KR102922819B1 - System and Method for producing hydrogen based on composite energy - Google Patents

Abstract

A hybrid energy-based hydrogen production system that produces hydrogen using solar thermal and solar composite energy is provided. The hybrid energy-based hydrogen production system is characterized by including a hybrid energy block that collects solar energy to generate hot water or electricity, a hydrogen production block that produces hydrogen using the generated hot water, and an electricity supply block that stores or supplies the generated electricity.

Description

System and Method for Producing Hydrogen Based on Composite Energy

The present invention relates to a hydrogen production technology, and more specifically, to a system and method for efficiently producing hydrogen by maximizing solar energy by increasing the temperature of an electrolyte using heat produced from a solar thermal collector and electrolyzing water using electricity produced from a solar module.

Today, due to the global oil price surge and/or climate change, concerns about energy supply stability and environmental issues are increasing, and research and development on alternative energy sources are actively being conducted to address these issues.

Among various alternative energy sources, hydrogen energy, a sustainable and environmentally friendly energy source, has recently been attracting significant attention. Hydrogen energy is an environmentally friendly energy source that produces only water as a byproduct when burned. It can be used to generate heat and electricity through generators and fuel cells.

Traditionally, hydrogen has been produced by reforming fossil fuels, but recent efforts are shifting to electrolysis, which does not produce _CO2 during the production process. However, hydrogen production using electrolysis has the disadvantage of being expensive.

There are several factors that determine the unit cost of hydrogen production, including electricity prices, energy efficiency, facility operating hours, and production volume. Therefore, lowering the unit cost of hydrogen production requires methods such as using cheaper electricity, improving energy efficiency, and expanding facilities.

The integration of electrolysis facilities with renewable energy sources has been a significant area of research and development, particularly with solar power, which is the most advanced and widely deployed energy source. Linking electrolysis facilities to solar power generation allows for a seamless connection with electricity demand, thereby enhancing the stability of the power supply.

As the price of solar power generation modules has decreased and installation costs have decreased, solar power generation has become commercialized and is being widely used in both residential and commercial power generation facilities.

However, solar power modules generate heat during the electricity generation process, increasing their temperature. This causes their power generation efficiency to remain limited. Excessive temperature rises in solar cells can affect their performance and durability, reducing their power conversion efficiency.

In addition to solar power generation, solar thermal technology also exists. Solar thermal technology absorbs solar radiation to produce hot water, utilizing heat rather than light. Like solar energy, solar thermal technology also suffers from the disadvantage of overheating when exposed to sunlight for extended periods, leading to internal damage and malfunction.

Against this backdrop, solar thermal and solar power generation devices that utilize both solar energy and solar heat simultaneously to complement each other's shortcomings are being developed and used.

The following patent document 1 (“Republic of Korea Patent No. 10-1331623 (Registration date: November 14, 2013)” describes the structure of a solar thermal photovoltaic composite device in which a solar module is positioned above a solar thermal collector. The solar module is characterized in that it moves horizontally along a rail by the operation of a separate power device to expose or block a portion of the solar thermal collector to the sun.

The following patent document 2 (“Republic of Korea Patent No. 10-2088791 (Registration Date: March 9, 2020)”) describes the structure of a solar thermal photovoltaic composite device that deploys a shield made of thin-film solar cells on the surface of a solar thermal storage device. The shield is characterized in that it is rolled or deployed into a cylindrical shape by the operation of a separate power device to expose or block a portion of the thermal storage device to the sun.

The following patent document 3 (“Republic of Korea Patent No. 10-2088791 (Registration Date: March 9, 2020)”) describes a hydrogen generation device using solar heat and solar energy. The hydrogen generation device includes a solar light collection module and a solar heat collection module installed separately, and receives electricity through solar energy and dissociates hydrogen from coolant through solar heat. The hydrogen generation device separates hydrogen by applying heat to a mixture of water and hydrogen after electrolysis.

Therefore, a method of utilizing heat by heating water and supplying it to an electrolytic cell is required.

1. Republic of Korea Patent No. 10-1331623 (Registration date: November 14, 2013) 2. Republic of Korea Patent No. 10-2088791 (Registration date: March 9, 2020) 3. Republic of Korea Patent No. 10-2088791 (Registration date: March 9, 2020)

The present invention has been proposed to solve the problems according to the above background technology, and its purpose is to provide a hybrid energy-based hydrogen production system and method that produces hydrogen by utilizing solar thermal and solar photovoltaic composite energy.

