Abstract: A power generation system includes: an air intake passage; a fuel cell system that includes a fuel cell; a case configured to house the fuel cell, a ventilator (air supply unit), and an air intake temperature detector configured to detect a temperature of the intake air supplied to the case; a combustion device that includes a combustor; an exhaust gas passage configured to discharge a flue gas generated in the combustion device to the outside; and a controller. The air intake passage and the exhaust gas passage are configured to allow heat exchange to occur between media flowing through the passages. The controller causes the combustion device to operate when the fuel cell system is activated and the temperature detected by the air intake temperature detector is equal to or lower than a first predetermined temperature.

Abstract: A power generation system has a power generation unit (1), a casing (2) accommodating the power generation unit (1), a ventilator (3) configured to ventilate the interior of the casing (2), and a first exhaust gas passage (4) configured to pass therethrough an exhaust gas from the ventilator (3) which is discharged out of the casing (2). The first exhaust gas passage (4) merges with a second exhaust gas passage (6) connected to a duct (11) open to outside air before the second exhaust gas passage (6) is connected to the duct (11), the second exhaust gas passage (6) being configured to pass a combustion exhaust gas from a combustion device (5) configured to generate heat to be supplied to a heat load.

Abstract: A power generation system of the present invention comprises a fuel cell system (101), a gas supply device, a controller (102), a combustion device (103), an exhaust passage (70), a gas passage used to supply a gas supplied from the gas supply device to the exhaust passage (70), and a back-flow preventing device (20) placed in the gas passage or the exhaust passage (70), and the controller (102) executes an operation for relieving a state in which a valve element remains incapable of moving away from a valve seat in the back-flow preventing device (20) in such a manner that the gas supply device is operated so that a differential pressure between an upstream side and a downstream side of the back-flow preventing device (20) becomes a value equal to or greater than the predetermined time which can relieve the state in which valve element remains incapable of moving away from the valve seat, during a shut-down state or at start-up of the fuel cell system (101).

Abstract: A power generation system of the present invention comprises: a power generation unit (1); a casing (2) that accommodates the power generation unit (1); a ventilator (3) that ventilates the interior of the casing (2); a first gas flow passage (5), arranged inside the casing (2), for a flow therethrough of gas which flows as the ventilator (3) operates; and a second gas flow passage (6), arranged inside the casing (2), for a flow therethrough of combustion exhaust gas from the power generation unit (1), wherein within the casing (2), the second gas flow passage (6) merges into the first gas flow passage (5).

Abstract: A power generator according to the present invention includes a fuel cell system (101), a combustion system (102), and a controller (103). The fuel cell system (101) includes: a fuel cell (11); a reformer (10) configured to generate a fuel through a reforming reaction between a first raw material containing a hydrocarbon and a second raw material which is water or an oxidant; a first raw material supply device (12); a second raw material supply device (13); and an oxidant supply device (14). The combustion system (102) includes: a first combustor (21); a third raw material supply device (22); a first air supply device (23); and a frame rod (24).

Abstract: A power generation system according to the present invention includes: a fuel cell system (101) including a fuel cell (11), a case (12), a reformer (14a), and a combustor (14b); a ventilator; a controller (102); a combustion device (103); and a discharge passage (70) formed to cause the case (12) and an exhaust port (103A) of the combustion device (103) to communicate with each other and configured to discharge an exhaust gas from the fuel cell system (101) and an exhaust gas from the combustion device (103) to the atmosphere through an opening of the discharge passage (70), the opening being open to the atmosphere, and the controller (102) is configured to cause the combustion device (103) to operate when the ventilator is in a stop state and then cause the ventilator to operate when the fuel cell system (101) is activated.

Abstract: A power generation system includes: a fuel cell (11); a casing (12) accommodating the fuel cell (11); a controller (102); a supply and exhaust mechanism (104) including an exhaust passage (70) and an air supply passage (78); and a damage detector, provided in at least one of the supply and exhaust mechanism (104) and the casing (12), configured to detect damage to the exhaust passage (70). The controller (102) performs control to stop operation of the power generation system when the damage detector detects damage to the exhaust passage (70).

