earticle

영어

This paper focuses on a hospital building as the research object and investigates the impact of different sprinklers on the Available Safe Evacuation Time (ASET) after a fire. According to Chinese standards, sprinklers are categorized into fast response sprinkler, special response sprinkler, and standard response sprinkler based on their sensitivity. And we designed four scenarios: (1) no automatic sprinkler system, (2) an automatic sprinkler system with fast response sprinklers, (3) an automatic sprinkler system with special response sprinklers, and (4) an automatic sprinkler system with standard response sprinklers. The fire origin is set on the first floor of the building, and fire simulations are conducted using PyroSim software. The study examines the effects of different sprinklers on the ASET were discussed from four aspects: temperature, visibility, CO concentration, and O2 concentration. After simulating the scenarios, we found that the ASETs of the four scenarios are as follows: 447 s, 458 s, 451 s, and 447 s, respectively. Among these, the fast response sprinklers demonstrate the most effective fire suppression in hospital buildings. Additionally, compared to Scenario 1, the ASET on the first floor in Scenario 2 increases from 533 s to 553 s, representing a 3.75% improvement; the ASET on the second floor increases from 447 s to 458 s, a 2.46% improvement. The activation of the automatic sprinkler system significantly improves the ASET of the floor where the fire originates.