Liquid ammonia unloading flow rate
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For the unloading of liquid ammonia, an ammonia compressor with a flow rate of 3.0 m3/min is used. Based on a liquid ammonia flow velocity of 0.8–1.5 m/s, the pipe diameter must be at least 200 mm. I would like to know what the maximum possible liquid ammonia flow velocity can be Is a 200mm diameter pipe too large for unloading, considering it’s only a 50m3 tank? Also, it should be correct to calculate it based on the compressor’s flow rate, right?
One should first use a liquid ammonia flow rate of 0.8–1.5 m/s to calculate the maximum flow rate, and then determine the capacity of the ammonia compressor accordingly (with a 10% margin added). As for the pipe diameter, it should also be calculated based on a liquid ammonia flow rate of 0.8–1.5 m/s; to be honest, a pipe diameter of 200 mm is a bit too large – DN100 is sufficient
It’s fine to have a smaller diameter and higher flow rate for short distances, but for long distances, the flow rate must be strictly controlled