JP2009283245A - Fuel cell system, and control method of hydrogen generation amount - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hydrogen manufacturing device and a control method of hydrogen generation amount, can supply water in proportion to hydrogen need on a load side with superior responsiveness by a simple constitution. <P>SOLUTION: This is equipped with a tank 2 to store water or an alkaline aqueous solution, a reactor 4 to store a hydrogen generating material to generate hydrogen in reaction with water or the alkaline aqueous solution, a pump 6 to supply the water or the alkaline aqueous solution in the tank to the reactor, a hydrogen gas flow passage 8 to supply a hydrogen gas formed in the reactor to a fuel cell 5, and supply control means 10, 11 which are interposed in this hydrogen gas flow passage and control an ejection amount of water or the alkaline aqueous solution from the pump in response to a hydrogen gas flow rate sent out from the reactor. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a fuel cell system and a hydrogen generation amount control method for generating hydrogen gas by supplying water to a hydrogen generating material.

  In recent years, there has been a demand for a high capacity portable power source used in notebook computers, mobile phones, and the like, and fuel cells have attracted attention as power sources that can replace lithium ion secondary batteries.

  Fuel cells have the advantage that they can be used continuously as long as they are supplied with fuel and oxygen, and there are various types of hydrogen generating substances that serve as the fuel.

For example, a main reaction formula between aluminum and water, which is a typical hydrogen generating material, is expressed as shown in Equation (1), and the equivalent amount for each hydrogen generating material is determined.
2Al + 6H ₂ 0 → 2Al (OH) ₃ + 3H ₂ (1)

  However, since many hydrogen generating materials have an oxide film on the surface thereof, the reaction hardly proceeds inward and it is difficult to make the hydrogen generating material contribute 100% to the reaction.

  On the other hand, if water has a sufficient reaction surface for the hydrogen generating material, almost the entire amount can be contributed to the reaction by dropping it into the voids of the filler made of the hydrogen generating material.

  For example, in Patent Document 1, a hydrogen generating agent obtained by mixing a predetermined amount of aluminum powder and calcium oxide powder is contained in a container, and a certain amount of water is continuously or intermittently used in the container using a pump or the like. A hydrogen generation apparatus that can generate a certain amount of hydrogen over a long period of time by introducing is disclosed.

  In addition, in the hydrogen gas generator described in Patent Document 2, the inside of the reaction vessel can be easily increased to a high pressure only by increasing the pump pressure using a water supply pump and an alkaline aqueous solution pump. A high-pressure reaction field can be formed.

Patent Documents 3 to 6 disclose a hydrogen production apparatus provided with means for controlling the amount of water supplied to the hydrogen generating material in the reaction vessel.
JP 2004-231466 A JP 2005-204559 A JP 2006-306700 A JP 2007-45646 A JP 2007-5275 A JP 2006-335603 A

  However, the amount of water supplied to the hydrogen generating material must be controlled according to the amount of hydrogen consumed by laptop computers, mobile phones, etc., in other words, according to the demand for hydrogen on the load side. It has not been.

  For example, in Patent Document 2, a method of adjusting the pressure of hydrogen gas to a predetermined pressure with a pressure regulator, and in Patent Document 5, a water tank and a reactor are connected via a water supply paper, and a capillary tube of the water supply paper is used. Only a method of supplying a constant minute flow rate according to the phenomenon is described.

  In a hydrogen production apparatus that obtains hydrogen by reacting metal fine particles with water or an alkaline aqueous solution, the generated gas is almost only hydrogen, so that it has a feature that high-purity hydrogen gas can be obtained. Since there is no generation of carbon oxide, it is advantageous for a polymer electrolyte fuel cell that is vulnerable to poisoning of carbon monoxide.

  However, in this type of hydrogen production apparatus, the time from when water is supplied until hydrogen is generated by the reaction depends on the particle size and temperature of the hydrogen-generating substance, but it takes several minutes at the earliest. Even if the supply of water is stopped, it takes several minutes until the generation of hydrogen gas stops (see FIGS. 1 and 2 of Patent Document 6).

  Therefore, as shown in Patent Document 2, since the control by the pressure regulator continues to produce hydrogen gas for several minutes at the time of stoppage, there is a possibility that a large excessive pressure is generated in the reactor. In order to avoid this, it is inevitable that the control system has a large time constant, that is, a slow response speed so that the pressure is constant. In addition, it is difficult to reduce the size of the reactor.

  In the control system shown in Patent Document 5, it is difficult to efficiently respond to the load side hydrogen demand.

