JP2017108673A - Hydrogen production method and hydrogen production device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hydrogen production method and hydrogen production device which can utilize biogas for hydrogen production effectively as much as possible.SOLUTION: A hydrogen production method is used for producing hydrogen from the biogas produced by methane fermentation treatment, and includes the step S1 for storing solar heat in heat storage means and the step S2 for warming the methane fermentation means by using the heat from the heat storage means.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a hydrogen production method and a hydrogen production apparatus for producing maximum hydrogen from a fixed amount of biomass.

  In recent years, movements using hydrogen as energy have taken place in various places. As one of the methods for producing hydrogen, there is a method of producing hydrogen by a steam reforming reaction using natural gas mainly composed of methane or liquefied petroleum gas as a raw material, which is the mainstream of the current hydrogen production method. .

  As for methane as a raw material for hydrogen production, methane fermentation using sewage sludge and waste biomass has attracted attention. In recent years, there is an example in which hydrogen is produced from biogas derived from sewage sludge and a hydrogen station is constructed in a sewage treatment plant (see, for example, Non-Patent Document 1). It is planned that not only sewage sludge but also waste biomass will be methane-fermented to produce hydrogen from the resulting biogas. At this time, in order to increase the production amount of hydrogen, it is necessary to increase the amount of methane used as a raw material, that is, biogas. Originally, the purpose of methane fermentation treatment is to reduce the amount of sewage sludge and waste, so biogas produced by methane fermentation treatment is used for heating methane fermentation tanks (for example, Patent Documents 1 to 5). reference). Only surplus biogas is used for hydrogen production and other purposes. Therefore, in order to increase the production amount of hydrogen, it is considered that the biogas used for heating the methane fermentation tank may be used for hydrogen production. For that purpose, a heat source for heating the methane fermentation tank is required.

  Considering that the methane fermenter is heated other than biogas, the use of renewable energy is considered wise. In particular, it is considered to be very effective to use heat obtained from solar heat. For example, Patent Document 1 proposes a temperature control method based on temperature change management using solar heat in methane fermentation treatment for small scale livestock industries. However, when only the solar heat is used as the heating heat source of the methane fermenter, biogas is generated, but it is not stable depending on the day. Has occurred. This is because the solar heat cannot be used due to the weather, or it cannot be used as a heat source at night in winter. In consideration of producing hydrogen from biogas, it is desirable that a certain amount can be stably produced, but it is difficult to achieve this with the method described in Patent Document 1.

Ministry of Land, Infrastructure, Transport and Tourism press release, the world's first trial “Hydrogen creation technology from sewage sludge” demonstration facility started operation, [online], [October 23, 2015 search], Internet <URL: http: // www. nilim.go.jp/lab/bcg/kisya/journal/kisya20150324.pdf>

JP2012-101186A JP 2002-11447 A JP 2005-21839 A JP 2005-198618 A JP 2008-200260 A

  Therefore, in the technology for producing hydrogen from biogas produced by methane fermentation treatment, a technology capable of maximally effectively utilizing biogas for hydrogen production has been demanded in order to maximize the production amount of hydrogen.

  This invention is made | formed in view of the above, Comprising: It aims at providing the hydrogen production method and hydrogen production apparatus which can utilize biogas for hydrogen production to the maximum extent.

  In order to solve the above-described problems and achieve the object, the hydrogen production method according to the present invention is a hydrogen production method for producing hydrogen from biogas produced by methane fermentation, and stores solar heat in a heat storage means. And a step of heating the methane fermentation means using heat from the heat storage means.

  Further, another hydrogen production method according to the present invention includes a step of performing biomass power generation using a part of biogas produced by methane fermentation means in the above-described invention, and exhaust heat discharged during biomass power generation. And a step of storing heat in the heat storage means.

  Another hydrogen production method according to the present invention is characterized in that, in the above-described invention, the method further comprises a step of monitoring a temperature boundary of a stratified heat storage tank as a heat storage means and grasping a warmable time.

  Further, in the hydrogen production method according to the present invention, in the above-described invention, the amount of heat that can be stored by solar heat is predicted and predicted from the temperature boundary monitoring information and weather forecast information of the stratified heat storage tank that is the heat storage means. The method further includes the step of controlling biomass power generation based on the amount of heat.

  Moreover, the hydrogen production apparatus according to the present invention is a hydrogen production apparatus for producing hydrogen from biogas produced by methane fermentation treatment, solar heat utilization means for making solar heat available, and heat storage means for storing solar heat. And a heating means for heating the methane fermentation means using heat from the heat storage means.

