Natural Draft Cooling Tower
The tower operates on the stack effect which causes the hot air in the tower to rise natural draft.
Natural draft cooling tower. The natural draft cooling towers sometimes called iterson are used in the same way as the forced draft cooling towers for removing low potential heat generated in the production process. Natural draft cooling towers. The necessary stack can be designed in various ways. Advantages of mechanical draft cooling towers over natural draft cooling towers.
An indirect cooling method using air is known as a heller system or heller arrangement that uses a fluid cooler or natural draft cooling tower as shown schematically in fig. A natural draft cooling tower can therefore be described as a heat rejection device that naturally rejects heat into the atmosphere by cooling a water stream to low temperatures. Cool and humid climates low wet bulb temperature and high relative humidity heavy winter loads working principle of natural draft cooling towers. This moist air buoyancy produces an upwards current of air through the tower.
Propeller fans or centrifugal fans may be used. With respect to drawing air through the tower there are three types of cooling towers. Warm moist air naturally rises due to the density differential compared to the dry cooler outside air. The cooling principle is the same atmospheric cooling with wet technology but the fan unit is missing here since heat is removed from the cooling.
15 7 the heller system uses an indirect cooling configuration where the vapor is condensed in a direct contact condenser as described above in section 15 3 2 1 and the condensate working fluid is pumped through an. Natural draft utilizes buoyancy via a tall chimney. As the name indicates air is circulated inside the tower mechanically instead of natural circulation. Warm moist air is less dense than drier air at the same pressure.
The mechanical draft cooling towers are very much similar to that of the natural draft cooling towers. Our natural draft wet cooling towers have been used to cool water primarily in energy production for almost 100 year. The hot water that is to be cooled in the cooling tower is pumped to the top of the cooling tower at the hot water inlet.
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