  The present invention has been made in consideration of the problems in the conventional hydrogen generation (manufacturing) apparatus as described above, and is capable of supplying water with a simple structure in proportion to the load-side hydrogen demand with good responsiveness. The present invention provides a hydrogen production apparatus and a hydrogen generation amount control method.

The fuel cell system of the present invention comprises:
A tank for storing water or an alkaline aqueous solution;
A reactor containing a hydrogen generating material that reacts with the water or an aqueous alkaline solution to generate hydrogen;
A pump for supplying water or alkaline aqueous solution in the tank to the reactor;
A hydrogen gas flow path for supplying hydrogen gas generated in the reactor to the fuel cell;
The gist of the invention is that it comprises supply control means that is provided in the hydrogen gas flow path and controls the discharge amount of water or alkaline aqueous solution from the pump in accordance with the flow rate of hydrogen gas delivered from the reactor.

  In the fuel cell system, the hydrogen generating material may include at least one selected from the group consisting of aluminum, magnesium, silicon, zinc, and iron.

  In the fuel cell system, as the supply control means, a flow meter provided in the hydrogen gas flow path, and an inverter that converts a flow signal output from the flow meter into an alternating current proportional to the hydrogen gas flow rate. And the inverter can be configured to be driven by an AC motor.

  In the fuel cell system, as the supply control means, a flow meter provided in the hydrogen gas flow path, and a PWM control device that converts a flow signal output from the flow meter into a pulse signal proportional to the hydrogen gas flow rate. The pump can be configured to be driven by a DC motor by this PWM control device.

  In the fuel cell system, as the supply control means, a turbine provided in the hydrogen gas flow path, a gear provided on the rotating shaft of the turbine, and a gear provided on the rotating shaft of the pump are predetermined with respect to the gear. And a gear that meshes with the gear ratio, and the turbine and the pump can be linked to each other.

  In the fuel cell system, the supply control means includes a turbine provided in the hydrogen gas flow path and a generator provided on a rotating shaft of the turbine, and the pump is supplied with electric power obtained by the generator. Can be configured to be driven.

The hydrogen generation amount control method of the present invention is:
Water or alkaline aqueous solution is stored in a tank, a hydrogen generating substance that generates hydrogen by reacting with the water or alkaline aqueous solution is contained in the reactor, water or alkaline aqueous solution in the tank is supplied to the reactor, and The gist is to supply hydrogen gas generated in the reactor to the fuel cell, and to control the supply of water or alkaline aqueous solution to the reactor in proportion to the flow rate of hydrogen gas sent out from the reactor.

  In the hydrogen generation amount control method, the hydrogen gas flow rate is measured by a flow meter, the flow signal output from the flow meter is converted into an alternating current proportional to the hydrogen gas flow rate by an inverter, and the pump is turned on by the inverter. It can be driven by an AC motor.

  In the hydrogen generation amount control method, the hydrogen gas flow rate is measured by a flow meter, the flow rate signal output from the flow meter is converted into a pulse signal proportional to the hydrogen gas flow rate by a PWM controller, and the pump is PWM-controlled. It can be driven by a controlled DC motor.

  In the hydrogen generation amount control method, a turbine is provided in the hydrogen gas flow path, and a gear provided on the rotating shaft of the turbine and a gear provided on the rotating shaft of the pump are meshed at a predetermined gear ratio. The turbine and the pump can be interlocked.

  In the hydrogen generation amount control method, a turbine may be provided in the hydrogen gas flow path, a generator may be provided on the rotating shaft of the turbine, and the pump may be driven by electric power obtained by the generator.

  According to the present invention, there is an advantage that water can be produced without excess or deficiency by supplying water with good responsiveness to the reactor in proportion to the load-side hydrogen demand.

  Hereinafter, the present invention will be described in detail based on the embodiments shown in the drawings.

  In the fuel cell system of the present invention, if the hydrogen generating material has a sufficient reaction surface, if water or an alkaline aqueous solution is dropped into the void of the hydrogen generating material filler, almost the entire amount can contribute to the reaction, and hydrogen By utilizing the fact that the equivalent amount contributing to the reaction is determined for each generated substance, water can be supplied to the reactor with high responsiveness in proportion to the hydrogen demand on the load side.

  For example, taking aluminum as an example of the hydrogen generating material, the equivalent amount contributing to the reaction is determined by the theoretical equivalent of hydrogen generation by the reaction between aluminum and water, as shown in Table 1.

