Abstract: A piping member that is used for a moving body equipped with a fuel cell and that is configured to suppress potential troubles caused by drainage water of the fuel cell. A fuel cell vehicle includes an exhaust pipe that is a piping member configured to discharge drainage water and exhaust gas of a fuel cell. The exhaust pipe includes an extended portion, a curved portion and an opening end portion and is mounted such that the exhaust pipe opens downward on the rear side of the fuel cell vehicle. The exhaust pipe is configured such that an inner wall surface of a wall portion of the opening end portion located on the front side of the vehicle is inclined from the rear side toward the front side of the fuel cell vehicle to be extended to an opening, in the state that the exhaust pipe is mounted to the fuel cell vehicle.

Abstract: A fuel cell system comprises a fuel cell stack, a circulation flow path of a cooling medium, a pump provided in the circulation flow path, a supply-side temperature sensor provided to detect a supplied cooling medium temperature, a discharge-side temperature sensor provided to detect a discharged cooling medium temperature, and a cold-start controller configured to control a circulation volume of the cooling medium by the pump at a cold start of the fuel cell stack. The cold-start controller estimates a fuel cell internal temperature and selectively sets the circulation volume of the cooling medium between a reduced volume and a normal volume, based on a magnitude relationship between the internal temperature and the discharged cooling medium temperature.

Abstract: There is provided a piping member that is used for a moving body equipped with a fuel cell and that is configured to suppress potential troubles caused by drainage water of the fuel cell. A fuel cell vehicle 1 includes an exhaust pipe 100 that is a piping member configured to discharge drainage water and exhaust gas of a fuel cell 10. The exhaust pipe 100 includes an extended portion 111, a curved portion 112 and an opening end portion 113 and is mounted such that the exhaust pipe 100 opens downward on the rear side of the fuel cell vehicle 1. The exhaust pipe 100 is configured such that an inner wall surface 121 of a wall portion 113f of the opening end portion 113 located on the front side of the vehicle is inclined from the rear side toward the front side of the fuel cell vehicle 1.

Abstract: A fuel cell system comprises a fuel cell stack, a circulation flow path of a cooling medium, a pump provided in the circulation flow path, a supply-side temperature sensor provided to detect a supplied cooling medium temperature, a discharge-side temperature sensor provided to detect a discharged cooling medium temperature, and a cold-start controller configured to control a circulation volume of the cooling medium by the pump at a cold start of the fuel cell stack. The cold-start controller estimates a fuel cell internal temperature and selectively sets the circulation volume of the cooling medium between a reduced volume and a normal volume, based on a magnitude relationship between the internal temperature and the discharged cooling medium temperature.