How can a constant flow rate be ensured when transporting water solely based on the difference in liquid levels? !
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Device A has a high liquid level, and water is transferred to Device B through the difference in liquid levels. Device A is significantly higher than Device B, and the goal is to completely drain the water inside Device A. How can a constant flow rate be ensured when transporting water solely based on the difference in liquid levels? !
This can be controlled, but it requires a drivable power source.
1. Control valves should be installed on the pipelines connected to Device A, using flow control; these control valves require a power source to operate. 2. For a constant flow rate, it is necessary that the control valve not be too large, otherwise when the liquid level in Device A drops to near 0, the flow rate cannot remain constant
Okay, thank you. Is the driving power source used to control the valve opening?
It refers to the driving of the fluid; it would be best to send a schematic diagram of the site or an image. Indicate the pressure difference and the height difference in liquid level between the two tanks.
Maintaining a constant flow rate requires a constant pipe resistance, which is provided by the static head pressure. In this case, the static head pressure gradually decreases, so it is impossible for the flow rate to remain constant. The pressure relief valve for tank A can be set to be controlled by the liquid level difference LdT between the two tanks; a drop in liquid level is compensated for by the gas phase, thereby maintaining a constant differential pressure at both ends of the pipeline. As for flow rate, a flow control orifice plate will do the trick.