Analysis of effect of hydrogen jet fire on tunnel structure

A policy to expand the hydrogen economy has been established in Korea and the supply of FCEV is being expanded to realize a hydrogen society. There fore, the supply of FCEV is expected to increase rapidly, and a solution to respond to accidents of FCEV is required. In this study, an experimental study was conducted to analyze the effect of the hydrogen jet flame generated by a FCEV on the inner wall of the tunnel and the characteristics of the internal radiant heat. For the experiment, the initial pressure of hydrogen tank was set to 700 bar, and the injection nozzle diameter was set to 1.8 mm in order to make the same as the conditions generated in the FCEV. In addition, a tunnel fire resistance test specimen having the same strength as the compressive strength of concrete applied to general tunnels of 40 MPa was manufactured and used in the experiment. The results were analyzed for the separation distance (2 m and 4 m) between the hydrogen release nozzle and the tunnel fire resistance test concrete. As the result, the maximum internal temperature of the test concrete was measured to 1,349.9°C (2 m separation distance), and the radiant heat around the jet flame was up to 39.16 kW/m2.

keywords: Tunnel, Fuel cell electric vehicle (FCEV), Hydrogen jet fire, Tunnel structure, 터널, 수소자동차, 수소 제트화염, 터널 구조물

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Article Contents

Vol.23 No.6

Analysis of effect of hydrogen jet fire on tunnel structure

Abstract

(사)한국터널지하공간학회