게시판 > 질답게시판 > Fire Hazardous Equipment 선정 관련 문의

스테파노 Stefano

09-03-26 16:35

(1) Flash Point (인화점)
인화점은 불꽃을 가까이 댓을 때 불이 액체에 옮겨 붙을 수 있는 최저의 온도를 말하는데 이론적인 면을 살펴보면..

공기와 접하고 있는 가연성 액체의 표면에서의 증기의 농도, 몰분율) = (증기압/대기압) .............(1)
"이 농도가 그 물질의 연소하한계 농도와 같아질 때의 온도"가 바로 인화점이 되는 것이지요.

(2) 혼합물의 Flash Point(인화점) 추정 방법
혼합물의 Flash Point는 마찬가지로 공기와 증기 혼합물이 연소하한 농도가 될 때의 액체의 온도가 됩니다.

마침 이곳에 잘 설명이 되어 있습니다. http://www.uctm.edu/journal/j2006-3/04-Hristova-291-296.pdf

(3) 혼합물의 Ignition Temperature(Ignition Point, 착화점) 추정방법

자연발화점의 측정방법은 미국이나 국제표준으로 나와 있지만 혼합물의 착화점에 관해서는 아직 뚜렷하게 두드러진 방법은 소개되어 있지 않은 것 같습니다. 이는 물질이 열에 의해 활성화 되거나 분해되는 메카니즘이 아주 복잡하게 얽혀 있어서 그럴것입니다. UFL(Uppper Flammable Limit)의 경우에도 계산수식은 잘 맞지않는 것처럼 발화점 추정식에 의해 계산으로 발화점을 구했다고 해도 이의 신뢰도를 믿을 수 없은 형편이다보니 별수없이 시료를 측정해서 구해야 되는것 같습니다.

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