Cyclic hydrogen flow rate
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Is the circulating hydrogen at the compressor outlet of the hydrocracking cycle unit containing liquid? Is your circulating hydrogen flow meter accurate, and what type of flow meter is it? Should the pressure lead of the flow meter be led upward or downward?
On a flow orifice plate, if there is liquid carried along with the flow, the flow rate will be higher; the flow rate also increases when the temperature is high. It seems that both density and temperature have an impact on the calculations performed by the gauge
45° inclined upward, orifice plate differential pressure flow meter.
No liquid belt, pulled upward, with errors
In my opinion, the circulating hydrogen does not contain liquid; if it did, the compressor would have already suffered damage due to cylinder collision. It is likely that there are many light components in the circulating hydrogen, which causes deviations in the flow meter readings； It is best to install the flow meter above to reduce liquid carryover
There is no liquid at the outlet; it’s a top-fed system, and orifice plate flow meters are used. Generally, there is liquid at the inlet. If there were liquid at the outlet, the compressor would have broken down long ago
But it seems that the circulating hydrogen at the outlet of our cracking cycle machine contains liquid; our flow meter is installed in a downward orientation, and the flow measurement becomes inaccurate due to the presence of liquid. If there is no liquid present, then why must the flow meter be installed in an upward orientation?
Old post with a new question: The original poster has solved this problem. In our case as well, there is liquid present at the outlet of the hydrogen circulation pump; the flow meter at the outlet tends to malfunction in winter. There is also liquid in the pressure gauge tubing connected to the exhaust port of the hydrogen circulation pump. What could be the reasons for this?
Whether circulating hydrogen contains liquid or not is a relative concept! It’s impossible to have no liquid at all, so it’s correct to orient the pressure tap of the flow meter at 45° upward! The liquid volume needs to be controlled by the temperature of the cold high-pressure section; a lower temperature naturally results in less liquid volume, but an excessively low temperature leads to increased energy consumption!
Centrifuge? Isn’t it deep-cooled before entering the compressor? If the density of the circulating gas increases, the flow rate reading will also increase