  In an actual reaction, since it is governed by a plurality of reaction formulas that are oxidized to alumina, the equivalence ratio depends on the particle size and temperature, and does not completely match Table 1, but is almost the same value. Here, it demonstrates using a theoretical equivalent.

  According to Table 1, 6 g of hydrogen is generated by feeding 108 g of water to a reactor filled with aluminum powder. If 6 g of hydrogen is supplied to the polymer electrolyte fuel cell, the theoretical electromotive force of the cell becomes 1.23 V. However, in a normal polymer electrolyte fuel cell, there is a reaction loss at the electrode, so 0.7 V Only a degree of electromotive force can be obtained. Thus, the energy obtained is 203 kJ (56 Wh).

  Further, in order to obtain a hydrogen supply pressure, a normal polymer electrolyte fuel cell requires a pressure of about 0.05 MPa as a differential pressure from the atmospheric pressure.

  The purpose of the present invention is to meet the load-side hydrogen demand with a simple device. Specifically, for example, when 6 g of hydrogen flows from the reactor toward the polymer electrolyte fuel cell, 108 g of water is commensurate with it. Is controlled to be supplied to the reactor via a pump.

1. First Embodiment of Fuel Cell System According to the Present Invention FIG. 1 shows a basic configuration of a fuel cell system 1 according to the present invention as a first embodiment.

  In the figure, water is stored in a water tank (tank) 2 and its pressure is P1.

  Normally, the water tank 2 is opened to the atmosphere to supply water, and therefore the pressure P1 is atmospheric pressure.

  The water tank 2 is connected to a reactor 4 through a water supply pipe 3, and the pressure P2 in the reactor 4 is a polymer electrolyte fuel cell (PEFC) as a load (hereinafter abbreviated as a fuel cell). It is necessary to make the pressure slightly higher than the pressure P3 required by the fifth side. Therefore, the water in the water tank 2 is supplied to the reactor 4 having a high pressure by the pump 6 provided in the water supply pipe 3.

  Further, a check valve 7 is interposed in the water supply pipe 3 between the pump 6 and the reactor 4 so that hydrogen gas in the reactor 4 does not flow into the water tank 2 side. The check valve 7 can be constituted by a known check valve, swing valve or the like.

  The pump 6 may be a type driven by an AC motor or a type driven by a DC motor. Furthermore, a pump of a type in which power is directly supplied from the drive shaft without having an electric motor may be used.

  Hydrogen gas generated in the reactor 4 is supplied to the fuel cell 5 through a hydrogen supply pipe (hydrogen gas flow path) 8, and a flow rate adjusting valve 9 is interposed in the hydrogen supply pipe 8. .

  The flow regulating valve 9 is normally opened, and when there is no demand for hydrogen or when the amount is very small, the hydrogen gas supply pressure to the fuel cell 5 is increased, and the pressure is set as the pilot pressure Pa. It is designed to close.

  Further, a flow meter 10 is interposed downstream of the flow rate adjusting valve 9 in the hydrogen supply pipe 8.

  As the flow meter 10, the pressure on the upstream side thereof, that is, the pressure P2 in the reactor 4 fluctuates, so that the mass flow meter can accurately measure the mass flow rate (for example, CMS0010 manufactured by Yamatake Corporation). Can be used.

  The signal output 0-5V from the mass flow meter is taken in, and the electric power output from the inverter 11 via the inverter 11 having a PID control function (for example, FRENIC series manufactured by Fuji Electric Control Co., Ltd.) By driving an inverter-compatible AC motor (not shown), the amount of water supplied to the reactor 4 can be controlled with good responsiveness in proportion to the flow rate of hydrogen gas flowing in the hydrogen supply pipe 8.

  The flow meter 10 and the inverter 11 function as supply control means for controlling the amount of water discharged from the pump 6 in proportion to the flow rate of hydrogen gas sent out from the reactor 4.

  Various types of stainless steel pumps can be used for the pump 6.

  This type of pump 6 does not need to stick to a constant flow pump such as a diaphragm pump, and has a high flow rate Q when the pump pressure P is small, as in a normal centrifugal pump (see point a in FIG. 5). When the pressure P increases, the flow rate Q decreases (see point b in FIG. 5), and a pump having a so-called PQ characteristic is more convenient.

  This is because when the pressure P2 in the reactor 4 rises above the steady pressure and the pump pressure P increases, the amount of water supplied (flow rate Q) automatically decreases, and the pressure P2 in the reactor 4 falls below the steady pressure. This is because when the pressure P decreases and the pump pressure P decreases, the amount of water supplied (flow rate Q) automatically increases.

