Fuel supply unit for a fuel cell system, fuel cell system and method for monitoring a fuel supply unit
A fuel cell system and fuel supply technology, applied in the direction of fuel cells, fuel cell additives, transportation fuel cell technology, etc., can solve problems such as increased system complexity, damage to system components, and impact on system availability, to achieve increased system effect of complexity
Inactive Publication Date: 2009-12-16
AIRBUS OPERATIONS GMBH
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Problems solved by technology
[0006] However, the accommodation of hydrogen tanks in non-pressurized areas of the aircraft has the disadvantage that the tank system is subject to considerable temperature and pressure variations, which can cause damage to system components and thus adversely affect the availability of the system
However, providing an additional hydrogen concentration sensor and / or at least two tank isolation valves inevitably leads to an increase in system complexity and thus may lead to undesired limitations on system availability
Method used
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Embodiment Construction
[0031] In the figures, a fuel supply unit 10 arranged in a pressurized region 11 of an aircraft comprises a fuel tank 12 adapted to store hydrogen under high pressure. The fuel tank 12 is connected to a fuel inlet 16 of a fuel cell 18 by a supply line 14 .
[0032] The fuel cell 18 for replacing a conventional RAT as an emergency power unit is formed as a polymer electrolyte membrane fuel cell and includes an anode region connected to the fuel inlet 16 and separated from a cathode region by a polymer electrolyte membrane. The anode exhaust outlet 20 of the fuel cell 18 is connected to a recirculation line 22 through which anode exhaust exiting the anode exhaust outlet 20 during operation of the fuel cell 18 can be returned to the fuel inlet of the fuel cell 18 16.
[0033] A dehydrator 24 is provided in the recirculation line 22 . The dehydrator 24 is used to remove water from the anode exhaust exiting the anode exhaust outlet 20 during operation of the fuel cell 18 . A rec...
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A fuel supply unit (10) for a fuel cell system which is in particular suitable for use in an aircraft comprises a fuel tank (12) and a feed line (14), which connects the fuel tank (12) to an inlet (16) of a fuel cell (18). A tank isolation valve (28) is disposed in the feed line (14). A removal line (46) connects an outlet (20) of the fuel cell (18) to an unpressurised region of the aircraft and / or the outer atmosphere. The fuel supply unit (10) also comprises a sensor (44) for detecting an electrical voltage in the fuel cell (18) and an electronic control unit (45) which is adapted to receive signals output from the sensor (44) and which is adapted to detect a fault caused by an unintentional opening or a failure of the tank isolation valve (28) based on the sensor signals, when in a quiescent operational state of the fuel cell system electrical energy is generated by the fuel cell (18).
Description
technical field [0001] The invention relates to a fuel supply unit for a fuel cell system, particularly suitable for use in an aircraft, a fuel cell system equipped with such a fuel supply unit, and a method for monitoring such a fuel supply unit . Background technique [0002] Fuel cell systems are capable of generating electric current with low emission levels and high efficiency. Therefore, attempts are currently being made to use fuel cell systems also in aircraft structures to generate the electrical energy required on board. For example, it is conceivable to replace the electrical generators currently used as the aircraft's power source and driven by the main power unit or auxiliary turbines with fuel cell systems. Fuel cell systems can also be used as an emergency power source for aircraft and replace the ram air turbine (RAT) currently used as an emergency power unit. [0003] A fuel cell generally includes a cathode region and an anode region separated from the c...
Claims
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IPC IPC(8): H01M8/04H01M8/00
CPCH01M8/04097H01M8/04119H01M2250/20Y02T90/32H01M8/04089Y02E60/50H01M8/04201Y02T90/40
Inventor 迈克尔·康尼格阿尔夫-亨宁·斯托尔特
Owner AIRBUS OPERATIONS GMBH