What does the “water vapor circulation ratio” of an external heat exchanger mean?

2011-01-19View Original

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What does the “water vapor circulation ratio” of an external heat exchanger mean?

Reply #22011-01-21

The ratio of steam generation to the water circulation rate in the downcomer of the drum, if too high, can cause overheating and damage to the evaporation heat exchange tube bundle. Personal opinion, for reference only!

Reply #32011-02-13

Water entering the tube bundle results in a mixture of steam and water; the amount of water flowing out is equal to the amount of gas returning from the upper tube bundle. This can be simply measured by dividing the amount of steam generated by the drum by the amount of water entering the tube bundle (in reality, the amount of steam emitted by the drum is less than the amount of steam that comes out of the tube bundle).

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