Two opinions of evaporative cooling failure were analyzed,and pulsating of evaporative cooling was the main cause.At last,some preventive measures were put forward.

• 针对汽化冷却循环不正常的两种观点逐一进行了分析,最后得出纵水管汽化冷却脉动是导致冷却循环不正常的原因,从而提出了相应措施。