  In addition, the other hydrogen production apparatus according to the present invention further includes a biomass power generation unit that performs biomass power generation using a part of biogas produced by the methane fermentation unit in the above-described invention, and the heating unit includes: The waste heat discharged at the time of biomass power generation is stored in a heat storage means.

  Further, another hydrogen production apparatus according to the present invention is characterized in that, in the above-described invention, the hydrogen production apparatus further includes a monitoring unit that monitors a temperature boundary of a stratified heat storage tank as a heat storage unit and grasps a warmable time. .

  In addition, in the above-described invention, the hydrogen production apparatus according to the present invention includes a monitoring unit that monitors a temperature boundary of a stratified heat storage tank that is a heat storage unit, and monitoring information and weather forecast information by the monitoring unit, thereby storing heat by solar heat. It further comprises control means for predicting a possible amount of heat and controlling biomass power generation based on the predicted amount of heat.

  According to the method for producing hydrogen according to the present invention, a method for producing hydrogen from biogas produced by methane fermentation treatment, the step of storing solar heat in the heat storage means, and the heat from the heat storage means are used. The process of heating the methane fermentation means, and when heating the methane fermentation means using solar heat, the heat from the heat storage means cannot be used directly to use solar heat at night or in the rain. It is also possible to warm the methane fermentation means during the period. For this reason, all the biogas produced by the methane fermentation means can be used for hydrogen production. Therefore, the biogas can be effectively used for hydrogen production to the maximum extent.

  Further, according to another hydrogen production method according to the present invention, the step of performing biomass power generation using a part of the biogas produced by the methane fermentation means, and the waste heat discharged during biomass power generation as the heat storage means And a step of storing heat, so that the methane fermentation means can be heated even when solar heat cannot be used due to the weather or the like. In addition, the electric power generated by biomass power generation can be used for an accompanying processing facility.

  Moreover, according to the other hydrogen production method which concerns on this invention, since it further has the process of monitoring the temperature boundary of the stratified type thermal storage tank which is a thermal storage means, and grasping | ascertaining warming time, the heating control of a methane fermentation means Has the effect of making it easier to perform.

  Further, in the hydrogen production method according to the present invention, in the above-described invention, the amount of heat that can be stored by solar heat is predicted and predicted from the temperature boundary monitoring information and weather forecast information of the stratified heat storage tank that is the heat storage means. Since it further includes a process for controlling biomass power generation based on the amount of heat, the amount of biogas used when using exhaust heat from biomass power generation can be controlled to a minimum, and more biogas can be secured for hydrogen production. There is an effect.

  Moreover, according to the hydrogen production apparatus according to the present invention, a hydrogen production apparatus that produces hydrogen from a biogas produced by methane fermentation treatment, solar heat utilization means that makes solar heat available, and heat storage that stores solar heat. And the heating means for heating the methane fermentation means using the heat from the heat storage means, so when the methane fermentation means is heated using solar heat, the heat from the heat storage means is used. Thus, it is possible to heat the methane fermentation means even during periods when solar heat during nighttime or rainy weather cannot be used directly. For this reason, all the biogas produced by the methane fermentation means can be used for hydrogen production. Therefore, the biogas can be effectively used for hydrogen production to the maximum extent.

  Moreover, according to the other hydrogen production apparatus according to the present invention, the apparatus further includes biomass power generation means for performing biomass power generation using a part of the biogas produced by the methane fermentation means, and the heating means is used during biomass power generation. Since the exhaust heat exhausted is stored in the heat storage means, there is an effect that the methane fermentation means can be heated even when solar heat cannot be used due to the weather or the like. In addition, the electric power generated by biomass power generation can be used for an accompanying processing facility.

  In addition, according to another hydrogen production apparatus according to the present invention, the apparatus further includes a monitoring unit that monitors a temperature boundary of a stratified heat storage tank that is a heat storage unit and grasps a warmable time. There exists an effect that control becomes easy.

  Further, according to another hydrogen production apparatus according to the present invention, the amount of heat that can be stored by solar heat from the monitoring means for monitoring the temperature boundary of the stratified heat storage tank that is the heat storage means, and the monitoring information and weather forecast information by the monitoring means And control means for controlling biomass power generation based on the predicted amount of heat, so that the amount of biogas used when using exhaust heat from biomass power generation can be controlled to a minimum, and biotechnology can be used for hydrogen production. There is an effect that more gas can be secured.

