Pressure Slope Analysis for Leak Detection in High-Pressure Systems
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Solution Overview
Problem
Pressure system leak detection in high-pressure environments is challenging due to the difficulty in distinguishing between pressure changes caused by temperature fluctuations and actual leaks, leading to prolonged and costly testing processes.
Innovation Solution
A method utilizing a processor to analyze pressure data from a pressure sensor, determining the absolute value of pressure slope and absolute pressure change, and entering a passing state if within predetermined thresholds, to generate a passing indication after a stable period, thereby identifying leaks efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional pressure testing methods are used to ensure pressure system integrity, then measurement reliability is improved, but testing time increases significantly
Solution Approach 1:
The system performs preliminary pressure equalization by allowing heat transfer between the fluid and surrounding media before the actual leak detection test. This preliminary action stabilizes the temperature and pressure conditions, eliminating the need for prolonged testing periods while maintaining measurement reliability.
Solution Approach 2:
The method monitors changes in pressure parameters over time and uses the rate of pressure change (dp/dt) as a diagnostic indicator. By analyzing how pressure parameters evolve rather than relying on static pressure values alone, the system can quickly identify leaks without requiring extended testing durations.
2Measurement precision
If pressure testing is extended to account for temperature fluctuations, then measurement precision is improved, but productivity decreases
Solution Approach 1:
The system continuously monitors pressure changes and uses feedback from the rate of pressure change to determine when temperature equilibrium has been reached. This feedback mechanism allows the system to automatically adjust testing duration based on actual thermal conditions, improving measurement precision without unnecessarily extending test time and maintaining productivity.
Solution Approach 2:
The method transitions from static pressure measurement to dynamic pressure monitoring by measuring the rate of pressure change over time. This dynamic approach enables the system to distinguish between pressure changes caused by temperature fluctuations and those caused by leaks, improving measurement precision while reducing required testing time.
3Reliability
If multiple repeated tests are performed to ensure validity, then reliability is improved, but loss of time increases
Solution Approach 1:
The system replaces mechanical repetition of tests with a mathematical/differential approach by monitoring the rate of pressure change (dp/dt). This substitution allows the system to determine test validity through continuous analysis of pressure dynamics rather than requiring multiple repeated tests, thereby maintaining reliability while significantly reducing time consumption.
4Reliability
If pressure systems are tested frequently to detect leaks early, then reliability is improved, but cost increases due to vessel lease expenses
Solution Approach 1:
The system performs preliminary temperature equalization and uses the natural thermal environment to stabilize pressure conditions before conducting leak detection. This approach enables frequent, low-cost testing by eliminating the need for prolonged expensive vessel leases, thereby improving early leak detection capability while reducing testing costs.
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 method reduces the time and cost of pressure system testing by accurately distinguishing between temperature-induced pressure changes and leaks, allowing for early detection and remedial action, thus preventing catastrophic failures and environmental risks.
Implementation Method 1
receiving, by a processor, from the pressure sensor, pressure data of the pressure system
Implementation Method 2
determining, by the processor, an absolute value of a pressure slope with respect to time based on the pressure data
Data Source
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AI summary
A method for determining the presence of a leak in a pressure system. The method includes receiving pressure data of the pressure system after shut-in of the pressure system, determining a pressure slope based on the pressure data, entering a passing state in response to the slope being less than a predetermined slope threshold, exiting the passing state in response to the slope being greater than the predetermined slope threshold, and generating a passing indication as a result of remaining in the passing state for at least a predetermined time period.