Firefighter Air Replenishment Bypass for Reduced Pump Air Use
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Solution Overview
Problem
Firefighter air replenishment systems (FARS) require significant amounts of air for operation, which can be inefficient and occupy excessive space, especially when boosting air pressure from storage to operating pressure.
Innovation Solution
Implementing a FARS with a check valve and pressure regulator to bypass pumps when storage air meets or exceeds supply pressure, reducing drive air pressure to pumps, and optimizing pump configurations for lower volume ratios, thereby minimizing air usage and space requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a pump is used to boost air pressure from storage to operating pressure, then air can be delivered to fill stations, but significant amounts of air are consumed for drive pressure
Solution Approach 1:
The system dynamically switches between pump operation and direct pressure transfer based on real-time pressure conditions. When storage pressure exceeds operating pressure, the system automatically bypasses the pump and transfers air directly, eliminating unnecessary air consumption for drive pressure while maintaining air delivery capability.
Solution Approach 2:
The invention extracts the pump from the mandatory air delivery path by introducing a parallel bypass route. The bypass allows air to flow directly from storage to fill stations when pressure conditions permit, separating the pump function from the essential air delivery function and enabling system operation without pump-induced air consumption.
2Loss of substance
If pump volume ratio is reduced for lower air usage, then air consumption decreases, but pump size and complexity increase
Solution Approach 1:
The system employs dynamic pressure regulation and bypass control mechanisms that adapt pump operation to actual system needs. Pressure sensors and control valves dynamically adjust the pump's engagement and volume ratio based on real-time pressure differentials, optimizing air consumption without requiring a permanently oversized or complex pump configuration.
Solution Approach 2:
The pump is designed to serve multiple functions: it can operate at various volume ratios to handle different pressure boosting requirements, and it can be completely bypassed when not needed. This multi-functionality allows a single pump configuration to address diverse operational scenarios without requiring excessive complexity.
3Loss of substance
If check valve is added to enable bypass operation, then air usage is reduced, but system complexity increases
Solution Approach 1:
The check valve automatically performs the bypass function based on pressure differential without requiring external control or additional complexity. When storage pressure exceeds operating pressure, the check valve self-actuates to open the bypass route, eliminating the need for complex control systems while achieving air usage reduction.
Solution Approach 2:
The check valve serves as a simple intermediary component that mediates between the storage tank and fill stations, enabling automatic pressure-based routing decisions. This single passive component provides intelligent flow control without adding significant system complexity, allowing air to bypass the pump when conditions permit.
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 achieves efficient air delivery to fill stations with reduced air consumption, allowing more air to be used for firefighting and minimizing the need for additional components and space.
Implementation Method 1
The check valve is to direct air from the at least one air storage tank to the plurality of air fill stations responsive to the storage pressure being greater than or equal to the target pressure
Implementation Method 2
The pressure regulator is to control a drive pressure of drive air provided to drive the pump, the drive pressure less than a nominal pressure rating of the pump
Data Source
AI summary
An air replenishment system includes at least one air storage tank, a pump, a plurality of air fill stations, and a check valve. The at least one air storage tank has air at a storage pressure greater than or equal to 3000 psig. The pump is coupled with the at least one air storage tank. The pump is to receive the air from the at least one storage tank and output the air at a target pressure. The plurality of air fill stations is to receive the air from the pump. The check valve is to direct air from the at least one air storage tank to the plurality of air fill stations responsive to the storage pressure being greater than or equal to the target pressure.