逆流冷却塔的热工性能评定及预测

作者通过对运行塔测试数据的观察和理论分析,认为除气水比外,进水温度和湿球温度的影响不容忽视,并归纳为水的温态比的影响,从而建立塔的热工特性方程。由此可求得运行塔在设计工况下所具有的交换数,与该工况所需交换数相比较即可评定塔的热工性能。也可用来预测各运行工况下塔的排热量。由于仅考虑气水比影响的塔(填料)热工特性方程的求解值偏大,作者建议在试验塔测试台上整理热工特性方程时,应考虑水温态比的影响,使藉此设计的塔具有足够的填料容积,保证有良好的热工性能。

THE ASSESSING AND PREDICTING OF THERMODYNAMIC PERFORMANCE OF COUNTERFLOW COOLING TOWER

By means of observing the testing datas of running tower and analyzing in theory,the author considers that,as well as the ratio of air to water,the influence of both inlet water temperature and wet bulb temperature should not be neglected,and thus resulting in the influence of the ratio of tem- perature state of water.From which the thermodynamic performance equation of tower could be estab- Ushod;and then the number of transfer units which tower owns in designing performance could be de- termined.As contrasted with the number of transfer units which the design performance requires,we could assess the actual tower thermodynamic performance,and also calculate the tower heat egression for different running performances.The equation of tower thermodynamic performance,evaluation much higher(partially higher),so the author suggests that the influence of the ratio of temperature state of water should be taken into consideration when the thermodynamic performance equations are collated at the measuring platform of trial towers.The tower,designed as thus,will be ensured to keep sufficient filling volume and a favourable thermodynamic performance as well.