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发表于 2012-12-26 22:54:24
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是可以的,没问题的,ISPE 水系统和蒸汽系统指南 VOL 4 中间的第八章就有这样的图,应该是符合要求的。
Figure 8-8 Hot Storage, Cool and Reheat
图8-8 热储存、冷却和再加热
This system is most advantageous when the water is generated hot, tight microbial control is required, and there is little time for sanitization. It provides excellent microbial control and is easily sanitized. It requires less capital than point of use exchangers, if there are multiple low temperature use points. Hot water from the storage tank is cooled through the first heat exchanger, circulated to the use points, and then reheated in a second exchanger before returning to the storage tank. Sanitation of the loop is accomplished by turning off the cooling medium on a periodic basis. Water consumption is minimized since no flushing is required. The major disadvantage of this configuration is it's high energy consumption, since it cools and reheats the circulating water regardless of whether it is drawn out of the loop.
当水加热,需要严密的微生物防治,且只有一点时间用来消毒的话,用这个系统是最方便的。它提供了很好的微生物防治且十分便于消毒。如果存在多种低温使用点的话,相对于使用交换器的点而言它只需要很少的资金投入。储存罐出来的热水经过第一个热交换器冷却,流至使用点,并在回到储存罐前在第二个交换器内再度加热。定期关闭冷却介质即可对回路进行消毒。因为无须冲冲洗,所以耗水量也减少了。此种配置最主要的缺点是它的高能耗,这是因为不管是否从回路中取水,循环水都会冷却并需要再加热。
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