FIG. 1 is a schematic flowchart showing an embodiment of the hydrogen production method according to the present invention. FIG. 2 is a schematic configuration diagram showing Embodiment 1 of the hydrogen production apparatus according to the present invention. FIG. 3 is a schematic configuration diagram showing Embodiment 2 of the hydrogen production apparatus according to the present invention. FIG. 4 is a schematic configuration diagram showing Embodiment 3 of the hydrogen production apparatus according to the present invention.

  Embodiments of a hydrogen production method and a hydrogen production apparatus according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

[Hydrogen production method]
First, the hydrogen production method according to the present invention will be described.
As shown in FIG. 1, the hydrogen production method according to the present invention is a hydrogen production method for producing hydrogen from biogas produced by sewage sludge-derived methane fermentation treatment, and the solar heat generated by a solar heat system is stored in a heat storage tank (heat storage). Means (step S1), a process of heating the methane fermentation tank (methane fermentation means) using the heat from the heat storage tank (step S2), and biogas produced by the methane fermentation tank A step of producing hydrogen (step S3).

  According to this embodiment, when heating a methane fermentation tank using solar heat, the stored heat is used to add the methane fermentation tank even during periods when the solar heat cannot be used directly at night or in the rain. It is possible to warm. For this reason, all the biogas produced in the methane fermentation tank can be used for hydrogen production. Therefore, biogas can be utilized to the maximum extent for hydrogen production.

  Thus, according to the present embodiment, when producing hydrogen using biogas produced by methane fermentation treatment, the amount of hydrogen is stably produced, and biogas produced by methane fermentation is produced. Can be converted to the maximum amount of hydrogen.

  In the above embodiment, as shown in FIG. 1, the step of performing biomass power generation using a part of the biogas produced by the methane fermentation tank, and the waste heat discharged during the biomass power generation is stored in the heat storage tank. And you may further provide the process (step S4) of heating a methane fermentation tank using this heat storage. In this way, it is possible to heat the methane fermenter even when solar heat cannot be used due to the weather or the like. In addition, the electric power generated by biomass power generation can be used for an accompanying processing facility.

  Moreover, in said embodiment, you may further comprise the process which comprises a thermal storage tank with a stratified type thermal storage tank, and monitors the temperature boundary of this stratified type thermal storage tank, and grasps | ascertains warming time. If it does in this way, it will become easy to perform the heating control of a methane fermentation tank.

  In addition, the method may further include a step of predicting the amount of heat that can be stored by solar heat from the monitoring information of the temperature boundary of the stratified heat storage tank and the weather forecast information, and controlling biomass power generation based on the predicted amount of heat. If it does in this way, the amount of biogas used in the case of utilizing the exhaust heat from biomass power generation can be controlled to the minimum, and more biogas that can be used for hydrogen production can be secured.

[Hydrogen production equipment]
Next, the hydrogen production apparatus according to the present invention will be described.

(Embodiment 1)
First, the hydrogen production apparatus according to Embodiment 1 of the present invention will be described.
FIG. 2 is a schematic configuration diagram of the hydrogen production apparatus according to the first embodiment, and shows an example of heating of a methane fermentation tank using solar heat and a hydrogen production flow derived from biogas.

  As shown in this figure, the hydrogen production apparatus 100 according to Embodiment 1 is a hydrogen production apparatus that produces hydrogen from biogas produced by methane fermentation treatment derived from sewage sludge, and uses solar heat. Solar heat system 10 (solar heat utilization means) for heating the heat medium, heat storage tank 12 (heat storage means) for storing the heat of the heat medium, and methane fermentation tank 14 (methane fermentation means) using heat from the heat storage tank 12 The piping 16-26 with which the heat medium as a heating means which heats flows is provided. In addition, the thermal storage tank 12 and the methane fermentation tank 14 are provided with temperature measuring devices 12A and 14A, respectively, and temperature control management can be performed using these.

  Said solar thermal system 10, the thermal storage tank 12, the methane fermentation tank 14, piping 16-26 grade | etc., Functions as a heating apparatus of the methane fermentation tank 14 using a solar heat.

  The pipes 16 to 26 constitute a circuit in which the heat medium circulates. The inlet-side piping 16 supplies the heat medium heated by the solar thermal system 10 to the heat storage tank 12 via the pump 28 and the piping 18. The pipe 20 supplies the heat medium from the heat storage tank 12 to the methane fermentation tank 14, and the pipe 22 supplies the heat medium from the methane fermentation tank 14 to the heat storage tank 12. The pipe 24 supplies the heat medium from the heat storage tank 12 to the solar heat system 10 via the pump 30 and the outlet-side pipe 26. The pipe 18 is provided with a three-way valve 32. The three-way valve 32 is connected to the pipe 24 via a pipe 34, and the pipe 34 functions as a three-way valve bypass. In this piping system, an expansion valve may be used instead of the pumps 28 and 30, and the flow rate may be formed by differential pressure.

