ALOHA 프로그램을 이용한 도시가스 배관의 누출 모델링 최적화

Abstract

Since the Process Safety Management(PSM) by Occupational Safety and Health Act has been introduced in Korea, the consequence analysis of chemical release has been actually implemented. The purpose of this paper is to suggest the guideline for the release modeling of natural gas piping. Applicable programs for the release modeling of gas pipeline are ALOHA, PHAST, etc. but ALOHA is the most reasonable program because of the benefit of cost-free and easiness to use. As the release rate in gas pipeline is largely depended on length of pipeline, it is very important to select the appropriate length of pipeline. As lots of company apply length of pipeline as the length between a gas governor and a gas burner, the result of these modeling can be different from an actual situation that is pressurized by the pipeline system of gas supplier. This paper studied the method to decide the length of pipeline by the comparison of the release rate between the infinite end piping connected to tank and closed off piping by using ALOHA program. And this paper also studied the modeling means for the low pressure pipeline under 2 atm(absolute) in pressure being not applied with the Gas pipe option of ALOHA.