Inert Gas Fire Suppression System Pressure Control
Solution Overview
Problem
Current fire suppression systems face challenges in efficiently delivering and controlling the discharge of liquid and gaseous suppressants, particularly in high-pressure environments, which can lead to inefficient use of resources and potential damage to equipment due to high storage pressures and the need for specialized vessels.
Innovation Solution
A fire suppression system featuring a gas source with multiple cylinders coupled in parallel, a controller for pressure regulation, and a network of valves and pressure reducing devices to manage the flow of inert gases like argon and nitrogen, allowing for controlled discharge of liquid suppressants through a series of pressure-reducing devices and burst disks, enabling flexible and efficient delivery of suppressants to various endpoints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If high-pressure storage (200-300 bar) is used for inert gas suppressants, then the suppressant can be stored effectively, but specialized high-pressure vessels are required which increase device complexity and cost
Solution Approach 1:
The system divides the suppressant delivery into separate functional components: ordinary pressure vessels for storage, and separate propellant gas cylinders for pressurization. This segmentation allows each component to be optimized independently, eliminating the need for complex high-pressure suppressant vessels.
Solution Approach 2:
A propellant gas (inert gas at high pressure) is introduced as an intermediary substance to transfer energy to the liquid suppressant. The propellant gas acts as a mediator that propels the suppressant from ordinary vessels through pressure differentials, avoiding direct high-pressure storage of the suppressant itself.
2Device complexity
If liquid suppressants are stored in ordinary pressure vessels, then device complexity is reduced, but precise control over discharge pressure becomes more difficult
Solution Approach 1:
The system incorporates pressure sensors and control valves that monitor and adjust the propellant gas pressure in real-time. This feedback mechanism ensures precise control over the pressure applied to the liquid suppressant, maintaining consistent discharge pressure despite variations in storage conditions.
Solution Approach 2:
The system controls discharge pressure by dynamically adjusting parameters of the propellant gas (pressure, flow rate) rather than relying on fixed vessel pressure. Control valves modulate the propellant gas flow to maintain precise pressure control during suppressant delivery.
3Manufacturing precision
If multiple pressure reducing devices are used in series, then discharge pressure control is improved, but device complexity increases
Solution Approach 1:
The system uses dynamically controllable electronic pressure control valves instead of fixed mechanical pressure reducing devices. These valves can be adjusted in real-time to achieve precise pressure control with fewer components, replacing multiple static pressure reduction stages with adaptive single-stage control.
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 system allows for efficient and controlled delivery of suppressants, reducing the need for high-pressure vessels and enabling flexible packaging, while ensuring effective suppression in various applications by maintaining low storage pressures and precise control over discharge pressures.
Implementation Method 1
At least one first pressure reducing device and at least one second pressure reducing device are in series along the propellant flowpath between the gas source and the at least one vessel
Implementation Method 2
The burst disk is configured to fail at a predetermined pressure upon receipt of pressurized gas from the gas source along the flowpath, thereby propelling the liquid suppressant through the flowpath
Data Source
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AI summary
A fire suppression system (20) has a gas source (22) and at least one vessel (60) containing a liquid suppressant (62). A respective flowpath extends from each said vessel to one or more associated first outlets (73). A respective propellant flowpath extends from the gas source to each said vessel and is coupled to a headspace (70) of the vessel. At least one first pressure reducing device (30) and at least one second pressure reducing device (44) are in series along the propellant flowpath between the gas source and the at least one vessel.