Abstract: A power generation system of the present invention includes: a fuel cell unit (101) including a fuel cell (11) and a case (12); a controller (102); a combustion unit (103) provided outside the case (12) and configured to combust a combustible gas to supply heat; and a discharge passage (70) configured to cause the fuel cell unit (101) and the combustion unit (103) to communicate with each other, wherein in a case where an exhaust gas is being discharged to the discharge passage (70) from one of the fuel cell unit (101) and the combustion unit (103) and the controller (102) changes the flow rate of the exhaust gas discharged from the other unit, the controller (102) controls at least the flow rate of the exhaust gas discharged from the other unit such that the flow rate of the exhaust gas discharged from the one unit becomes constant.

Abstract: A fuel cell system and an operation method thereof are provided, which are capable of properly executing special shutdown of the fuel cell system in the event of a trouble in purge operation by use of material gas. In the fuel cell system (100), if an abnormality occurs in a purge process by use of material gas during shutdown of the fuel cell system (100), the controller (11) brings, according to the contents of the abnormality, the opening/closing state of fuel electrode opening/closing devices (26, 23, 24) for opening and closing the outlet/inlet of a fuel electrode (13a), oxidant electrode opening/closing devices (25, 28, 20, 27) for opening and closing the outlet/inlet of an oxidant electrode (13c) or hydrogen generator opening/closing devices (21, 23, 22) for opening and closing the outlet/inlet of a hydrogen generator (12) into a state that is different from their opening/closing state when the purge process by use of the material gas is performed.

Abstract: A power generation system according to the present invention includes: a fuel cell system (101) including a fuel cell (11) and a case (12); a ventilation fan (13); a controller (102); a combustion device (103); and a discharge passage (70) formed to cause the case (12) and an exhaust port (103A) of the combustion device (103) to communicate with each other and configured to discharge an exhaust gas from the fuel cell system (101) and an exhaust gas from the combustion device (103) to the atmosphere through an opening of the discharge passage (70), the opening being open to the atmosphere, and the ventilation fan (13) is configured to discharge a gas in the case (12) to the discharge passage (70) to ventilate the inside of the case (12), and the controller (102) causes the ventilation fan (13) to generate predetermined pressure or higher when the fuel cell system (101) is in a power generation stop state and the combustion device (103) is operating.

Abstract: A power generation system according to the present invention includes: a fuel cell system (101) including a fuel cell (11) and a case (12); a ventilation fan (13); a controller (102); a combustion device (103); and a discharge passage (70) formed to cause the case (12) and an exhaust port (103A) of the combustion device (103) to communicate with each other and configured to discharge an exhaust gas from the fuel cell system (101) and the combustion device (103) to an atmosphere from an opening of the discharge passage (70), the opening being open to the atmosphere. The ventilation fan (13) is configured to ventilate an inside of the case (12). In a case where the controller (102) determines that the combustion device (103) has operated when the ventilation fan (13) is operating, the controller (102) increases the operation amount of the ventilation fan (13).

Abstract: A method of operating a fuel cell system (100) comprises the steps of: generating a hydrogen-containing gas from a gas containing at least one of a nitrogen gas and a nitrogen compound, by a hydrogen generator (2); removing ammonia from the hydrogen-containing gas; detecting a temperature of the hydrogen-containing gas from which the ammonia has been removed; and starting supplying of the hydrogen-containing gas from the hydrogen generator (2) to the fuel cell (7), when the detected temperature of the hydrogen-containing gas is equal to or higher than a predetermined threshold.

Abstract: A fuel cell system 100 includes: a reformer 1 configured to generate a hydrogen-containing gas by using a raw material; a fuel cell 6 configured to generate electric power by using the hydrogen-containing gas; an ammonia remover 5 configured to remove ammonia from the hydrogen-containing gas generated in the reformer before the hydrogen-containing gas is supplied to the fuel cell; a fluid passage configured to allow the ammonia remover to be in communication with the atmosphere; an on-off valve 8 provided on the fluid passage and configured to allow and block the communication between the ammonia remover and the atmosphere; and a controller 80 configured to open the on-off valve in at least one of a water draining process and a water loading process of the ammonia remover.