  The hydrogen production apparatus 100 includes a well-known hydrogen production facility derived from biogas. Examples of the hydrogen production equipment include a desulfurization equipment 36, a gas holder 38 for biogas, a Gaussian pressure blower 40, a siloxane removal equipment 42, a membrane separator 44, a hydrogen production equipment 46 by steam reforming, a hydrogen storage tank 48, hydrogen The transportation vehicle 50 can be used.

  According to the present embodiment, when the methane fermentation tank 14 is heated using the solar thermal system 10, heat is also stored in the heat storage tank 12, and the stored heat is used for nighttime or It is possible to heat the methane fermenter 14 even in a period in which solar heat during rainy weather cannot be used directly. For this reason, all the biogas produced in the methane fermentation tank 14 can be used for hydrogen production. Therefore, biogas can be utilized to the maximum extent for hydrogen production.

  Thus, according to the present embodiment, when producing hydrogen using biogas produced by methane fermentation treatment, the amount of hydrogen is stably produced, and biogas produced by methane fermentation is produced. Can be converted to the maximum amount of hydrogen.

(Embodiment 2)
Next, a hydrogen production apparatus according to Embodiment 2 of the present invention will be described.
FIG. 3 is a schematic configuration diagram of the hydrogen production apparatus according to the second embodiment, showing an example of a biogas-derived hydrogen production flow and heating of a methane fermentation tank using exhaust heat from solar heat and biomass power generation. Yes.

  As shown in this figure, the hydrogen production apparatus 200 according to the second embodiment includes a biomass power generation apparatus 52 (biomass power generation means) and a heat exchanger in addition to the configuration of the hydrogen production apparatus 100 according to the first embodiment. 54 and pipes 56 to 60 through which a heat medium as a heating means circulates.

  The biomass power generation device 52 performs biomass power generation (digestion gas power generation) using a part of the biogas (digestion gas) produced by the methane fermentation tank 14. As the digestion gas to be used, a part of methane refined and purified for hydrogen production by the membrane separator 44 can be used. In the present embodiment, waste heat discharged during biomass power generation by the biomass power generation device 52 is stored in the heat storage tank 12.

  The pipe 56 on the inlet side supplies the heat exchanger 54 with a heat medium heated by exhaust heat discharged when the biomass power generation device 52 generates power. The pipe 58 supplies the heat medium from the heat exchanger 54 to the biomass power generation device 52. The pipe 60 supplies the heat medium from the three-way valve 30 </ b> A to the three-way valve 28 </ b> A and the pipe 18 through the heat exchanger 54. For this reason, the exhaust heat discharged | emitted at the time of the electric power generation of the biomass power generation apparatus 52 is supplied to the piping 18 via the heat exchanger 54, is heat-stored in the thermal storage tank 12, and is utilized for the heating of the methane fermentation tank 14. FIG.

  According to the present embodiment, even when solar heat cannot be used due to weather or the like, the methane fermentation tank 14 can be heated using the exhaust heat from the biomass power generation device 52. In addition, the electric power generated by the biomass power generation device 52 can be used for processing equipment associated with the hydrogen production device 200.

(Embodiment 3)
Next, a hydrogen production apparatus according to Embodiment 3 of the present invention will be described.
FIG. 4 is a partial schematic configuration diagram of the hydrogen production apparatus according to the third embodiment, and shows an example of heating of a methane fermentation tank using solar heat and a stratified heat storage tank. The illustration of the hydrogen production facility is omitted.

  As shown in this figure, the hydrogen production apparatus 300 according to the third embodiment is configured such that the heat storage tank 12 is configured by a stratified heat storage tank 120 in the first or second embodiment. In the present embodiment, the temperature measuring device 12A provided in the stratified heat storage tank 120 functions as a monitoring means for monitoring the temperature boundary of the stratified heat storage tank 120 and grasping the warmable time. The pipe 18 at the heat source inlet is provided with a temperature measuring device 32A for measuring the temperature of the heat medium.

