absorbs the heat from the air and evaporated, the air was cooled the breezes circulated it through the palaces.

Water Has a High Heat of Vaporization

Evaporative cooling runs from the use of misters to cool patios and porches, single room units to systems for the whole house. The fine water mist absorbs heat on evaporation and cools the air. Any breeze blowing through helps to circulate the air. Water has what is called a “high heat of evaporation”, meaning water absorbs relatively high amount of heat before evaporating. In farming communities that experience high heat, a noticeable drop in temperature is experienced as you pass by fields under irrigation. This is due to the evaporation of water. Plants, particularly trees as they transpire produce a cooling effect from the evaporation of water off the leaves. Trees not only provide shade but are nature’s evaporative cooling apparatus.

Evaporative Cooling System Design & Working Principal

In home evaporative systems the ‘swamp cooler’ draws air from the outside. Fiber pads hold water that is pumped to them. As the warm air is drawn through the pads it picks up water that evaporates cooling the air. The air is then ducted into the house. Evaporative coolers work good in high temperature, low humidity conditions. The lower the humidity the better, at a 100 °F (38 °C) and a relative humidity of 5% a drop in temperature to 71 °F (21.6 °C) can be expected. But at 50% humidity the drop will be only 12 °F (7 °C) to 88 degrees Fahrenheit (31 °C).

Evaporative Cooling Efficiency

Having only to run a relatively low amperage fan motor vs. compressors and fans, the evaporative cooler is very economical in comparison to the typical air conditioning or heat pump system. Misters can be adapted as a pre-cooler for your A/C and pre-cool air flowing through the condenser improving the efficiency of the air conditioner and lowering power consumption and are available in kit form. Commercial A/C equipment use pre-coolers as well.
Evaporative cooling works on high bulk airflow. In the US the unit used to measure airflow is CFM or cubic feet per minute. A 1500 square foot home with 8 foot ceiling needs to circulate 6,000 CFM for effective cooling. Many have ducts in the ceilings to promote circulation through the addict, cooling the addict as well, or simply crack open a window a bit.

Evaporative Cooler Installation, Emergency Repair, Preventative Maintenance & More in Greater El Paso, Texas

Some installations piggyback both A/C and evaporative systems to provide cooling in high humidity conditions.
With evaporative coolers the temperature will drop but interior humidity will rise. A two stage evaporative cooler recirculates the interior air through a heat exchanger serviced by the evaporative stage of the cooler. This allow for cool, but drier air in the interior of the home. A water pump and blower in the ‘wet stage’ operates the evaporative cycle, while the dry stage circulates interior air. The stages interact through the heat exchanger.
Economic cooling is the prime advantage of an evaporative cooler in low humid areas, and a possible consideration for new construction. Portable units are available to provide cooling on a room by room basis. Call the professionals at Rush Maintenance Heating & Cooling for consultation for all your air conditioning needs.

History & Benefits of Evaporative Coolers in El Paso County, Texas

An old time joke was that a car air conditioner was either a 2/40 or a 4/40. That is two or four windows down at 40 mph so the sweat on your body would keep you cool. It actually works; just ask grandpa!

History of Evaporative Coolers

History tells us that evaporative cooling was used by the Ancient Egyptians; wet blankets were hung on the doorways and the servants (to mostly royalty) would fan across them and jugs of water. The hot air that passed over or through resulted in cool air! Then in the early history of America, around 1750, Benjamin Franklin was in Philadelphia on a 100 plus degree summer day, writing in just a shirt and light trousers. As he was miserably uncomfortable, he noticed that when he changed his shirt the dry one was hot and offered no real relief. He experimented with some ideas he had on seeking comfort in such conditions. What he concluded was that he was not being cooled by the hot air that blew through the windows, but it was the perspiration evaporating off his body that offered relief! He set up an experiment to prove his hypothesis, using a thermometer and spirits (alcohol) which evaporated quicker than water. By blowing air across the bulb he was able to have ice freeze on it; a chemical reaction on a molecular level. An evaporative cooler works by harnessing this chemical reaction!

Benefits to Evaporative Cooling

The use of evaporative coolers is cost effective (lots cheaper) and also environmentally friendly as it has no hydroflourocarbon emissions. Evaporative cooling uses water while refrigerated air conditioning uses refrigerant. The initial cost of evaporative cooling is about a quarter less than the cost of a refrigerated air system and the maintenance costs are lower too! So why doesn’t EVERYONE have evaporative coolers? If you live in the arid southwest like El Paso, evaporative coolers can be very effective and will add humidity to your home, but if you happen to live in high humid areas, evaporative coolers do not work. An evaporative cooler replaces the air in your home with cooler humidified air, where as the refrigerated air conditioner just produces cool air to be blown into your home and will remove the humidity. Evaporative Coolers are used in many residential, commercial and industrial settings because they are cost effective and provide excellent results. Industrial plants, commercial kitchens, dry cleaners, green houses, warehouses and repair garages use units especially designed for large areas. The oldest model of evaporative cooler is YOU! The human body sweats and the movement of air around you evaporates which cools you down. The human body is an amazingly efficient cooling machine!

Evaporative Coolers in El Paso, Texas

Rush Maintenance Heating and Cooling specializes in evaporative coolers, as well as other types of air conditioning and heating units. Serving El Paso and surrounding areas which is the perfect environment for evaporative cooling. In the heat of the summer, don’t sweat it out, call us for a free estimate. We are family owned and treat all our customers with a ‘cool’ head! Wishing all a happy, healthy and cool summer!