This study quantitatively analyzed the effect of ceiling height on the response time of rate of rise heat detectors. A 7 m × 5 m simulation model was constructed using the PyroSim program, and scenarios were conducted by varying the installation height from 4.0 m to 7.5 m in 0.5 m increments. A wooden pallet fire source, placed at a height of 1.22 m, was simulated. The simulation results showed that as the installation height increased, the response time was delayed from 155.6 seconds to 204.6 seconds a difference of approximately 49 seconds. Meanwhile, the activation temperature decreased from 50.4 ℃ to 43.4 ℃, representing a drop of about 7 ℃. These findings indicate that in structures with higher ceilings, the responsiveness of detectors may be compromised due to the delayed arrival of hot air flows. Therefore, current height based installation standards in prescriptive design should be re-evaluated for high ceiling structures. Complementary design measures such as optimized placement, detector type selection, and increased installation density are recommended.

Abstract
1. 서 론
2. 선행연구 및 기초이론
    2.1 선행연구
    2.2 차동식 스포트형 감지기
3. 본론
    3.1 연구 모델 및 시나리오 구성
    3.2 PyroSim 프로그램
    3.3 입력변수 및 입력값
    3.4 연구결과 및 고찰
4. 결 론
5. References
저자 소개

• 공하성(우석대학교 소방방재학과 교수) | Hasung Kong (Professor, Fire and Disaster Prevention, Woosuk University.) Corresponding author
• 김주성(우석대학교 일반대학원 소방안전공학과 박사과정) | Jusung Kim (Graduate Student, Dept. of Fire & Safety Engineering, Woosuk University)