  When hot water is used as the heat medium, low-temperature hot water (indicated as 40 ° C. cold water in the example in the figure) is located on the lower side of the stratified heat storage tank 120 due to density differences, and hot water (in the example in the figure in the figure). 60 ° C. warm water) is stored, and the boundary becomes a temperature boundary.

  In this configuration, the temperature of the heat source inlet is raised so that the inlet temperature of the stratified heat storage tank 120 rises to, for example, 60 ° C. by adjusting the flow rate of the pipe 34 that is a three-way valve bypass. At this time, the temperature boundary of the stratified heat storage tank 120 is monitored. Since the temperature boundary has a correlation with the warmable time, it is possible to grasp the warmable time for heating the methane fermentation tank 14 on the stratified heat storage tank 120 side by monitoring the temperature boundary. Thereby, it becomes easy to perform the heating control of the methane fermentation tank 14.

  In said embodiment, it is preferable that the utilization priority of a heat source shall be (1) solar heat and (2) waste heat of biomass power generation. These heat sources are controlled not only by measuring the temperature in the methane fermentation tank 14 and the heat storage tank 12 (or the stratified heat storage tank 120) but also by taking into account weather information (for example, weather forecasts) up to several days ahead. It is desirable to perform control. In this case, for example, the amount of heat that can be stored by solar heat is predicted from the monitoring information of the temperature boundary of the stratified heat storage tank 120 and the weather forecast information up to several days ahead, and the biomass power generation is turned on / off based on the predicted amount of heat. You may further provide the control means to control. By doing in this way, when using the exhaust heat of biomass power generation, it becomes minimum biogas utilization and can secure more biogas which can be used for hydrogen production.

  As a place where the solar heat system 10 is installed, for example, when hydrogen is produced from sewage sludge, a sufficient amount of solar heat can be secured by using an idle land of a sewage treatment plant.

  As described above, according to the present embodiment, when hydrogen is produced using biomass-derived methane, the heating of the methane fermentation tank 14 is prioritized in the order of solar heat, heat storage, and exhaust heat of biomass power generation. By using it, the amount of biogas required for heating the methane fermentation tank 14 can be reduced. Thereby, biogas can be utilized to the maximum and the amount of hydrogen production can be increased. In addition, by not controlling the heating of the methane fermentation tank 14 only by the solar heat system 10 and the heat storage tank 12, heating is possible even when natural energy cannot be used, and the temperature of the methane fermentation tank 14 is not affected by the weather. Can be maintained at an appropriate temperature. That is, it is possible to obtain quantitatively stable biogas.

  In addition, in said embodiment, although the case where it applied to the methane fermentation process derived from a sewage sludge was demonstrated, this invention is not restricted to a sewage sludge, The methane fermentation process and hydrogen production using another waste material The same applies to equipment.

  As described above, according to the hydrogen production method according to the present invention, a hydrogen production method for producing hydrogen from biogas produced by methane fermentation treatment, the step of storing solar heat in the heat storage means, and the heat storage means The process of heating the methane fermentation means using the heat from the sun, so when heating the methane fermentation means using solar heat, the heat from the heat storage means is used at night or in the rain It is possible to heat the methane fermentation means even during periods when the solar heat is not directly available. For this reason, all the biogas produced by the methane fermentation means can be used for hydrogen production. Therefore, biogas can be utilized to the maximum extent for hydrogen production.

  Further, according to another hydrogen production method according to the present invention, the step of performing biomass power generation using a part of the biogas produced by the methane fermentation means, and the waste heat discharged during biomass power generation as the heat storage means And the step of storing heat, the methane fermentation means can be heated even when the solar heat cannot be used due to the weather or the like. In addition, the electric power generated by biomass power generation can be used for an accompanying processing facility.

  Moreover, according to the other hydrogen production method which concerns on this invention, since it further has the process of monitoring the temperature boundary of the stratified type thermal storage tank which is a thermal storage means, and grasping | ascertaining warming time, the heating control of a methane fermentation means Is easier to do.

  Further, in the hydrogen production method according to the present invention, in the above-described invention, the amount of heat that can be stored by solar heat is predicted and predicted from the temperature boundary monitoring information and weather forecast information of the stratified heat storage tank that is the heat storage means. Since the process of controlling biomass power generation based on the amount of heat is further provided, the amount of biogas used when using exhaust heat from biomass power generation can be controlled to a minimum, and more biogas that can be used for hydrogen production can be secured.

