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The Dynamic Change in the Reliability Function Level in a Selected Fire Alarm System during a Fire.
Jacek Paś1, Tomasz Klimczak2, Adam Rosiński3
1Division of Electronic Systems Exploitations, Institute of Electronic Systems, Faculty of Electronics, Military University of Technology, 2 Gen. S. Kaliski St, 00-908 Warsaw, Poland.
Sensors (Basel, Switzerland)
|July 13, 2024
Summary
This study analyzes how fire temperatures affect fire alarm system (FAS) reliability during building fires. Understanding these impacts is crucial for designing dependable fire safety systems.
Area of Science:
- Engineering
- Fire Safety Science
- Reliability Engineering
Background:
- Fire alarm systems (FASs) must function reliably during building fires despite environmental challenges.
- System reliability is a key consideration in designing fire control matrices, algorithms, and scenarios.
- The fire alarm control unit (FCP) stores critical controls that must maintain a permissible reliability level, RDPN(t).
Purpose of the Study:
- To investigate the impact of high temperatures during fires on the functional reliability of selected fire alarm systems.
- To analyze critical paths within the fire alarm system's operational process under fire conditions.
- To develop a model for assessing fire alarm system reliability influenced by fire-generated temperatures.
Main Methods:
- Analysis of critical paths within the fire detection and suppression activation process.
- Modeling of operational paths using acceptable and unacceptable technical states.
- Review of the R(t) function waveform changes over time (Δt) to determine fitness paths.
- Development of a model and graph for the operational process of a selected FAS.
Main Results:
- High temperatures significantly impact the reliability of fire alarm system functioning.
- The study identified critical paths affected by fire conditions, particularly in detection and suppression activation.
- The waveform of the reliability function R(t) changes dynamically with time (Δt) under fire conditions.
Conclusions:
- Fire alarm system reliability is directly influenced by the temperatures generated during a fire.
- Designers must consider the impact of fire temperatures on critical system paths for enhanced reliability.
- The developed model and analysis provide insights for improving the design and implementation of fire alarm systems.
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