Internal leakage in heat exchanger
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How to determine internal leakage: ammonia-rich gas in the tube layer, liquid ammonia in the shell layer
It’s difficult to determine this; it’s hard to detect liquid ammonia leaking into an ammonia-rich gas, but on the other hand, it can be determined through mass analysis of the liquid ammonia. If the leakage is even greater, it can be determined through material balance.
This is indeed difficult; one can only make a judgment by comparing past operation data
1. Pressure from the higher of the two media leaks to the lower one. 2. In the event of an internal leak, only component analysis can be used for diagnosis at low flow rates. 3. If the quantity is large, both temperature and pressure will experience significant changes, which will have an impact on both the heat exchanger itself as well as the processes before and after it!
When liquid ammonia leaks into gaseous ammonia, the liquid ammonia level drops and becomes difficult to detect, resulting in an imbalance between the two forms of ammonia