Change structure of cooling towers with deletion cellulose pads (packing) and air blower and use vacuum mechanism
Abstract. Topics studied in this project are to change the structure of wet cooling towers that are used in refrigerating industry. Base of working in all existing wet cooling is on upgrading heat exchange between air and cooling liquid and increasing surface evaporation and more contact between water and air. Generally, in cooling towers heated water by pipes is moved to the top of the tower. In this route water has heat exchange ventilator with outgoing air, is cooled and collected in bottom of the tower. In order to increase the contact area between water and air in the course of water falling, special packing that cellulose pad is the most common type of it is used. Cooling towers available have disadvantages such as: precipitation, corrosion of internal components, the growth of algae and biological bacteria, occupy too much space, too much noise, do not use in damp, dust in the system, not using towers together, reducing cooling efficiency over time and etc. Now if circumstances arise that tower can work in a closed cycle, in a small space, away from light, with more efficiency, longer life and different structure is ideal. Now the present project attempt is by reducing the pressure on the water surface in a closed container, increase water evaporation rate. And by using an evaporation tower, Shower, electrical controllers, alternative mechanisms and exhaust valves saturated steam, to achieve substantial cold in absence of cellulose pads and blower pump and greatly reduce water temperature Also flaws in the cooling towers such as reduction in cooling efficiency due to precipitation and decrease in performance of cellulose pads, failure to use several cooling towers next to each other, the entry of dust into the system, a lot of space, algae and biological bacteria , a lot of noise, water falling from the towers and on the ground in the surrounding space, high maintenance costs to be eliminated or minimized. The empirical research shows that due to structure designed with the placement of 0.04 atmospheric pressure on the surface of the water. In terms of sustainability, water outlet temperature is in range of 24 ° C and this means an increase in efficiency of about 30 percent compared to existing models.
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