Structure

A structure equipped with a fuel cell system,

• wherein the structure is a vehicle or a cargo-carrying mobility, and
• wherein the structure comprises:
• a skirt configured to form an accumulation space between a bottom of the structure and the ground,
• an air supplier configured to supply off-gas, which is discharged from the fuel cell system, to at least one space selected from the group consisting of the accumulation space and an internal space of the skirt,
• a pressure discharger configured to discharge pressure accumulated in the accumulation space to outside of the skirt from a lower end of the skirt,
• a controller, and
• a pressure measurer configured to monitor the pressure in the accumulation space,
• wherein the air supplier comprises an air supply valve,
• wherein the air supply valve is at least one selected from the group consist of an oxidant off-gas discharge valve, a fuel off-gas discharge valve and a refrigerant discharge valve,
• wherein the pressure discharger is a pressure discharge valve,
• wherein the pressure measurer is a pressure sensor,
• wherein the controller imparts lift to the structure by controlling the amount of the off-gas supplied from the air supplier to at least one space selected from the group consisting of the accumulation space and the internal space of the internal space so that a predetermined pressure is maintained in the accumulation space, and by controlling the pressure discharged from the pressure discharger to the outside, and
• wherein the predetermined pressure is set so that the lift is equal to the weight of the structure, considering the following equations (1) to (3):
• Load=Weight−Lift≥0 Equation (1)
• Lift=Pressure receiving area of the structure×Pressure under the structure Equation (2)
• Pressure under the structure=Off-gas flow rate×Pressure loss of the interface between the skirt and ground. Equation (3)