Evaporative Cooling Tower Design

An evaporative cooler also swamp cooler swamp box desert cooler and wet air cooler is a device that cools air through the evaporation of water.

Evaporative cooling tower design.

Evaporating water at the top of a cooling tower creates a downdraft of cooler air that can then be circulated to a specific space or area. Cooling tower thermal design manual air density. A cooling tower is a heat rejection device that rejects waste heat to the atmosphere through the cooling of a water stream to a lower temperature. They extract heat to the atmosphere through evaporative cooling.

Design considerations of cooling tower. The required cooling tower design and size will be a function of following values. Evaporative cooling differs from typical air conditioning systems which use vapor compression or absorption refrigeration cycles. They are the most economical approach to cool large amounts of water.

For most industrial manufacturing electric power generation and even air conditioning needs cooling towers are a critical element of the design. The towers themselves are enclosed steady flow devices for cooling water by evaporation through direct contact with air. 0 0714 lb ft3 air specific volume. In hot dry climates evaporative cooling towers will cool outdoor air and circulate it to a space or building.

The efficiency of this device depends essentially on climatic conditions in particular the wet bulb temperature and the relative humidity of the ambient air. Evaporative cooling uses the fact that water will absorb a relatively large amount of heat in order to evaporate. Cooling towers work on the principle of heat rejection. An evaporative cooling tower provides cooling based on a design wet bulb temperature.

This is the 43 tower fan evaporative cooler from comfyhome that doubles as an energy efficient air conditioning source and a regular house fan that oscillates. Evaporative cooling towers typically cool water to approximately 85 f but may cool as low as 65 f. For new buildings design teams can demonstrate the cooling tower s contribution to indoor water reduction with makeup water meters conductivity controllers and overflow alarms and drift eliminators. Energy design resources e news april 2010.

An evaporative cooling tower system capable of achieving these goals has the potential to earn points toward energy optimization credit. 46 3774 btu lb dry air download the example file exe1 1 zip this file covers the examples of 1 1 through 1 4. When evaporative cooling is used with supplemental dx cooling it can reduce the dx cooling required.