Investigation of the Allowable Flow Rate of Hydrogen Leakage on Receptacle

Document Number: 2008-01-0724

Date Published: April 2008

Author(s):
Masashi Takahashi - Japan Automobile Research Institute

Abstract:
In this study, hydrogen was leaked using a nozzle that simulated an actual leak port (with varied materials and diameters), and the possibility of ignition was verified to collect data useful for establishing standards for the allowable flow rate of hydrogen leakage on receptacle. With the flow rate of a hydrogen leak set at 250 mL/h(NTP) (hereinafter mL/h is NTP condition) or less, ignition of leaked hydrogen with an electric spark and a small methane-fueled flame was attempted. The results confirmed that ignition of 200 mL/h of hydrogen was not achieved under tested conditions. In some cases, hydrogen at a flow rate of 250 mL/h was ignited. Tissue paper placed in contact with the flame at a flow rate of 250 mL/h combusted, resulting the flame went out almost immediately. Therefore, it was determined that a hydrogen leak at approximately 200 mL/h that occurred in this test is a very low possibility of ignition or spreading.

File Size: 957K
Product Status: In Stock

Included in: V117-6

See other papers presented at SAE World Congress & Exhibition, April 2008, Detroit, MI, USA, Session: Fire Safety: Hydrogen Vehicle Fire Safety

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