What Is Evaporative Cooling?

Evaporative Cooling is defined as the “reduction in temperature resulting from the evaporation of a liquid, which removes latent heat from the surface from which evaporation takes place.”

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The Science of Evaporative Cooling

Evaporative Cooling is defined as the “reduction in temperature resulting from the evaporation of a liquid, which removes latent heat from the surface from which evaporation takes place.” This process is the physical basis of sweat, and beyond sweating, evaporative cooling is the process responsible for the cooling effect experienced after having a swim or hot shower.

Evaporative cooling towers harness the natural power of evaporative cooling to reduce the temperature of water used in industrial processes and in commercial HVAC comfort cooling systems.

What Is a Cooling Tower?

Cooling towers are specialized heat exchangers in which air and water are brought into direct contact with each other to reduce the water’s temperature. As this occurs, a small volume of water is evaporated, reducing the temperature of the water being circulated through the tower.

Water heated by an industrial process or an HVAC system condenser is pumped to the cooling tower through piping, which is then sprayed through nozzles onto layers of heat transfer media called “fill.” Fill helps to slow the flow of water through the cooling tower and creates greater surface area for the water to spread for maximum air-water contact.

As the water flows down the fill, air is being pulled through the tower by a motor-driven fan. When the water and air meet, a small amount of water is evaporated through the evaporative cooling process. The resulting cooled water is then pumped back to the HVAC condenser or industrial process equipment where it again absorbs heat and then returns to the cooling tower in a continuous cycle.

Types Of Torri di raffreddamento

Evaporative cooling towers are designed and manufactured in several types and size categories. Understanding the various types, along with their advantages and limitations, is important when determining the best evaporative cooling solution to meet project requirements.

Torri di raffreddamento a flusso incrociato
In crossflow cooling towers the water flows down through the heat transfer fill vertically while the air flows across the flow of the falling water horizontally. Because of this, air does not have to pass through the water distribution system. In crossflow towers, gravity flow hot water basins are mounted at the top of the cooling tower above the fill media.

View all crossflow cooling towers

Torri di raffreddamento in controcorrente
Counterflow cooling towers are designed so that air flows vertically upward, counter to the flow of water falling downward in the heat transfer fill. Because of this vertical airflow, counterflow towers use pressurized pipe and nozzle systems to spray water onto the heat transfer fill, which are spaced to allow adequate airflow.

View all counterflow cooling towers

How Do I Choose a Cooling Tower?

Cooling towers should be chosen based on a variety of factors, including your system type, water quality and climate. If you already have a plan in place and would like to compare your options, sign up or login to our product selection program, CoolSpec.

Or, if cooling towers are not your specialty, reach out to a local Marley representative or service professional by filling out the form below:

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I nostri clienti parlano: sentite cosa hanno da dire:

"Marley è stato il marchio da cui ho imparato tutto sulle torri di raffreddamento. Ancora oggi, utilizziamo Cooling Tower Fundamentals come guida di riferimento per i nuovi ingegneri che entrano in azienda".

"Con i prodotti SPX Marley, possiamo sempre confidare che le prestazioni di raffreddamento corrispondano ai dati per cui sono stati progettati e a quanto promesso!".

"Abbiamo mantenuto una torre di raffreddamento Marley da quando è stata installata nel 1984. È stata una grande attrezzatura!