  The inverter 11 can be replaced with a PWM control device. In this case, the output signal 0-5V from the flow meter 10 is taken in, and the AC motor of the pump 6 is driven by a DC pulse current subjected to PWM control.

2. Second Embodiment of Fuel Cell System According to the Present Invention A fuel cell system 20 shown in FIG. 2 is provided with a micro turbine 21 in place of the flow meter 10 so that a part of the pressure in the reactor 4 is recovered as work. I have to.

  2 that are the same as those in FIG. 1 are assigned the same reference numerals and descriptions thereof are omitted.

  In FIG. 2, a micro turbine 21 is interposed between the flow rate adjusting valve 9 provided in the hydrogen supply pipe 8 and the fuel cell 5.

  A gear 22 is provided at the end of the rotating shaft of the micro turbine 21, and the gear 22 meshes with a gear 23 provided on the rotating shaft of the pump 6 at a predetermined ratio. Thereby, the micro turbine 21 and the pump 6 are linked via gears 22 and 23, and the pump 6 supplies the water in the water tank 2 to the reactor 4 as the micro turbine 21 is driven. Yes.

  The micro turbine 21 and the gears 22 and 23 function as supply control means for controlling the amount of water discharged from the pump 6 in proportion to the flow rate of hydrogen gas delivered from the reactor 4.

  Thus, since the micro turbine 21 recovers a part of the pressure in the reactor 4 as work, the recovered work can be used as power for the pump 6. Moreover, according to the said structure using the characteristic that the power which can be collect | recovered receives the influence of the pressure in the reactor 4, the system which supplies hydrogen stably stably can be provided.

  When the present invention is applied to, for example, a notebook personal computer consuming 5.6 W using the micro turbine 21, the pump 6, and the flow rate adjusting valve 9 shown in the specifications of Table 2 below, the system of the fuel cell system 20 is This will be explained below.

  In the reaction between aluminum and water, as shown in the theoretical equivalent in hydrogen generation (see Table 1), the energy obtained is 56 Wh, so a 5.6 W notebook computer can be driven for 10 hours.

Therefore, the mass flow rate dot mH ₂ of hydrogen is 0.6 g / h. At this time, the water supply dot mH ₂ O is desired to be 10.8 g / h.

  If the pressure P2 in the reactor 4 is 0.0518 MPa and the temperature T2 is 313 K, water is supplied from the water tank 2 to the reactor 4 in consideration of the pressure loss ΔP = 0.05 MPa of the check valve 7. The axial work Wp required to do this is obtained by the following equation (2).

Here, ρH ₂ O is the density of water and is 1000 kg / m ³ . On the other hand, from the reactor 4 of the pressure P2, the recovery work W _T in the micro turbine 21 for supplying hydrogen gas to the fuel cell 5 for requesting the pressure P3 is determined by the following equation (3).

ただし、ρＨ_２ ＝０．１１７７は反応器４内の状態での水素ガス密度である。

However, ρH ₂ = 0.1177 is the hydrogen gas density in the reactor 4.

As a result of this calculation, it was confirmed that W _T = W _P was established, and thus the system of the fuel cell system 20 was established in a steady state.

  Furthermore, a case will be described in which the hydrogen demand 0.6 g / h from the fuel cell 5 side remains unchanged from this state, and the pressure P2 in the reactor 4 is decreased by a small amount to 0.0510 MPa.

  While the hydrogen reaction rate in the fuel cell 5 remains the same, the pressure in the vicinity of the electrode also decreases as the upstream pressure decreases, and as a result, the pressure P3 in the fuel electrode 5 also decreases by approximately the same pressure to 0.0492 MPa. become.

Therefore, the recovery work W _T in the micro turbine 21, the density of hydrogen gas pressure P2 is reduced in the reactor 4 also increases the volume flow by reducing the following equation (4) slightly To increase.

On the other hand, shaft power W _P supplied to the pump 6 is slightly decreased by the following equation in the pressure P2 in the reactor 4 as follows is reduced (5).

Therefore, W _T > W _P and the pump 6 will do more work, ie increase the supply of water. As a result, the pressure P2 in the reactor 4 increases.

When the pressure P2 in the reactor 4 is increased, a phenomenon opposite to that in the case where the pressure P2 is decreased occurs, and W _T <W _{P is obtained} . Will decrease. In this way, the system of the fuel cell system 20 operates essentially stably.

