| 摘要 |
<P>PROBLEM TO BE SOLVED: To efficiently utilize a boil-off gas, which is generated by the vaporization of liquid hydrogen, due to the heat of a superconducting motor by re-liquefying it, when the liquid hydrogen for a fuel cell is used as a cooling medium for the superconducting motor. <P>SOLUTION: The electric automobile is provided with the superconducting motor 14 for driving a vehicle, the fuel cell 12 for feeding power to the superconducting motor 14, and a tank 11 for storing the liquid hydrogen as fuel. Liquid hydrogen in a vaporized state is fed to the fuel cell 12 from the tank 11 via a piping 23 for a hydrogen gas. Liquid hydrogen is circulated as the cooling medium to a cooling path 19 provided on the superconducting motor 14 via cooling piping 18 from the tank 11. A piping 20 for the boil-off gas, which collects the boil-off gas being the vaporized liquid hydrogen and makes it flow into the cooling piping 18 and the cooling path 19, is provided by being made to communicate with the cooling piping 18 and the cooling path 19. The boil-off gas is re-liquefied with a cooling device 15 for liquefaction, to which the other end of the piping 20 for the boil-off gas is connected. The liquefied boil-off gas is returned to the tank 11 via a piping 22 for refluxing the liquid hydrogen interposed between the cooling device 15 for liquefaction and the tank 11. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
