超大型高位集水冷却塔的三维数值模拟研究

高位集水冷却塔具有高效、节能、低噪等优势,在火、核电厂中具有较好的应用业绩。本文采用CFD数值模拟的手段,对某超大型高位集水冷却塔的热力特性以及空气动力特性进行了数值模拟研究。计算结果表明:集水装置的增加对冷却塔形成阻力,但其增加程度要明显小于雨区阻力的减小量;在相同条件下,与常规塔相比,高位集水冷却塔的通风量较大;高位集水冷却塔的冷却性能优于常规塔。

Numerical study on the performance of a natural draught cooling tower with cooled water collectors

Since the advantage of cooling tower with water collectors devices is obvious at high performance, energy conservation and low noise, this type of cooling tower has been widely used in fire and thermal power plant. This paper focuses on tower performance by CFD,while establishing thermal and aerodynamic characteristics of three dimensional numerical model about the tower. The numerical simulation results show that:(1) Although the cooled water-collectors increase flow resistance,but this increment is significantly less than the decrease of resistance of rain zone. (2) The ventilation quantity of the tower with cooled water collectors is larger than that of conventional tower in the same situation. (3) The cooling efficiency of the tower with cooled water collectors is superior to the conventional tower.