What are the reasons for the high pressure difference at the inlet filter of the BOG compressor?
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When the LNG composition changes, the pressure difference changes significantly. So what is the reason? What are your expert opinions, everyone?
Under the same amount of cooling, the amount of liquefaction varies depending on the different components; this amount of liquefaction determines the change in pressure difference. Generally, if there are not significant changes in the components, the pressure difference will not be large. An increase in the flow rate of the feed gas leads to a noticeable change in the pressure difference
The last edit to this post was made by tanxjzm on 2018-8-23 at 13:15; when the BOG flow rate changes, the flow velocity also changes
Sometimes, the compressor’s gas delivery efficiency decreases, the volume of gas delivered drops, the clearance volume increases, and the sealing rings wear out excessively, all of which lead to an increase in the suction pressure. Or if the heat load in the machine chamber suddenly increases, the cooling capacity of the compressor becomes insufficient, resulting in an excessively high suction pressure.