  Furthermore, the stability in steady operation can be further increased by attaching a flywheel to the rotating shaft of the micro turbine 21. However, if an excessively large flywheel is attached, the followability will be delayed if the fluctuation of the hydrogen demand on the fuel cell 5 side is fast. Therefore, it is necessary to select an appropriate flywheel size. is there.

  FIG. 3 shows a specific configuration when the fuel cell system is applied to a portable power source of a notebook computer. FIG. 3 (a) is a plan view and FIG. 3 (b) is a front view.

Specification It has an electric capacity of 120 Wh that operates for 14 h at 10.8 V-0.8 A (10.5 h at 14.4 V-0.8 A), so that a maximum output of 12 W can be obtained.

  3 (a) and 3 (b), the fuel cell system 20 is incorporated in a resin container 24 having a rectangular shape (length: 140 mm, width: 60 mm).

  The reactor 4 is accommodated in a substantially half space along the longitudinal direction in the container 24. The reactor 4 is composed of a small case manufactured by drawing aluminum or the like, and is configured as a replaceable cartridge type.

  As Al, it is preferable to use a powder having a large specific surface area as much as possible. Thereby, the reaction rate can be increased.

  Further, the surface of the Al powder can be agitated together with a minimum amount of Ga in advance to wet the surface and destroy the oxide film, thereby improving the reaction efficiency.

  A fuel cell 5 is accommodated in a state facing the reactor 4. The fuel cell 5 is composed of a set of a plurality of cells. The total mass of the fuel cell 5 is 150 g in a dry state (800 Wh / kg in terms of weight energy density) so that the entire mass is the same as that of the current standard type lithium battery. About 4 times).

  A water tank 2 is disposed below the fuel cell 5, and an inlet 2 a for injecting water is provided at one longitudinal end of the water tank 2.

  A pump 6 and a micro turbine 21 are arranged between the reactor 4 and the fuel cell 5. The pump 6 pumps water from the water tank 2 and supplies it to the reactor 4, and the micro turbine 21 is connected to the reactor 4. The hydrogen gas generated in the above is distributed and supplied to each cell of the fuel cell 5.

  In the figure, reference numeral 25 denotes an air supply pipe for supplying air serving as an oxygen source from the outside of the container 24 via the turbine 26.

  In the fuel cell system 20 having the above-described configuration, when the theoretical voltage 1.23V of the fuel cell 5 is reduced to 0.9V, Al necessary for generating the electric capacity is 90 g.

If the power density of the fuel cell 5 is 100 mW / cm ² , the solid polymer membrane area needs to be 120 cm ² .

  The pump 6 is provided as a water supply device in accordance with the theoretical equivalent shown in Table 1 for the purpose of controlling the pressure of hydrogen in the reactor 4 at a constant pressure.

  The work of the pump 6 is proportional to the recovery work of the micro turbine 21, and as a result, water proportional to the hydrogen consumption is supplied to the reactor 4.

  The fuel cell system 20 configured as described above can be used as a portable power source for a notebook computer.

3. Third Embodiment of Fuel Cell System According to the Present Invention FIG. 4 shows a third embodiment of the fuel cell system according to the present invention. In the figure, the same components as those in FIG. 2 are denoted by the same reference numerals, and the description thereof is omitted.

  In FIG. 2, the configuration in which the micro turbine 21 and the pump 6 are interlocked has been described. However, in the third embodiment of the fuel cell system 30 illustrated in FIG. 4, the generator 31 is connected to the output shaft of the micro turbine 21. A motor 32 that directly rotates the pump 6 is driven by the electric power obtained by the generator 31.

  The micro turbine 21, the generator 31, and the motor 32 function as supply control means for controlling the amount of water discharged from the pump 6 in proportion to the flow rate of hydrogen gas delivered from the reactor 4.

According to the above configuration, while the fuel cell system 30 generates 1 J of energy, the turbine 21 converts the hydrogen pressure to obtain 3.54 × 10 ⁻⁴ J work. At the same time, the pump 6 consumes 4.19 × 10 ⁻⁵ J of the work and sends water from the water tank 2 to the reactor 4.

Even if the resistance of the output shaft and the efficiency of the generator 31 are taken into consideration, if the efficiency of the entire system is 4.19 × 10 ⁻⁵ J / 3.54 × 10 ⁻⁴ J = 0.118 or more, this The fuel cell system 30 is sufficiently established.