In addition, another purpose of the present invention is to provide a hybrid energy-based hydrogen production system and method capable of producing hydrogen with high energy efficiency by utilizing solar energy to produce electricity and solar heat to use the heat exchange function in an electrolysis facility.

In order to achieve the task presented above, the present invention provides a hybrid energy-based hydrogen production system that produces hydrogen by utilizing solar thermal and solar photovoltaic composite energy.

The above complex energy-based hydrogen production system is,

A composite energy block that collects solar energy to generate hot water or electricity;

A hydrogen generation block that produces hydrogen using the generated hot water; and

It is characterized by including an electric supply block that stores or supplies the generated electricity.

In addition, the composite energy block is characterized by including a solar collector that collects sunlight among the solar energy to generate electricity; a solar heat collector that collects and stores solar heat among the solar energy to generate hot water; and a first heat storage tank that stores the generated hot water.

In addition, the composite energy block is characterized by including a first water level sensor for measuring the hot water level of the first storage tank; and a first temperature sensor for measuring the hot water temperature of the first storage tank.

Additionally, the first storage tank is characterized in that a coil is installed inside for additional heating.

In addition, the area exposed to the sun by the solar collector and the solar thermal collector can be dynamically changed according to the amount of energy required for each driving condition.

In addition, the hydrogen generation block is characterized by including an electrolytic cell that generates oxygen (O ₂ ) and hydrogen (H ₂ ) from the hot water; a first gas-liquid separator that separates water and oxygen; a second gas-liquid separator that separates water and hydrogen; and a hydrogen storage tank that stores the generated hydrogen.

In addition, the water separated from the gas in the first and second gas-liquid separators is characterized in that it is recovered to the first storage tank by operation of the gas-liquid separator water recovery control valve.

In addition, the system is characterized by including a hydrogen fuel cell that generates electricity using the produced hydrogen and supplies the generated electricity to an electricity supply block.

In addition, the electrolytic cell is characterized by being a PEM (Polymer Electrolyte Membrane) water electrolysis-based electrolytic cell.

In addition, the hydrogen generation block is characterized by including a hydrogen purifier that purifies the separated hydrogen; and a dryer that controls moisture in the purified hydrogen to generate pure hydrogen.

In addition, the hydrogen generation block is characterized by including a flame arrestor that discharges separated oxygen into the atmosphere.

In addition, the system is characterized by including a heat storage block that stores heat energy when the hydrogen generation block is not operating or the solar collector of the composite energy block receives more heat energy than necessary.

In addition, it is characterized by including a water circulation supply block that circulates and supplies hot water to the complex energy block or transmits the heat energy to the heat storage block.

In addition, the water circulation supply block is characterized by including a boiler hot water control valve for introducing hot water into the complex energy block; a hot water line control valve for controlling a hot water line; a circulation pump for circulating and pumping hot water; and an electrolytic tank water supply control valve for supplying hot water to the electrolytic tank; and a first storage tank control valve for controlling the amount of hot water flowing into or out of the first storage tank.

In addition, the heat storage block is characterized by including: a second heat storage tank for storing the heat energy; a second temperature sensor for measuring the temperature of hot water stored in the second heat storage tank; a second water level sensor for checking the water level of the hot water stored in the second heat storage tank; and a second heat storage tank drain valve for draining hot water stored in the second heat storage tank to the outside when it is necessary to maintain the temperature of the hot water or for other purposes.

In addition, the system is characterized by including a water supply block that supplies water or auxiliary heats hot water.

In addition, the auxiliary water supply block is characterized by including a boiler that is used for hot water or heating supply and supplies hot water to the complex energy block.

In addition, the system is characterized by including a water purifier that supplies water from which impurities and ions have been removed to the complex energy block.

In addition, the power supply block is characterized by including a battery that stores electricity generated in the complex energy block or electricity generated by the hydrogen fuel cell (140); a DC/DC (Direct Current/Direct Current) power converter that converts the stored electricity into DC power and supplies it to the electrolyzer; and a DC/AC (Direct Current/Alternating Current) power converter that converts the stored electricity into AC power and supplies it to the outside.

