Evaporative Cooling Tower Design

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.

Evaporative cooling tower design.

0 0714 lb ft3 air specific volume. They extract heat to the atmosphere through evaporative cooling. 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. 46 3774 btu lb dry air download the example file exe1 1 zip this file covers the examples of 1 1 through 1 4.

14 3309 ft3 lb dry air air enthalpy. Design considerations of cooling tower. Evaporative cooling differs from typical air conditioning systems which use vapor compression or absorption refrigeration cycles. 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.

In hot dry climates evaporative cooling towers will cool outdoor air and circulate it to a space or building. Cooling towers work on the principle of heat rejection. Evaporative cooling uses the fact that water will absorb a relatively large amount of heat in order to evaporate. Energy design resources e news april 2010.

When evaporative cooling is used with supplemental dx cooling it can reduce the dx cooling required. Moreover since they use 100 outside air for cooling the right evaporative cooling system can improve indoor air quality while reducing overall operating cost and energy consumption content source. They are the most economical approach to cool large amounts of water. 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 towers typically cool water to approximately 85 f but may cool as low as 65 f. For most industrial manufacturing electric power generation and even air conditioning needs cooling towers are a critical element of the design. Cooling towers may either use the evaporation of water to remove process heat and cool the working fluid to near the wet bulb air temperature or in the case of closed circuit dry cooling towers rely solely on air to cool the working fluid to near. Cooling tower thermal design manual air density.

The towers themselves are enclosed steady flow devices for cooling water by evaporation through direct contact with air. 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. 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.