Gas-Based Deluge System Testing Apparatus
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Solution Overview
Problem
Conventional water deluge system testing methods, particularly in offshore oil and gas installations, are inconvenient and costly due to the need for frequent wet tests, which can cause corrosion and disrupt operations, and may not be necessary for systems in good condition.
Innovation Solution
A method and apparatus using a gas source and fluid sensors to perform a gas test, measuring flow rate and pressure during a short test period, allowing for the derivation of deluge system condition without the need for frequent wet tests, by comparing data sets over time to detect changes such as corrosion or blockages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wet tests are performed frequently to ensure deluge system functionality, then system reliability is improved, but operational disruption and corrosion increase
Solution Approach 1:
The patent replaces water-based wet testing with gas-based dry testing. Gas flows through the deluge system pipes and nozzles to simulate flow conditions without the corrosive effects of water, particularly on offshore installations. The gas test uses pressure sensors and flow analysis software to detect blockages and restrictions, providing reliability assessment without the harmful effects of frequent wet tests.
2Measurement precision
If wet tests are performed to detect blocked nozzles, then measurement accuracy is improved, but loss of time and operational disruption increase
Solution Approach 1:
The patent substitutes water-based flow measurement with gas-based flow measurement using pressure sensors and computational fluid dynamics software. The system models expected gas flow patterns and compares them with actual measurements to detect nozzle blockages. This method provides accurate detection without the time-consuming setup and cleanup required for wet tests, and without disrupting operations as severely.
Solution Approach 2:
The patent creates a virtual model of the deluge system using pipe network fluid flow analysis software. The software model replicates the physical system's behavior under gas flow conditions, allowing operators to compare predicted versus actual flow patterns to detect blockages. This copying approach enables accurate measurement without physical water discharge.
3Productivity
If gas tests are used instead of wet tests, then operational disruption is reduced, but measurement precision may be affected
Solution Approach 1:
The patent changes the physical parameter of the test fluid from liquid (water) to gas (inert gas). Gas flows more easily through the system and is less likely to cause corrosion or operational disruption. The system compensates for differences in gas versus water flow characteristics by using computational fluid dynamics modeling that accounts for gas properties, maintaining measurement precision while improving operational continuity.
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 the frequency of wet tests, minimizing disruption, corrosion, and operational costs while maintaining the integrity of the deluge system by using gas tests to assess conditions and detect changes without exposing personnel to water.
Implementation Method 1
activating the gas source to cause gas to flow through the deluge system during a gas test period
Implementation Method 2
measuring, using the plurality of sensors, at least one fluid parameter during the gas test period to provide a gas test data set
Implementation Method 3
measuring flow rate and pressure during a short test period
Data Source
AI summary
The invention provides a method and apparatus for of performing a test on a deluge system. The method comprises providing a gas source in fluid communication with a deluge system. A plurality of fluid sensors is installed at a plurality of locations (e.g. nozzles) in the deluge system. The gas source is activated to cause gas to flow through the deluge system during a gas test period, and using the plurality of sensors, at least one fluid parameter during the gas test period is measured to provide a gas test data set. The first gas test data set is stored, transmitted and/or processed to derive information about the condition of the deluge system.