On the other hand, another embodiment of the present invention provides a method for producing hydrogen based on composite energy, characterized in that it comprises: (a) a step in which a composite energy block collects solar energy to produce hot water or electricity; (b) a step in which a hydrogen production block produces hydrogen using the produced hot water; and (c) a step in which an electricity supply block stores or supplies the produced electricity.

According to the present invention, hydrogen can be produced efficiently by maximizing solar energy.

In addition, another effect of the present invention is that the electricity required for hydrogen production is used from solar power generation, thereby reducing the cost of purchasing electricity, and the heat energy required for facility operation is used from solar heat, thereby reducing energy costs and facility operation costs, and thus lower hydrogen production costs can be expected than with existing methods, making it economically effective.

In addition, another effect of the present invention is that when the supply of electricity or heat exceeds the required amount during the daytime when there is a lot of sunlight, the electric energy is stored in a battery and the heat energy is stored in a thermal storage tank, thereby supplementing the insufficient electricity and heat during the time when there is little sunlight, thereby producing hydrogen.

In addition, another effect of the present invention is that it is connected to the power grid and heating and hot water supply network in a home or building, so that when the hydrogen production facility is not in operation, the electric energy stored in the battery can be supplied to a place where power demand is needed, and the thermal energy stored in the storage tank can be used for heating and hot water supply, so that it has universality.

In addition, another effect of the present invention is that, in conjunction with a fuel cell for power generation in a home or building, the produced hydrogen can be fed into the fuel cell to additionally produce and supply electricity when necessary.

FIG. 1 is a conceptual diagram of a composite energy-based hydrogen production system according to one embodiment of the present invention.
Figure 2 is a flowchart showing a process of utilizing electric energy and thermal energy according to one embodiment of the present invention.
Figure 3 is a flowchart showing a process of producing hydrogen using solar energy according to one embodiment of the present invention.
Figure 4 is a graph showing the relationship between typical cell voltage and current density.
Figure 5 is a graph showing the relationship between typical activation overvoltage and current density.
Figure 6 is a graph showing the relationship between typical ohmic overvoltage and current density.

The present invention is susceptible to various modifications and embodiments. Specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, but rather to encompass all modifications, equivalents, and alternatives falling within the spirit and technical scope of the present invention.

When describing each drawing, similar reference numerals are used for similar components.

The terms "first," "second," etc. may be used to describe various components, but these components should not be limited by these terms. These terms are used solely to distinguish one component from another.

For example, without departing from the scope of the present invention, a first component could be referred to as a second component, and similarly, a second component could also be referred to as a first component. The term "and/or" includes any combination of a plurality of related listed items or any one of a plurality of related listed items.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs.

Terms defined in commonly used dictionaries should be interpreted to have a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an idealized or overly formal sense unless expressly defined in this application.

Hereinafter, a composite energy-based hydrogen production system and method according to an embodiment of the present invention will be described in detail with reference to the attached drawings.

FIG. 1 is a conceptual diagram of a complex energy-based hydrogen production system (100) according to an embodiment of the present invention. Referring to FIG. 1, the complex energy-based hydrogen production system (100) may be configured to include a complex energy block (110) that collects solar energy to generate hot water or electricity, a hydrogen production block (120) that produces hydrogen using hot water, a water supply block (130) that auxiliary heats the hot water, a hydrogen fuel cell (140) that generates electricity using the produced hydrogen, an electricity supply block (150) that stores or supplies the generated electricity, a water circulation supply block (160) that circulates and supplies water to the complex energy block (110), a heat storage block (170) that stores heat, etc.

The composite energy block (110) may be configured to include a solar collector (112) that collects sunlight to generate electricity, a solar thermal collector (113) that collects and stores solar heat to generate hot water, a first thermal storage tank (114) that stores the generated hot water, a first water level sensor (115) that measures the hot water level of the first thermal storage tank (114), a first temperature sensor (116) that measures the hot water temperature of the first thermal storage tank (114), etc. Of course, it may include a gas-liquid separator water recovery control valve (117) that recovers water from the hydrogen generation block (120).

The solar collector (113) may include a solar module (not shown) that converts sunlight into electricity. The solar module (not shown) includes a solar cell that converts light into electrical energy.

The solar collector (112) and/or solar thermal collector (113) can dynamically change the area exposed to the sun according to the amount of energy required for each system operating condition. The solar collector is located above the solar thermal collector, so that by reducing the area of the solar collector directly exposed to the sun, the area of the solar thermal collector exposed to the sun increases.

