Methods to increase export pressure
Thread Content
Currently, fluids are pumped with an outlet pressure of around 5 bar; after passing through the heat exchanger, they enter a gravity-fed pipeline, where the outlet pressure is close to atmospheric pressure. Are there any ways to increase the outlet pressure?
The outlet pressure is determined by the pressure of the equipment at the pipe outlet; isn’t it okay to use a pump?
Factors affecting the pump’s outlet pressure: delivery distance, delivery height, pipeline resistance (fluid viscosity + pipeline bending resistance), and outlet backpressure.
What about the exit velocity? If that is also very low, it becomes difficult to handle the situation; if the velocity head is acceptable, then ways can be found to convert that velocity head into pressure head!
The question isn’t very clear. Do you want to increase the pressure at the pump outlet or at the outlet of the gravity-fed pipeline downstream? The simplest approach is to install a globe valve at the outlet; by reducing the flow rate, the pump’s head pressure can be increased (refer to the pump’s performance curve). Of course, care must be taken to ensure that the flow rate does not drop below the minimum value.
(1) I disagree with the opinion above. Installing a ball valve can reduce flow rate and increase head pressure, but when the ball valve is used for adjustment, resistance increases, and this does not necessarily lead to an increase in the outlet pressure after the heat exchanger. Additionally, the regulation of flow rate should be determined by the process requirements, and it cannot be changed arbitrarily； (2) The existing piping has been determined; the low pressure at the outlet of the piping indicates that the pump selected has an insufficient head. Is it feasible to use a different pump?
Can the flow rate meet the requirements? What’s the point of increasing the outlet pressure?