Chapter36, Cooling Towers, has more information on closed-circuit towers, capacity control( including variable-frequency drives), critical speeds, biological control, wet/ dry towers, plume, and cold-weather operation.

• 第三十六章，冷却塔，更多关于封闭循环塔、能控制（括变频驱动）临界速度、物控制、/干塔、气（污染）冷季运行的信息。