Flat panels can adjust the area of the solar collector exposed to the sun by sliding at a certain angle in the up-down or left-right direction, and thin-film panels can adjust the area of the solar collector exposed to the sun by folding or rolling.

At this time, each method can adjust the area of the solar collector by manipulating the gear. The energy required for system operation can be preliminarily analyzed and power generation status can be monitored. When power supply is required, the solar collector area can be exposed as much as possible. When power is oversupplied or the thermal energy required for heat exchange is insufficient, the exposed area of the solar collector area can be reduced and the exposed area of the solar thermal collector area can be increased, allowing flexible operation according to energy demand and supply.

The first storage tank (114) is equipped with a first water level sensor (115) so that water is supplied when the stored water falls below a certain level. In addition, the first temperature sensor (116) is equipped so that the temperature of the hot water stored in the first storage tank (114) is measured, and if the hot water temperature does not reach the set temperature, it is additionally heated through a coil equipped in the first storage tank (114). The water heated by solar heat is circulated through the operation of the circulation pump (168) of the water circulation pump (160) and the operation of the first storage tank control valve (167).

Hot water stored in the first storage tank (114) can be supplied to the hydrogen generation block (120) by operating the electrolytic cell water supply control valve (169) for hydrogen production.

The hydrogen generation block (120) may be configured to include an electrolytic cell (123) that generates oxygen (O ₂ ) and hydrogen (H ₂ ) from hot water, a first gas-liquid separator (124) that separates water and oxygen, a second gas-liquid separator (126) that separates water and hydrogen, a hydrogen purifier (128) that purifies hydrogen, a dryer (129) that controls moisture in purified hydrogen to generate high-purity pure hydrogen, and a hydrogen storage tank (122) that stores the generated hydrogen.

The electrolytic cell (123) of the hydrogen generation block (120) electrolyzes the supplied hot water using electricity stored in the battery (151) to produce oxygen (O ₂ ) and hydrogen (H ₂ ).

At this time, the supplied power is converted to match the operating voltage range of the electrolyzer (123) through a DC/DC power converter (152-1). The electrolyzer (123) may be a PEM water electrolysis-based electrolyzer.

In the case of alkaline water electrolysis based on a strong basic electrolyte, there are problems with corrosion of equipment and pipes and it cannot be used for hot water and heating, so the electrolytic cell (123) is based on PEM (Polymer Electrolyte Membrane) water electrolysis based on pure water.

The oxygen gas produced in the electrolytic cell (123) is transferred to the first gas-liquid separator (124) and separated from water, and the separated oxygen gas is discharged into the atmosphere through the flame arrestor (125). Meanwhile, the hydrogen gas produced in the electrolytic cell (123) is transferred to the second gas-liquid separator (126) and separated from water, and the separated oxygen gas is passed through the hydrogen purifier (128) and the dryer (129) to increase its purity. In other words, it becomes pure hydrogen gas.

The water separated from the gas in each gas-liquid separator (124, 126) is recovered to the first storage tank (114) by operation of the gas-liquid separator water recovery control valve (117). The purified hydrogen gas is stored in the hydrogen storage tank (122).

The stored hydrogen gas can be fed into a hydrogen fuel cell (140) to produce additional electricity during times when solar power generation is insufficient, and the produced electricity can be stored in a battery (10) through a DC/DC power converter (11).

The generated electricity can be transmitted to the demand source via a DC/AC (Direct Current/Alternating Current) power converter (152-2) when needed. Additionally, the stored hydrogen gas can be transported and utilized when needed.

The power supply block (150) stores electricity generated from the composite energy block (110) or stores electricity generated by the hydrogen fuel cell (140) in a battery (151), and converts it into DC power or AC power using a DC/DC (Direct Current/Direct Current) power converter (152-1) and/or a DC/AC (Direct Current/Alternating Current) power converter (152-2) and supplies it.

The battery (151) is composed of battery cells (not shown) arranged in series and/or in parallel, and the battery cells may be high-voltage battery cells such as nickel metal battery cells, lithium ion battery cells, lithium polymer battery cells, lithium sulfur battery cells, sodium sulfur battery cells, and all-solid-state battery cells. In general, a high-voltage battery is a battery used as a power source for moving electric vehicles, etc., and refers to a high voltage of 100 V or higher. However, the present invention is not limited thereto, and low-voltage batteries are also possible.

