Work

Numerical study on the performance of a forced ventilation system under hydrogen leakage in an underground hydrogen equipment room

Year: 2026

Type: article

Abstract: . It features main and auxiliary inflow vents and fan outflow vents. Using the commercial software ANSYS Fluent, a three-dimensional transient RANS is performed to analyze hydrogen diffusion phenomena during a leakage using mass, momentum, and species-conservation equations. The study obtains numerical analysis results by varying the number of fans, open/closed state of the main inflow vent, leakage nozzle diameter, and leakage flow rate. In addition, the study examines the spatial distribution of hydrogen concentration within the room and its temporal variations at various points. The ventilation performances for different scenarios are compared and an effective ventilation method is discussed. Additionally, this study proposes the simple model to predict the volume-averaged hydrogen concentration over time and evaluates it by comparing with numerical results. The simple model effectively predicts the trend of the volume-averaged hydrogen concentration, and reasonably predicts the time at which the volume-averaged hydrogen concentration attains 1 and 4 vol%.

Source: Scientific Reports

DOI: 10.1038/s41598-026-43773-5

Authors: Hong-Cheol Shin, Inju Hwang, Hyeonseok Seo

Institution: Korea Institute of Civil Engineering and Building Technology

Language: English

Topic: Fire dynamics and safety research

Subfield: Safety, Risk, Reliability and Quality

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,690

Funders: Korea Institute of Construction Technology, Ministry of Science and ICT, South Korea