Proposal for ventilation performance improvement measures considering the ship’s kinetic characteristics in case of hydrogen leakage
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The goal of this research was to propose the shape of a hydrogen fuel storage room according to the roof apex angle consid-ering structural and kinetic characteristics and to analyze the effect of improving ventilation performance accordingly. The computa-tional fluid dynamics (CFD) method was used to analyze the ventilation flow rate of the exhaust vent and average hydrogen concen-tration value by applying ship motion conditions in the proposed model. Consequently, compared with the flat roof model, the proposed model increased the ventilation flow rate by up to 106% and decreased the hydrogen concentration by up to 28%. Similarly, even in mechanical ventilation, the ventilation flow rate increased by up to 19.02% and the hydrogen concentration decreased by up to 32.97%. The proposed model with a roof apex angle of 120° for both mechanical and natural ventilation was ascertained as the most effective model for hydrogen exhaust. The numerical results are expected to be helpful for research on the design of hydrogen tank storage room shapes and ventilation systems to improve the ventilation performance of hydrogen-powered ships.
Abstract
The goal of this research was to propose the shape of a hydrogen fuel storage room according to the roof apex angle consid-ering structural and kinetic characteristics and to analyze the effect of improving ventilation performance accordingly. The computa-tional fluid dynamics (CFD) method was used to analyze the ventilation flow rate of the exhaust vent and average hydrogen concen-tration value by applying ship motion conditions in the proposed model. Consequently, compared with the flat roof model, the proposed model increased the ventilation flow rate by up to 106% and decreased the hydrogen concentration by up to 28%. Similarly, even in mechanical ventilation, the ventilation flow rate increased by up to 19.02% and the hydrogen concentration decreased by up to 32.97%. The proposed model with a roof apex angle of 120° for both mechanical and natural ventilation was ascertained as the most effective model for hydrogen exhaust. The numerical results are expected to be helpful for research on the design of hydrogen tank storage room shapes and ventilation systems to improve the ventilation performance of hydrogen-powered ships.
참고문헌 (22)
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