The DC/DC (Direct Current/Direct Current) power converter (152-1) performs the function of supplying power to the electrolyzer (123) and/or the hydrogen fuel cell (140) through step-up or step-down.

The water circulation supply block (160) performs the function of circulating and supplying water to the composite energy block (110). To this end, the water circulation supply block (160) may be configured to include a boiler hot water control valve (161) that introduces hot water produced in the water supply block (130) into the composite energy block (110), a first hot water line control valve (163) for controlling the hot water line, a second hot water line control valve (164) for controlling the hot water line, a circulation pump (168) for circulating and pumping hot water, an electrolytic cell water supply control valve (169) for supplying hot water to the electrolytic cell, and a first storage tank control valve (167) for controlling the amount of hot water flowing into or out of the first storage tank (114).

When the hydrogen generation block (120) is not operating or the solar collector (113) of the composite energy block (110) receives more heat energy than necessary, the heat energy can be stored in the heat storage block (170). Hot water can be transferred to the heat storage block (170) through the first hot water line control valve (163). The supplied hot water is transferred to the second heat storage tank (171) through the second heat storage tank hot water control valve (176) and stored there.

The second storage tank (171) is equipped with a second water level sensor (179), and when the stored water falls below a certain level, water is supplied through the operation of the second storage tank low-temperature water control valve (177). In addition, a second temperature sensor (178) is equipped, and the temperature of the hot water stored in the second storage tank (171) is measured. When it is necessary to maintain the temperature of the water stored in the second storage tank (171) or for other purposes, the water can be drained to the outside through the second storage tank drain valve (175).

An auxiliary water supply block (130) is configured to supply water or auxiliary heat hot water. Water used within the entire system is introduced from the outside by operating a water supply control valve (181). In addition, the introduced water passes through a water purifier (180) to remove impurities and/or ions, and is then transferred into the system by operating a water purifier control valve (136).

The auxiliary water supply block (130) performs the function of auxiliary heating of recovered hot water after external supply or heating for use in hot water or heating supply. To this end, the water supply block (130) may be configured to include a boiler (138), a heater (132), various valves (131, 133, 134, 135, 136, 137, 139), etc.

After external supply or heating, the recovered hot water can be transferred to the boiler (138) by the low-temperature water supply control valve (137) and heated auxiliary.

The boiler (138) can be used to control the temperature of hot water to a certain level or to supply hot water or heating during winter or at night when there is little sunlight. It can also be used to prevent pipes from freezing during winter. At this time, water is supplied to the boiler (138) by operating the low-temperature water supply control valve (137), and the hot water produced in the boiler (138) is transferred into the system by operating the boiler hot water control valve (139).

A heater (132) is a device that generates heat by supplying energy, and the part is a heating or heat energy-requiring part of a home/building to which hot water is supplied rather than the heater itself.

A heater water supply control valve (135) is installed at the front end of the heater (132), and a heater water discharge control valve (131) is installed at the rear end.

Figure 2 is a flowchart illustrating a process for utilizing electrical energy and thermal energy according to one embodiment of the present invention. Referring to Figure 2, hot water is produced using solar heat as solar heat is collected (steps S210 and S220).

Afterwards, as heat is collected by the solar collector (113), the accumulated hot water is stored in the first storage tank (114) to supply hot water or perform heating (steps S221, S223, S225). Of course, after heating, the water is recovered and used to produce hot water (step S227).

Meanwhile, as hot water is produced, electrolysis is performed in the hydrogen generation block (120) to separate oxygen, hydrogen, and gaseous liquid and release oxygen (steps S230, S240, S250).

Figure 3 is a flowchart illustrating a process for producing hydrogen using solar energy according to one embodiment of the present invention. Referring to Figure 3, solar energy is collected in a solar collector (112) of a composite energy block (110) (step S310).

The solar collector (112) produces electricity by collecting solar light and stores it in the electricity supply block (150) (step S320).

The power supply block (150) supplies electricity to the outside (step S321).

Of course, the electric supply block (150) also supplies electricity to the electrolytic cell (123) of the hydrogen generation block (120), thereby executing electrolysis (step S330).

Oxygen and hydrogen are generated by electrolysis, and oxygen, hydrogen, and gas/liquid are separated (step S340).

Afterwards, hydrogen is purified and dried to store pure hydrogen (steps S350, S360, S370).

