The working principle of the cooling tower and classification

Working principle of the cooling tower cooling tower is the use of water and air contact, dispersed by evaporation in industry or a kind of waste heat generated in refrigeration and air conditioning equipment. Its working principle is: dry, Low enthalpy) The air after a fan twitch, since the ventilation network into the cooling tower; Saturated steam partial pressure of high temperature water molecules to flow in the low pressure air, hot and humid, High enthalpy) Water from the spray water system into the tower. When water droplets and air contact, on the one hand, due to the direct heat transfer of air and water, on the other hand because of the water vapor pressure difference between surface and air has the evaporation under the action of the pressure, to take away the quantity of heat of water evaporation heat transfer, so as to achieve the purpose of the cooling. In the working process of the circular counterflow cooling tower, for example: hot water through independent room pump with certain pressure through pipes, horizontal throat, curved pipes, center of circulation water pressure to the cooling tower water system, water by sowing holes on the pipe evenly spread on packing; Dry low Han value under the action of fan, air into the tower by into the wind at the bottom of the network, formed when hot water flows through the filler surface water film and air to heat, high humidity yoake value out of the hot air from the top, cooling water into the basin, the outlet pipe into the host. In general, into the tower air is dry, low wet bulb temperature of air, water and air obviously exists between the concentration of water molecules and the kinetic pressure difference, when the fan operation, under the action of static pressure inside the tower, the water molecules to evaporate in the air, to become water vapor molecules, the average kinetic energy of the rest of the water molecules will be reduced, thus make the temperature of the circulating water drop. Can be seen from the above analysis, the evaporation cooling and the temperature of the air ( Usually said the dry bulb temperature) Below or above the water temperature has nothing to do, as long as the water molecules can continuously evaporate into the air, the water temperature will be lower. But the evaporation of water into the air will not go on endlessly. When the unsaturated air contact with water, the water molecules to evaporate in the air, but when the air reaches saturation of the contact surface of water and water molecules evaporation not to go out, but in a state of dynamic balance. The evaporated water molecules number is equal to the return from the air with the number of water molecules in the water, water temperature remains constant. Thus it can be seen that, the air is dry contact with water evaporation, the easier it is for the water temperature is easy to reduce. < < br / > cooling tower categories: a, according to the ventilation way with natural ventilation cooling tower, mechanical ventilation cooling tower, mixed ventilation cooling tower. Second, according to the water and air contact points with dry wet cooling tower, dry cooling towers, wet cooling tower. 3, according to the hot water and air flow direction have counterflow cooling towers, cross flow ( Communication) Type cooling tower, the mixed flow cooling tower. Four, according to utility cent general air conditioning cooling towers, cooling towers for industrial use, high temperature type cooling tower. Five, according to the noise level is divided into common type cooling tower, low noise type cooling tower, ultra low noise type cooling tower, super mute type cooling tower. Sixth, other such as spray flow cooling tower, cooling tower fan, hyperbola cooling tower, etc.

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