Parallel Pump Pressure Head Equalization Control
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Solution Overview
Problem
In modern pump systems, minor variations due to manufacturing tolerances can lead to dead heading when multiple pumps are used in parallel, potentially resulting in pump failure.
Innovation Solution
A control system is implemented to measure and equalize the pressure heads of multiple pumps arranged in parallel, using proportional and integral controllers with lag-lead filters to ensure synchronized operation and prevent dead heading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple pumps are used in parallel to increase flow rate, then productivity is improved, but manufacturing tolerances cause pressure head variations leading to dead heading and pump failure
Solution Approach 1:
The control system continuously measures the pressure head at each pump outlet and uses this feedback to adjust pump operation. The controller compares measured pressure heads and modifies individual pump demands to equalize pressure heads, preventing dead heading while maintaining parallel operation for increased flow rate
Solution Approach 2:
The system dynamically changes operational parameters (pressure head targets, flow rate demands) for each pump based on real-time measurements. By adjusting the demand parameters of individual pumps to achieve equal pressure heads, the system compensates for manufacturing variations and maintains reliable operation
2Reliability
If pumps are controlled to achieve equal pressure heads to prevent dead heading, then reliability is improved, but device complexity increases due to control system requirements
Solution Approach 1:
The control system automatically monitors and adjusts pump operations without external intervention. The controller self-regulates by comparing pressure head measurements and autonomously modifying pump demands to maintain equal pressure heads, reducing the need for complex external control mechanisms
Solution Approach 2:
The control system performs multiple functions: measuring pressure heads, comparing values, calculating required adjustments, and controlling multiple pumps. This multi-functional approach consolidates what could be multiple separate control mechanisms into a single integrated system, reducing overall complexity
Data Source
AI summary
A pump system is disclosed including a first pump having a first inlet and a first outlet, and a second pump having a second inlet and a second outlet. The second pump is arranged in parallel with the first pump, and the first inlet and the second inlet are for fluidically coupling to one or more fluid reservoirs. A control system is coupled to the first pump and the second pump for controlling the operation of the first pump and the second pump simultaneously. The control system is configured to measure a value of a first pressure head at the first outlet, measure a value of a second pressure head at the second outlet, control the first pump to achieve a required output and control the second pump by providing a demand for the second pump to achieve a measured value of the second pressure head which equals the measured value of the first pressure head.