  In the above-described embodiment, the case where the fuel cell system of the present invention is applied to a portable power source of a notebook computer has been described. However, if the scale of each part of the fuel cell system is increased, the configuration is not limited to a notebook computer, for example, indoors. It can also be used as a fuel cell for installation or a fuel cell for automobiles.

1 is a principle diagram showing a first embodiment of a fuel cell system according to the present invention. FIG. 3 is a view corresponding to FIG. 1 showing a second embodiment of the fuel cell system according to the present invention. (a) is a top view at the time of applying the fuel cell system of this invention to the portable power supply of a notebook personal computer, (b) is the front view. FIG. 3 is a view corresponding to FIG. 1 showing a third embodiment of the fuel cell system according to the present invention. It is a PQ characteristic view of the pump shown in FIG.

Explanation of symbols

1 Fuel cell system 2 Water tank
3 Water supply pipe 4 Reactor 5 Fuel cell 6 Pump 7 Check valve 8 Hydrogen supply pipe (hydrogen gas flow path)
9 Flow control valve 10 Flow meter (supply control means)
11 Inverter (supply control means)
20 Fuel Cell System 21 Micro Turbine 22, 23 Gear 24 Container 25 Air Supply Pipe 26 Turbine 30 Fuel Cell System 31 Generator 32 Motor

Claims (11)

A tank for storing water or an alkaline aqueous solution;
A reactor containing a hydrogen generating material that reacts with the water or an aqueous alkaline solution to generate hydrogen;
A pump for supplying water or alkaline aqueous solution in the tank to the reactor;
A hydrogen gas flow path for supplying hydrogen gas generated in the reactor to the fuel cell;
And a supply control means for controlling a discharge amount of water or an alkaline aqueous solution from the pump corresponding to a flow rate of the hydrogen gas sent from the reactor. Battery system.   The fuel cell system according to claim 1, wherein the hydrogen generating material includes at least one selected from the group consisting of aluminum, magnesium, silicon, zinc, and iron.   The supply control means includes a flow meter provided in the hydrogen gas flow path, and an inverter that converts a flow rate signal output from the flow meter into an alternating current proportional to the hydrogen gas flow rate. The fuel cell system according to claim 1 or 2, wherein the pump is configured to be driven by an AC motor.   The supply control means includes a flow meter provided in the hydrogen gas flow path, and a PWM control device that converts a flow signal output from the flow meter into a pulse signal proportional to the hydrogen gas flow rate. The fuel cell system according to claim 1 or 2, wherein the pump is driven by a DC motor by a PWM controller.   The supply control means includes a turbine provided in the hydrogen gas flow path, a gear provided on a rotating shaft of the turbine, and a gear provided on the rotating shaft of the pump at a predetermined gear ratio with respect to the gear. The fuel cell system according to claim 1, wherein the fuel cell system is configured to interlock the turbine and the pump.   The supply control means includes a turbine provided in the hydrogen gas flow path and a generator provided on the rotating shaft of the turbine, and is configured to drive the pump with electric power obtained by the generator. The fuel cell system according to claim 1 or 2, wherein   Water or alkaline aqueous solution is stored in a tank, a hydrogen generating substance that generates hydrogen by reacting with the water or alkaline aqueous solution is contained in the reactor, water or alkaline aqueous solution in the tank is supplied to the reactor, and Hydrogen generation generated by supplying hydrogen gas generated in a reactor to a fuel cell and controlling supply of water or an alkaline aqueous solution to the reactor in proportion to a flow rate of hydrogen gas sent out from the reactor Quantity control method.   8. The hydrogen gas flow rate is measured by a flow meter, a flow signal output from the flow meter is converted into an alternating current proportional to the hydrogen gas flow rate by an inverter, and the pump is driven by an AC motor by the inverter. The method for controlling the amount of hydrogen generation described.   The hydrogen gas flow rate is measured by a flow meter, the flow rate signal output from the flow meter is converted into a pulse signal proportional to the hydrogen gas flow rate by a PWM controller, and the pump is driven by a DC motor that is PWM controlled. The method for controlling the amount of hydrogen generation according to claim 7.   A turbine is provided in the hydrogen gas flow path, a gear provided on the rotating shaft of the turbine and a gear provided on the rotating shaft of the pump are meshed at a predetermined gear ratio, and the turbine and the pump are connected. The method for controlling the amount of hydrogen generation according to claim 7 to be interlocked.   The method for controlling the amount of hydrogen generation according to claim 7, wherein a turbine is provided in the hydrogen gas flow path, a generator is provided on a rotating shaft of the turbine, and the pump is driven by electric power obtained by the generator.

Images