메뉴 건너뛰기
.. 내서재 .. 알림
소속 기관/학교 인증
인증하면 논문, 학술자료 등을  무료로 열람할 수 있어요.
한국대학교, 누리자동차, 시립도서관 등 나의 기관을 확인해보세요
(국내 대학 90% 이상 구독 중)
로그인 회원가입 고객센터 ENG
주제분류

추천
검색
질문

논문 기본 정보

자료유형
학술저널
저자정보
곽지현 (방재시험연구원) 박정화 (서울과학기술대학교)
저널정보
한국위험물학회 한국위험물학회지 한국위험물학회지 제7권 제2호
발행연도
2019.12
수록면
70 - 76 (7page)
DOI
10.31333/kihm.2019.7.2.70

이용수

표지
📌
연구주제
📖
연구배경
🔬
연구방법
🏆
연구결과
AI에게 요청하기
추천
검색
질문

초록· 키워드

오류제보하기
A sprinkler system is the most frequently used among fire extinguishing systems and sprinklers are usually installed irregularly on the ceiling according to the structure and condition of protected area. Consequently, flexible hoses are used for the connection between horizontal pipes and sprinklers because they are easily bended. As common flexible hoses have a structure of spiral wrinkles, so they have big friction loss in contrast to straight pipes. In particular, discharge pressure is able to decrease under the minimum working pressure(0.1MPa) if the whole pipe length becomes too long, which affects fire control performance because of the flow rate deficiency in a cabinet type simplified sprinkler system. In this study, the friction loss characteristics of 5 common sprinkler flexible hoses was experimently considered in accordance with the type approval standard. That is, it was quantitatively examined according to the bending time and angle and how the bending condition affects the friction loss was investigated. In the experiment, the friction loss increased in accordance with the bending time and its difference between bending time also increased with the flow rate. The friction loss in case of 4 times bending in contrast to 1 time bending increased for 17%∽36% according to each hose at the flow rate of 50L/min. Furthermore, the increase of the bending angle from 30 degree to 90 degree resulted in the increase of friction loss for 16%∽22% in the condition of 2 times bending which is the most frequent case. As things turned out, the bending time and angle of sprinkler flexible hoses need to be minimized to decrease their friction loss.

목차

ABSTRACT
Ⅰ. 서론
Ⅱ. 마찰압력손실 실험장치 및 실험방법
Ⅲ. 실험결과 및 고찰
Ⅳ. 결론
References

참고문헌 (5)

참고문헌 신청

함께 읽어보면 좋을 논문

논문 유사도에 따라 DBpia 가 추천하는 논문입니다. 함께 보면 좋을 연관 논문을 확인해보세요!

이 논문의 저자 정보

이 논문과 함께 이용한 논문

최근 본 자료

전체보기

댓글(0)

0

UCI(KEPA) : I410-ECN-0101-2020-430-000265641