Selection of loading pump
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This post was last edited by hnan on 2015-10-13 at 13:08. For docks with multiple mooring points, is it better to use variable-frequency motors for the gasoline loading pumps?
““A dock with multiple mooring points” sounds rather awkward. The poster is asking about docks that need to accommodate ships of various tonnages – there are large ships as well as small ones, and the flow rates differ. It’s best to use variable-frequency pumps for loading, but they are more expensive. Alternatively, when selecting pumps, it’s necessary to take into account the volume of traffic at the dock; several smaller pumps can be used, with one pump activated when the flow rate is low and two pumps when the flow rate is higher, and so on.
Is the distance difference between the berths significant? What is the distance between the loading pump and the berth? If the deviation between the positions of the berths has little impact on the overall pipeline leading to the loading pump, there is no need for frequency conversion. Conversely, it can be considered
Multiple-point mooring actually means there is only one vessel with no fixed dock, so in strong winds and waves, the hull and the flexible pipes are prone to breaking apart.
First, determine the ship’s efficiency; decide on the size of the pumps to be used. Generally, for pumps of the same type, one pump is used in operation while another serves as a backup. It is recommended to use variable frequency drives for small and medium-sized pumps, with one pump of the same type being sufficient. During loading, when it is almost full, stop the main pump; finally, a variable-frequency pump can be used.
I agree with you; the appropriate pump combination should be chosen based on the loading efficiency. Since the flow rate is low at the beginning and end of loading, it is more suitable to use variable frequency control. Additionally, the piping for the pump can also consider cross-line connection to enable flow regulation. Does the poster have any requirements regarding the quantity to be shipped?
Where in China can I find such berths?