Afterwards, electricity is produced by utilizing hydrogen in a hydrogen fuel cell (140) (steps S380, S311).

Figure 4 is a graph showing the relationship between typical cell voltage and current density. Typically, in water electrolysis, when voltage is applied to an electrode immersed in water, an electrochemical reaction occurs between the electrode interface and the water.

Theoretically, water decomposition begins at approximately 1.23 V, but in practice, it occurs at voltages higher than 1.23 V. This is due to overpotential and various resistances, and research is ongoing in the field of water electrolysis to further reduce these values.

As shown in Figure 4, it can be confirmed that the current density increases as the water temperature increases at the same voltage. This is because the overvoltage and resistance decrease as the water temperature increases. Figures 5 and 6 illustrate this.

Figure 5 is a graph showing the relationship between a typical activation overvoltage and current density, and Figure 6 is a graph showing the relationship between a typical ohmic overvoltage and current density. Referring to Figures 5 and 6, it can be seen that the overvoltage and resistance decrease as the water temperature increases.

This phenomenon is the same in alkaline electrolysis, PEM electrolysis, and all other electrolysis methods. That is, the more current flows through the same area, the more hydrogen is generated.

100: Hybrid Energy-Based Hydrogen Production System
110: Composite Energy Block
112: Solar collector 113: Solar thermal collector
114: First storage tank 115: First water level sensor
116: Second temperature sensor
120: Hydrogen Generation Block
122: Hydrogen storage tank 123: Electrolyzer
124: First gas-liquid separator 126: Second gas-liquid separator
130: Auxiliary water supply block
132: Heater 138: Boiler
140: Hydrogen fuel cell
150: Power supply block
151: Battery
152-1: DC/DC (Direct Current/Direct Current) Power Converter
152-2: DC/AC (Direct Current/Alternating Current) Power Converter
160: Water circulation supply block
161: Boiler hot water control valve
163,164: First and second hot water line control valves
167: First storage tank control valve
168: Circulation pump 169: Electrolyzer water supply control valve
170: Heat storage block
171: Second storage tank 175: Second storage tank drain valve
180: Water purifier

Claims (19)

