Centrifugal Machine Fluid Indicator Validation
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Solution Overview
Problem
Process instruments used with centrifugal machines lack the ability to accurately convey their health status, leading to delayed detection of faults, which results in increased costs and downtime when issues arise.
Innovation Solution
A system that includes a lead and lag centrifugal machine configuration with a working fluid parameter indicator and controller, which performs an operational test by comparing process parameter measurements to a baseline, validating the sensitivity of instruments and detecting potential faults early.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If smart process instruments are used to convey health status, then information about instrument condition is provided to control device, but the information can be inaccurate and operators may not detect problems until much time has elapsed
Solution Approach 1:
The system uses feedback by continuously monitoring process parameters and comparing actual values against expected ranges. When parameters deviate from normal operation, the system generates alerts, creating a closed-loop feedback mechanism that validates instrument performance in real-time rather than relying on potentially inaccurate self-reported health status from smart instruments.
Solution Approach 2:
The patent introduces an intermediary validation layer between the smart process instruments and the control device. This intermediary system independently monitors process parameters and verifies instrument performance, acting as a mediator that cross-checks the accuracy of health status information before it reaches operators, thereby resolving the reliability issue.
2Reliability
If operational tests are performed to validate instrument sensitivity, then early detection of faulty instruments is achieved, but plant shutdown may be required for maintenance
Solution Approach 1:
The system performs preliminary validation of instrument sensitivity by continuously comparing process parameters against predetermined ranges during normal operation. This preliminary action detects potential faults before they cause complete instrument failure, allowing for planned maintenance during non-critical periods rather than emergency shutdowns, thus maintaining plant productivity while ensuring reliability.
Solution Approach 2:
The patent implements dynamic monitoring that adjusts validation thresholds and alert levels based on changing operating conditions. The system can dynamically modify test parameters and maintenance scheduling based on real-time instrument performance, allowing maintenance to be performed during low-utilization periods rather than requiring fixed shutdowns, thereby balancing reliability validation with operational continuity.
Data Source
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Figure 3A~3C
AI summary
Disclosed herein is an approach that validates the sensitivity of a working fluid parameter indicator (181) in a system (100) using centrifugal machines (105 and 110). In one aspect, a lead centrifugal machine (105) and a lag centrifugal machine (110) supply a working fluid to a distribution conduit (173). A working fluid parameter indicator (181) measures a process parameter associated with the working fluid supplied to the distribution conduit (173) by the lead centrifugal machine (105) and the lag centrifugal machine (110). A controller (190) validates the sensitivity of the working fluid parameter indicator (181) to measure the process parameter associated with the working fluid as a function of operation of the lag centrifugal machine (110) relative to the lead centrifugal machine (105) during an operational test performed on the centrifugal machines (105 and 110).