Performance Analysis And Optimum Design Of Light Natural Ventilation Wet Cooling Tower

As an effective cooling of equipment in industrial production, natural draft counter-flow wet cooling tower is widely used in thermal system of circulating water cooling. Compared with the traditional cement cooling tower, light-weight structural natural draft cooling tower is mainly made of glass fiber reinforced plastic and steel material, which can save materials, reduces the labor cost and construction period; moreover, easier installation with good frost resistance can also benefit the whole system. The development of lightweight structural natural draft cooling tower will provide new options for cooling system design.In this paper, aiming at lightweight natural draft cooling towers, the resistance difference between lightweight tower and traditional cooling tower is analysed, and the relative resistance coefficient is obtained:X column at a relative drag coefficient is 0.370, bending at a relative drag coefficient is 0.991, the tower wall relative drag coefficient is 1.380. In order to set up the heat and mass transfer mathematical model,the one-dimensional calculation of the cooling tower is achieved. To verify the model, the compartion between the data calculated by the model and the data come from exist tower are done, the result shows the magin of error is 4.37%, which can fulfill the requirements of industrial design, so it verified the accuracy of the analysis under the other conditions. By using the mathematical model established, We studied the varied trend of cooling water temperature and circulation under various operating conditions. The results show that the dry bulb temperature, wet bulb temperature, the cycle of water and area of water drenching for cooling tower water temperature have the greater impact on the water cycle. The model also studied the influence of parameters and the tower tower costs, result shows that the increasing of the water spray area singly affect the tower cost most, the varity of the height of affect the cost least. Colligating the thermal performance and economic factors of the tower, the model can provide the basis for actual engineering optimization, In a practical engineering tower type, for example, the three areas of water spray cooling tower were optimized selection for choosing the lowest cost cooling tower. After the optimum solution, compared the total cost between the light water spray cooling tower and the cement water tower, the results show that the new cooling tower can save about 30% of the total cost of about 7.2 million yuan,;moreover, it also can effectively save the cost of the the production cycle and labor costs; In addition, for the region’s winter freeze questions, the installation of raised inlet shutters outside, the installation of the windscreen panel in the tower at the district water distribution, and installation of the inlet outer galvanized wire to form an ice wall four kinds of antifreeze proposed measures.