Abstract: A fuel cell system of the present invention comprises a fuel cell (1) configured to generate electric power using a fuel gas, a fuel gas generator (2) configured to generate a fuel gas containing hydrogen using a raw material, a combustion burner (2a) configured to heat the fuel gas generator, a combustion fan (2b) configured to supply air to a combustion burner (2a), and a controller (101). The raw material is filled inside the fuel cell (1) before the fuel gas is supplied to the fuel cell. The controller (101) controls on-off valves (8, 9) to cause the fuel gas to branch to flow to a second path (R2) and to a fourth path (R4) when the fuel gas generated in the fuel gas generator (2) starts to be supplied to the fuel cell (1).

Abstract: A fuel cell system includes: a fuel cell (1) configured to generate electric power by a reaction between fuel and an oxidizing agent; a cooling passage (3) through which a first heat medium for cooling down the fuel cell (1) flows; a heat exchanger (5) disposed on the cooling passage (3); and an exhaust heat recovery passage (7) through which a second heat medium which exchanges heat with the first heat medium by the heat exchanger (5) flows, wherein a deceleration portion (7c) configured to reduce a flow velocity of the second heat medium and a bubble release portion (7d) configured to discharge bubbles in the deceleration portion (7c) to an outside of the exhaust heat recovery passage (7) are disposed on the exhaust heat recovery passage (7).

Abstract: A fuel cell system (100) includes: a hydrogen generator (2) including a reformer (3); a combustor (5) configured to supply heat to the reformer (3); a fuel cell (1); a first channel (10); a second channel (8); a third channel (16) through which an oxidation gas flows, the oxidation gas being supplied to the first channel (10) extending between a branch portion (10a) and the fuel cell (1); a first on-off valve (7a) provided on the first channel (10) located downstream of a meeting portion (10c); a second on-off valve (6) provided on the second channel (8); an oxidation gas supply unit (15) provided on the third channel (16); and a controller (200) configured such that when the first on-off valve (7a) is closed and the second on-off valve (6) is opened, and a hydrogen-containing gas is discharged from the hydrogen generator (2) at the time of start-up, the controller (200) activates the oxidation gas supply unit (15) to supply the oxidation gas through the third channel (16) to the first channel (10) located do

Abstract: A fuel cell system of the present invention includes: a reformer (1) configured to generate a hydrogen-containing fuel gas from a material gas and steam; a fuel cell (101) configured to generate electric power by using a fuel gas supplied from the reformer (1); a water tank (3) configured to store water; a water utilizing device configured to utilize the water supplied from the water tank (3); a first water supply unit (5) disposed on a water passage (30) extending from the water tank (3) to the water utilizing device and configured to supply the water in the water tank (3) to the water utilizing device; and a purifier (4) disposed on the water passage (30) and configured to purify the water flowing through the water passage (30), and the purifier (4) is provided such that when a water level of the water tank (3) is a full water level, the purifier (4) is filled with the water by the weight of the water.

Abstract: A fuel cell system of the present invention includes: a fuel cell (1); a water circulation passage through which water circulates, the water being necessary for an operation of a fuel cell system (100); a separation mechanism configured to divide the water circulation passage into a plurality of blocks when removing the water and to cut the flow of the water among the blocks; water discharge passages respectively connected to the blocks; and water discharge valves respectively provided on the water discharge passages.

Abstract: A fuel cell system according to the present invention includes: a hydrogen generator (12) including a burner (4) which is detachably accommodated in the hydrogen generator (12) in a manner to allow the burner (4) to be detached from and attached to the hydrogen generator (12) through the top of the hydrogen generator (12); a stack (5) configured to generate power by causing hydrogen generated by the hydrogen generator (12) and an oxidizing gas to react with each other; and a main body package (1) which includes at least a top plate (2) and within which the hydrogen generator (12) and the stack (5) are disposed. Detachable piping (31), which is detachably configured, is provided above the hydrogen generator (12). Space that is formed above the burner (4) when the detachable piping (31) is removed from the main body package (1) has a size larger than or equal to the size of the burner.

Abstract: The possibility of carbon deposition from a raw material gas is made lower than before in a pressure compensating operation carried out after stopping the stop process of a hydrogen generator and a fuel cell system including the hydrogen generator.