◈Claim 1 was waived upon payment of the registration fee.◈ A composite energy block (110) that collects solar energy to generate hot water or electricity;
A hydrogen generation block (120) that produces hydrogen using the generated hot water; and
It includes an electric supply block (150) that stores or supplies the generated electricity;
The above complex energy block (110) is
A solar collector (112) that collects sunlight from the above solar energy to generate electricity;
A solar collector (113) that collects and stores solar heat from the above solar energy to generate hot water; and
It includes a first storage tank (114) for storing the generated hot water;
A composite energy-based hydrogen production system characterized in that the first storage tank (114) has a coil installed inside for additional heating, and the solar collector (112) and the solar heat collector (113) dynamically change the area exposed to the sun according to the amount of energy required for each operating condition.
delete ◈Claim 3 was waived upon payment of the registration fee.◈ In the first paragraph,
The above complex energy block (110) is
A first water level sensor (115) for measuring the hot water level of the first storage tank (114); and
A composite energy-based hydrogen production system, characterized by including a first temperature sensor (116) for measuring the temperature of hot water in the first storage tank (114).
delete ◈Claim 5 was waived upon payment of the registration fee.◈ In the first paragraph,
The above hydrogen generation block (120) is
An electrolytic cell (123) that produces oxygen (O ₂ ) and hydrogen (H ₂ ) from the above hot water;
A first gas-liquid separator (124) that separates water and oxygen;
A second gas-liquid separator (126) for separating water and hydrogen; and
A composite energy-based hydrogen production system characterized by including a hydrogen storage tank (122) for storing the generated hydrogen.
◈Claim 6 was waived upon payment of the registration fee.◈ In paragraph 5,
A composite energy-based hydrogen production system, characterized in that the water separated from the gas in the first and second gas-liquid separators (124, 126) is recovered to the first storage tank (114) by operation of the gas-liquid separator water recovery control valve (117).
◈Claim 7 was waived upon payment of the registration fee.◈ In paragraph 5,
A composite energy-based hydrogen production system characterized by including a hydrogen fuel cell (140) that generates electricity using the produced hydrogen and supplies the generated electricity to an electricity supply block (150).
◈Claim 8 was waived upon payment of the registration fee.◈ In paragraph 5,
A composite energy-based hydrogen production system characterized in that the above electrolytic cell (123) is a PEM (Polymer Electrolyte Membrane) water electrolysis-based electrolytic cell.
◈Claim 9 was waived upon payment of the registration fee.◈ In paragraph 5,
The above hydrogen generation block (120) is
A hydrogen purifier (128) for purifying the separated hydrogen; and
A composite energy-based hydrogen production system characterized by including a dryer (129) for controlling moisture in the purified hydrogen to produce pure hydrogen.
◈Claim 10 was waived upon payment of the registration fee.◈ In paragraph 5,
A composite energy-based hydrogen production system characterized by including a flame arrestor (125) that discharges separated oxygen into the atmosphere.
◈Claim 11 was waived upon payment of the registration fee.◈ In paragraph 5,
A composite energy-based hydrogen production system characterized by including a heat storage block (170) that stores heat energy when the hydrogen generation block (120) is not in operation or when the solar heat collector (113) of the composite energy block (110) receives more heat energy than necessary.
◈Claim 12 was waived upon payment of the registration fee.◈ In paragraph 11,
A complex energy-based hydrogen production system characterized by including a water circulation supply block (160) that circulates and supplies hot water to the complex energy block (110) or transmits the heat energy to the heat storage block (170).
◈Claim 13 was waived upon payment of the registration fee.◈ In paragraph 12,
The above water circulation supply block (160) is
A boiler hot water control valve (161) that introduces hot water into the above-mentioned complex energy block (110);
Hot water line control valve (163,164) for hot water line control;
A circulation pump (168) for circulating hot water; and
An electrolytic cell water supply control valve (169) that supplies hot water to the electrolytic cell (123); and
A composite energy-based hydrogen production system, characterized by including a first storage tank control valve (167) that controls the amount of hot water flowing into or out of the first storage tank (114).
◈Claim 14 was waived upon payment of the registration fee.◈ In paragraph 12,
The above heat storage block (170) is
A second storage tank (171) for storing the above thermal energy;
A second temperature sensor (178) that measures the temperature of hot water stored in the second storage tank (171);
A second water level sensor (179) that checks the water level of the stored hot water in the second storage tank (171); and
A composite energy-based hydrogen production system characterized by including a second storage tank drain valve (175) for draining hot water stored in the second storage tank (171) to the outside when it is necessary to maintain the temperature or for other purposes.
◈Claim 15 was waived upon payment of the registration fee.◈ In the first paragraph,
A composite energy-based hydrogen production system characterized by including a water supply block (130) for supplying water or auxiliary heating of hot water.
◈Claim 16 was waived upon payment of the registration fee.◈ In paragraph 15,
The above auxiliary water supply block (130) is
A complex energy-based hydrogen production system, characterized in that it comprises a boiler (138) for supplying hot water or heating and supplying hot water to the complex energy block (110).
◈Claim 17 was waived upon payment of the registration fee.◈ In the first paragraph,
A complex energy-based hydrogen production system characterized by including a water purifier (180) that supplies water from which impurities and ions have been removed to the complex energy block (110).
◈Claim 18 was waived upon payment of the registration fee.◈ In paragraph 7,
The above electric supply block (150) is
A battery (151) that stores electricity generated from the above complex energy block (110) or electricity generated by the above hydrogen fuel cell (140);
A DC/DC (Direct Current/Direct Current) power converter (152-1) that converts stored electricity into DC power and supplies it to the electrolytic cell (123); and
A composite energy-based hydrogen production system characterized by including a DC/AC (Direct Current/Alternating Current) power converter (152-2) that converts stored electricity into AC power and supplies it to the outside.
(a) A step in which a composite energy block (110) collects solar energy to generate hot water or electricity;
(b) a step of producing hydrogen using the hot water generated by the hydrogen generation block (120); and
(c) a step of storing or supplying the generated electricity by the electric supply block (150);
The above complex energy block (110) is
A solar collector (112) that collects sunlight from the above solar energy to generate electricity;
A solar collector (113) that collects and stores solar heat from the above solar energy to generate hot water; and
It includes a first storage tank (114) for storing the generated hot water;
A composite energy-based hydrogen production method characterized in that the first storage tank (114) has a coil installed inside for additional heating, and the solar collector (112) and the solar heat collector (113) dynamically change the area exposed to the sun according to the amount of energy required for each operating condition.