Cargo Compartment Airflow and Fire Suppression Duct Integration
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Solution Overview
Problem
Traditional cargo stowage compartments in mobile platforms, such as commercial passenger aircraft, face challenges in integrating fire detection/suppression and ventilation systems, leading to inefficient performance and increased complexity due to independent design and significant ductwork requirements.
Innovation Solution
An integrated environmental control system that combines fire detection/suppression and airflow management systems, using a temperature sensor and environmental controller to optimize airflow and fire suppression agent distribution within the compartment, minimizing the need for additional ductwork.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If fire detection/suppression and ventilation systems are designed independently, then each system can be developed separately, but the integration complexity and ductwork requirements increase significantly
Solution Approach 1:
The patent combines fire detection/suppression and ventilation systems into a single integrated environmental control system. The fire suppression agent distribution network utilizes the existing ventilation ductwork, eliminating the need for separate ducting systems. The controller coordinates both ventilation and fire suppression operations through a unified control architecture, reducing integration complexity while maintaining independent developability of subsystems.
Solution Approach 2:
The ventilation ductwork serves dual purposes: normal air circulation during operation and fire suppression agent distribution during fire events. The controller performs multiple functions including temperature regulation, airflow management, and fire suppression coordination. This multi-functionality reduces the number of separate systems needed while maintaining ease of manufacture through standardized components.
2Reliability
If separate ductwork networks are used for ventilation and fire suppression, then each system operates independently, but the overall system complexity and installation cost increase
Solution Approach 1:
The patent merges the ventilation and fire suppression ductwork into a single integrated network. The same ducts that circulate air during normal operation are used to distribute fire suppression agents during fire events. This eliminates the need for parallel ductwork systems, reducing installation complexity and cost while maintaining reliable system operation through integrated control.
Solution Approach 2:
The ductwork system is designed to perform multiple functions: air circulation for temperature control during normal operation, and fire suppression agent distribution during fire events. This universal design reduces the overall ductwork complexity by eliminating redundant piping while ensuring both ventilation and fire suppression functions are reliably achieved through a single integrated infrastructure.
3Temperature
If ventilation airflow patterns are optimized for temperature control, then cargo compartment temperature is maintained, but fire detection capability may be hindered
Solution Approach 1:
The system dynamically adjusts airflow patterns based on operational mode. During normal operation, airflow is optimized for temperature control of cargo. Upon detection of a fire event, the controller dynamically changes the airflow pattern to enhance smoke detection by directing air flows toward detection sensors and preventing smoke stratification, thus maintaining temperature control capability while improving fire detection when needed.
Solution Approach 2:
The integrated controller continuously monitors temperature sensors and fire detection sensors, using feedback to adjust airflow patterns in real-time. When fire is detected, the system modifies ventilation airflow to enhance smoke detection effectiveness while maintaining appropriate temperature control, resolving the conflict between temperature optimization and fire detection capability through adaptive 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 integration enhances the operational efficiency of both systems, reduces complexity and cost, and ensures effective fire suppression without hindering airflow patterns, while minimizing ductwork requirements.
Implementation Method 1
A temperature sensor is used to sense the temperature within the compartment
Implementation Method 2
The heater is controlled by the environmental controller to heat the air being circulated into the compartment
Implementation Method 3
The fan is also controlled by the environmental controller for assisting in the circulation of air through the airflow circulation duct
Implementation Method 4
The fire suppression system typically uses a Halon agent to extinguish and suppress any fires
Data Source
AI summary
An integrated environmental control system for a cargo stowage compartment in a mobile platform, for example in a commercial passenger jet aircraft. A fire detection/suppression subsystem is integrated together with an airflow management system. The airflow management system operates to circulate, and optionally to heat or cool, air withdrawn from a cargo stowage compartment of the aircraft before the air is released back into the cargo stowage compartment. A fire suppression substance, for example, Halon gas, can be discharged directly into a recirculation duct of the airflow management system, thus reducing the duct work required to achieve fire suppression and ventilation operations for the cargo stowage compartment. The integration of the fire detection/suppression and airflow management system operations reduces the overall amount, complexity and weight of the ducting employed in a cargo stowage compartment of a commercial jet aircraft. This integration also eliminates or minimizes potential integration and control issues such as smoke penetration from the cargo stowage compartment to the passenger cabin.