Protective Facility ISSN:3058-7816(Print) 3058-8618(Online) 방호시설

The selection of safety distances and the establishment of facilities to mitigate damage from hydrogen leakage explosions are crucial for minimizing human and property damage and ensuring safety. This study conducted explosion tests on hydrogen-air mixed gas to measure blast overpressure at various distances and to analyze the effects of installing protective walls. The experimental setup consisted of a 2.4 m × 2.4 m × 1.5 m polyethylene tent (internal volume of 8.64 m³) filled with hydrogen at 40 % concentration. The explosion was induced by ignition within the tent. When a protective wall was installed on one side, the blast overpressure was measured at 4.8 kPa at a distance of 2.5 m and 3.4 kPa at 5 m. With protective walls installed around the setup, the blast overpressure was amplified internally, ranging from a minimum of 7.3 kPa to a maximum of 247 kPa, while it was reduced externally. These results highlight the significant reduction of blast overpressure externally due to the presence of blast walls. The study further explores the impact of blast overpressure on structural integrity and human safety. Data show the need for careful consideration of in the design aimed placement of protective wall to mitigate the risk of amplified pressure internally. Also, key observations include the correlation between the distance from the explosion and the measured overpressure and the effectiveness of protective walls in modulating these pressures. This research provides valuable insights into designing safer residential areas utilizing hydrogen energy by effectively managing and mitigating explosion risks.