  Moreover, according to the hydrogen production apparatus according to the present invention, a hydrogen production apparatus that produces hydrogen from a biogas produced by methane fermentation treatment, solar heat utilization means that makes solar heat available, and heat storage that stores solar heat. And the heating means for heating the methane fermentation means using the heat from the heat storage means, so when the methane fermentation means is heated using solar heat, the heat from the heat storage means is used. Thus, it is possible to heat the methane fermentation means even during periods when solar heat during nighttime or rainy weather cannot be used directly. For this reason, all the biogas produced by the methane fermentation means can be used for hydrogen production. Therefore, biogas can be utilized to the maximum extent for hydrogen production.

  Moreover, according to the other hydrogen production apparatus according to the present invention, the apparatus further includes biomass power generation means for performing biomass power generation using a part of the biogas produced by the methane fermentation means, and the heating means is used during biomass power generation. Since the exhaust heat exhausted is stored in the heat storage means, it is possible to heat the methane fermentation means even when solar heat cannot be used due to the weather or the like. In addition, the electric power generated by biomass power generation can be used for an accompanying processing facility.

  In addition, according to another hydrogen production apparatus according to the present invention, the apparatus further includes a monitoring unit that monitors a temperature boundary of a stratified heat storage tank that is a heat storage unit and grasps a warmable time. It becomes easier to control.

  Further, according to another hydrogen production apparatus according to the present invention, the amount of heat that can be stored by solar heat from the monitoring means for monitoring the temperature boundary of the stratified heat storage tank that is the heat storage means, and the monitoring information and weather forecast information by the monitoring means And control means for controlling biomass power generation based on the predicted amount of heat, so that the amount of biogas used when using exhaust heat from biomass power generation can be controlled to a minimum, and biotechnology can be used for hydrogen production. More gas can be secured.

  As described above, the hydrogen production method and the hydrogen production apparatus according to the present invention are useful for producing hydrogen from biogas produced by methane fermentation treatment, and in particular, the biogas is most effectively used for hydrogen production. Suitable for doing.

10 Solar thermal system (solar heat utilization means)
12 Heat storage layer (heat storage means)
12A, 14A, 32A Temperature measuring device 14 Methane fermentation tank (methane fermentation means)
16, 18, 20, 22, 24, 26, 34, 56, 58, 60 Piping (heating means)
28, 30 Pump 28A, 30A, 32 Three-way valve 36 Desulfurization equipment 38 Gas holder 40 Gas pressurization blower 42 Siloxane removal equipment 44 Membrane separation equipment 46 Hydrogen production equipment 48 Hydrogen storage tank 50 Hydrogen transport vehicle 52 Biomass power generation equipment (biomass power generation means)
54 Heat exchanger 100, 200, 300 Hydrogen production device 120 Stratified heat storage tank (heat storage means)

Claims (8)

A hydrogen production method for producing hydrogen from biogas produced by methane fermentation treatment,
Storing solar heat in the heat storage means;
And a step of heating the methane fermentation means using heat from the heat storage means.   2. The method according to claim 1, further comprising a step of performing biomass power generation using a part of biogas produced by the methane fermentation means, and a step of storing heat exhaustion heat discharged during biomass power generation in the heat storage means. The method for producing hydrogen according to 1.   The method for producing hydrogen according to claim 1, further comprising a step of monitoring a temperature boundary of a stratified heat storage tank which is a heat storage means and grasping a warmable time.   It further comprises the step of predicting the amount of heat that can be stored by solar heat from the monitoring information of the temperature boundary of the stratified heat storage tank that is a heat storage means and the weather forecast information, and controlling biomass power generation based on the predicted amount of heat The hydrogen production method according to claim 2. A hydrogen production apparatus for producing hydrogen from biogas produced by methane fermentation treatment,
Solar heat utilization means for making solar heat available;
A heat storage means for storing solar heat;
A hydrogen production apparatus comprising: a heating means for heating the methane fermentation means using heat from the heat storage means.   It further comprises biomass power generation means for performing biomass power generation using a part of biogas produced by methane fermentation means, and the heating means stores the exhaust heat discharged during biomass power generation in the heat storage means. The hydrogen production apparatus according to claim 5.   The hydrogen production apparatus according to claim 5 or 6, further comprising monitoring means for monitoring a temperature boundary of a stratified heat storage tank which is a heat storage means and grasping a warmable time.   Predict the amount of heat that can be stored by solar heat from the monitoring means that monitors the temperature boundary of the stratified heat storage tank, which is the heat storage means, and the monitoring information and weather forecast information from the monitoring means, and control biomass power generation based on the predicted heat quantity The hydrogen production apparatus according to claim 6, further comprising a control unit.

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