환기율과 급기구 개수 변화에 따른 밀폐공간 내 황화수소 농도 분포 분석
Analysis of Hydrogen Sulfide Concentration Distribution in a Confined Space under Variations in Air Change Rate and Number of Inlets
According to the Ministry of Employment and Labor, 338 people were injured in confined space suffocation accidents between 2014 and 2023, 136 of whom died. Accidents are especially concentrated in wastewater treatment facilities, septic tanks, and livestock manure treatment facilities, where harmful gases are heavier than air and accumulate at the bottom, causing suffocation and death. However, there is a lack of relevant research in Korea. This study analyzed the ventilation performance to keep the hydrogen sulfide concentration below the safety standard concentration. The number, location, and amount of ventilation were set as design variables under the condition of a floor oxygenator and an exhaust fan, and the conditions for a concentration below the permissible standard were derived. Concentration distributions under various scenarios were analyzed to suggest efficient ventilation design in confined spaces. The results can be utilized as a guide for ventilation design and worker safety.
목차
Abstract 1. 서론 2. 시뮬레이션 개요 2.1 해석 형상 및 설계 변수 2.2 해석 방법 및 격자 3. 해석결과 3.1 기본 형상 해석 결과 3.2 환기 성능 해석 결과 3.3 급기구 별 세부 결과 및 체류시간 분석 4. 결론 후기 References