Pressure Exchanger Flow Control for Abrasive Fluid Pressurization
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Solution Overview
Problem
Conventional systems using pumps to handle fluids with solid particles and high viscosity suffer from damage, reduced efficiency, and increased maintenance due to abrasion and erosion.
Innovation Solution
The use of a pressure exchanger system that exchanges pressure between a high-pressure, particle-free fluid and a low-pressure, particle-laden fluid, reducing the need for direct pumping of abrasive fluids and minimizing wear on components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If pumps are used to increase pressure of particle-laden fluids, then the fluid pressure is increased, but the pump components suffer from abrasion and erosion leading to reduced efficiency and increased maintenance
Solution Approach 1:
A pressure exchanger is introduced as an intermediary device between the particle-laden fluid and the pump. The pump only handles clean pressurized water, while the pressure exchanger transfers this pressure to the particle-laden fluid through hydraulic coupling, preventing direct contact between abrasive particles and pump components.
Solution Approach 2:
The harmful abrasive particles are extracted from the pump's working environment. The pump exclusively handles clean water free of particles, while the particle-laden fluid is pressurized indirectly through the pressure exchanger, removing the source of abrasion and erosion from the pumping system.
2Duration of action of stationary object
If specialized pumps with hardened materials are used to handle abrasive fluids, then the pump durability is improved, but the system complexity and cost increase
Solution Approach 1:
The pressure exchanger serves as a mediator that simplifies the pump design. Instead of requiring complex hardened materials and specialized constructions, a standard pump can be used to pressurize clean water, and the pressure exchanger handles the abrasive fluid separately, reducing overall system complexity.
3Stress or pressure
If multiple pumps are used in series to achieve desired pressure, then the target pressure is reached, but the system energy consumption and complexity increase
Solution Approach 1:
The pressure exchanger acts as an efficient intermediary that transfers pressure from clean water to particle-laden fluid with minimal energy loss. This single-stage pressure transfer mechanism is more energy-efficient than multiple pump stages, as it avoids repeated pressurization and reduces cumulative energy consumption.
Solution Approach 2:
The functions of multiple pumps are merged into a single pump plus pressure exchanger combination. The pump pressurizes clean water, and the pressure exchanger combines this pressurized water with the particle-laden fluid to achieve the desired output pressure, reducing the number of moving parts and energy requirements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces wear on components, decreases maintenance, increases system efficiency, and extends the life of system components, while also reducing energy consumption and increasing yield in applications like desalination and fracking.
Implementation Method 1
The PX is configured to exchange pressure between the first fluid and the second fluid
Data Source
AI summary
A system includes a pressure exchanger (PX) including a housing and configured to exchange pressure between a first fluid and a second fluid. The system further includes a bearing valve fluidly coupled to the housing of the PX and configured to provide the first fluid to the housing. The system further includes a controller to cause a first adjustment of a first flowrate of the first fluid into the PX based on a target flowrate of first fluid into the PX and the first flowrate. The controller is further to cause a second adjustment of a second flowrate of the second fluid into the PX based on the first flowrate and the second flowrate.