Fire Training Chamber Venting for Safe Flashover Simulation
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Solution Overview
Problem
Existing fire training systems using gaseous gas cannot safely simulate a 'flashover' scenario due to the risk of uncontrolled combustion of liquid gas accumulating at the bottom of the fire chamber, posing an accidental and uncontrollable fire situation.
Innovation Solution
A fire training system with a fire unit connected to a gas supply unit, featuring a first outlet for gaseous gas and a second outlet for liquid gas, where the second outlet is positioned to allow liquid gas to flow into the fire chamber floor within a predetermined radius, equipped with openings to disperse the gas outside and sensors to monitor and control the combustion process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If liquid gas is used to simulate fire with higher energy density, then larger flames and flashover scenarios can be simulated, but liquid gas accumulates at the bottom of the fire chamber leading to uncontrolled combustion
Solution Approach 1:
The harmful accumulation of liquid gas at the bottom of the fire chamber is extracted and removed through openings in the floor. The system actively removes the dangerous substance (liquid gas) that would otherwise cause uncontrolled combustion, separating the useful function (fire simulation) from the harmful effect (gas accumulation).
Solution Approach 2:
The openings in the floor act as intermediaries between the liquid gas and the external environment. Instead of allowing direct accumulation and potential explosion within the chamber, the openings provide a controlled pathway for the liquid gas to escape, mediating between the high-energy fire simulation need and safety requirements.
2Ease of operation
If gaseous gas is used in the fire unit, then the system is simple to operate, but flashover scenarios cannot be simulated
Solution Approach 1:
The fire unit is designed with dual functionality, capable of handling both gaseous gas and liquid gas through separate outlets. This multi-functional design allows the same basic fire unit structure to simulate different fire scenarios (standard fires with gaseous gas, flashover with liquid gas) while maintaining operational simplicity through standardized handling procedures for each gas type.
3Reliability
If openings are provided in the floor wall to disperse liquid gas, then unburned gas can escape safely, but gas dispersion control becomes more complex
Solution Approach 1:
The floor wall is segmented with multiple openings distributed across its surface rather than having a single large opening or completely sealed structure. This segmentation allows liquid gas to escape through multiple pathways, improving safety by preventing localized accumulation while distributing the dispersion process across several controlled locations, reducing overall system complexity.
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
The system safely simulates 'flashover' by ensuring minimal risk of unburned liquid gas igniting inside the chamber, enhancing firefighter safety through passive and active monitoring and control mechanisms.
Implementation Method 1
liquid gas has a higher density than air and/or gaseous gas
Implementation Method 2
the liquid gas can flow out of the fire chamber on its own thanks to the at least one opening
Implementation Method 3
the fire chamber can be equipped with a sensor for detecting liquid gas or gaseous gas
Implementation Method 4
the gas flowing out of the first outlet is ignited, whereupon a fire starts in the fire chamber
Data Source
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AI summary
The invention relates to a fire training facility (2) with a fire chamber (4) and a fire unit (6) arranged in the fire chamber (4), which is connectable to a gas supply unit (8) and has a first outlet (10) for gaseous gas from the gas supply unit (8), wherein the fire unit (6) has a second outlet (12) for liquid gas from the gas supply unit (8) and the fire chamber (4) has at least one opening (14) in a bottom wall (16) of the fire chamber (4) within a predetermined radius (R1) around the fire unit (6). A gas sensor on or under the bottom wall (16) is able to detect unburned liquid gas or the corresponding type of gas flowing through the opening (14) in the bottom wall (16) of the fire chamber (4).