摘要:
A fuel cell system of the present invention includes: a fuel cell (1) supplied with fuel gas and oxidizing gas to generate electricity; a fuel gas supply unit supplying the fuel gas to the fuel cell (1); an oxidizing gas supply unit supplying the oxidizing gas to the fuel cell (1); an aftercooler (7) cooling the oxidizing gas supplied to the fuel cell (1) by heat exchange with a coolant; an oxidizing gas temperature detector (16, 17) detecting temperature of the oxidizing gas; and a coolant circulation controller (21a) starting circulation of the coolant when the detected temperature of the oxidizing gas exceeds a predetermined value. The predetermined value is set to a value of not higher than a minimum electricity generation temperature of the fuel cell (1), and a circulation timing and flow rate of the coolant for the aftercooler (7) are controlled such that the supplied oxidizing gas does not become cold. This enables the fuel cell (1) to generate electricity at cold start-up.
摘要:
An EMS (200) is provided with a control unit (230) for instructing a fuel cell unit (150) to operate in one of operation modes including an idling mode for performing a control to cover power consumption of auxiliaries by power other than grid power, and a constant temperature mode for performing a control to cover the power consumption of the auxiliaries by power supplied from the outside and keep a temperature of a cell stack (51B) within a predetermined temperature range. When a power failure occurs while the fuel cell unit (150) is operating in the constant temperature mode, the control unit (230) controls the fuel cell unit (150) to operate in the idling mode.
摘要:
The present invention provides a gas generator that may be used for startup and shutdown of a fuel cell. In one non-limiting embodiment, the gas generator may include a nitrogen generator structured to receive air, extract oxygen (O 2 ) from the air and discharge the balance in the form of a nitrogen-rich gas; a merging chamber structured to receive a hydrocarbon fuel and the nitrogen-rich gas and to discharge a feed mixture containing both the hydrocarbon fuel and the nitrogen-rich gas; and a catalytic reactor structured to receive the feed mixture and to catalytically convert the feed mixture into a reducing gas.
摘要:
An energy management system having a fuel cell apparatus (150) as a power generator that generates power using fuel, and an EMS (200) that communicates with the fuel cell apparatus (150). The EMS (200) receives messages that indicate the status of the fuel cell apparatus (150) when normal operation, from the fuel cell apparatus (150).
摘要:
An object of the invention is to improve durability of a SOFC system and secure favorable power generation performance during the actual useful service period of the system. In the SOFC system, the fuel gas flow rate to the fuel cell stack at the time of the start of start-up is set to the maximum fuel gas flow rate at the time of start-up control that is less than or equal to 1.3 times the maximum fuel gas flow rate Fg MAX at the time of the rated power generation, the fuel gas flow rate F2 until the temperature T of the fuel cell stack reaches the first temperature T1 after start of the temperature increase, at which the reduction of the oxidized Ni in the fuel cell stack is performed, is set to be less than or equal to F1, and thereafter, until the start of the power generation, fuel gas flow rate F3 is further reduced from F2, and the average fuel gas flow rate F AVE from the start of start-up control to the start of the power generation is set to be equal to or greater than 0.6 times the average fuel gas flow rate Fg AVE at the time of the rated power generation.
摘要:
A preferred stopping method for a SOFC system of the invention leads to an improvement in durability. The SOFC system houses a reformer (6) and a fuel cell stack (10) in a module case (2). Each cell (20) forming the fuel cell stack (10) is made of a porous material having a composition containing at least nickel metal, includes a cell support having a gas passage (22) through which the fuel gas from the reformer (6) flows from an lower end to an upper end on the inside thereof, and the cell (20) is formed by stacking a fuel electrode layer, a solid oxide electrolyte layer, and an air electrode layer on the cell support, and the excessive fuel gas is combusted at the upper end of the gas passage (22). Here, after the power generation stops, until the temperature of the maximum temperature portion (the upper end) of the fuel cell stack (10) falls below the minimum oxidation temperature of the nickel metal, the supply amount of the fuel gas to the fuel cell stack (10) is controlled in terms of a heat flow rate within a range of 0.1 to 0.5 times that during the system rated power generation.
摘要:
An EMS (200) is provided with a control unit (230) for instructing a fuel cell unit (150) to operate in one of operation modes including an idling mode for performing a control to cover power consumption of auxiliaries by power other than grid power, and a constant temperature mode for performing a control to cover the power consumption of the auxiliaries by power supplied from the outside and keep a temperature of a cell stack (51B) within a predetermined temperature range. When a power failure occurs while the fuel cell unit (150) is operating in the constant temperature mode, the control unit (230) controls the fuel cell unit (150) to operate in the idling mode.
摘要:
To provide a configuration such that cooling capacity of a first heat exchanger (19) for cooling a reformed gas introduced into an inlet of a circulation pump (14) is increased as an output of a fuel cell (11) increases. With this configuration, a characteristic is provided such that an inlet temperature of the circulation pump (14) is relatively high during low power generation and decreases as the generation power increases, and a volumetric flow rate during high power generation in which a large amount of reformed gas is required can be decreased relatively. As the result, a dynamic range required for the circulation pump (14) can be made small. Furthermore, water condensation in the inlet of the circulation pump (14) can be prevented during low power generation.