CN115796487A - Hydrogen production economy management method for hydrogen production system with multiple electrolytic cells - Google Patents
Hydrogen production economy management method for hydrogen production system with multiple electrolytic cells Download PDFInfo
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Abstract
The invention discloses a hydrogen production economy management method for a hydrogen production system with multiple electrolytic cells, which relates to the field of hydrogen production and comprises the following steps: s1: establishing a hydrogen leveling cost model, and establishing a hydrogen leveling cost model comprehensively considering purchase cost and electric power cost; s2: inputting parameters, and dynamically inputting various parameters into the hydrogen leveling cost model, wherein the unit price of electric power is manually or automatically input along with the market unit price; s3: calculating hydrogen leveling cost, calculating hydrogen leveling cost under the working conditions of different numbers of electrolytic cells, and finding out the operating number of the electrolytic cells with the lowest hydrogen leveling cost; s4: operating according to the requirement, and operating the corresponding number of the electrolytic cells according to the calculation result. The method can effectively realize that the efficiency of the water electrolysis hydrogen production system is dynamically adjusted according to the needs on the premise of keeping the hydrogen production power unchanged, thereby adjusting the hydrogen production economy.
Description
Technical Field
The invention relates to the field of hydrogen production, in particular to an economic management method for hydrogen production of a hydrogen production system with multiple electrolytic cells.
Background
The hydrogen energy is a clean energy, the hydrogen production by electrolyzing pure water is a high-efficiency clean hydrogen production mode, the conversion process is clean and pollution-free, and the raw material only contains water, so that the device is an ideal hydrogen energy supply device. The electrolytic tank, the direct current power supply, the water treatment supply device, the hydrogen treatment device and the oxygen treatment device are combined to form a set of system for producing hydrogen by electrolyzing pure water. Compared with an alkali liquor electrolysis hydrogen production system, the electrolysis raw material is pure water, alkali liquor does not need to be added into water to improve the conductivity, and pollution is avoided. Compared with the traditional coal hydrogen production and natural gas hydrogen production, the method has the advantage that carbon emission and other pollution can not be generated.
The most important economic index for examining the water electrolysis hydrogen production system is hydrogen leveling cost, namely total cost of the whole service life of the hydrogen production system, and the cost of each kilogram of hydrogen obtained by the total hydrogen production amount of the whole service life is evenly shared, namely:
hydrogen leveling cost = total life cost/total hydrogen production (1)
The total life cost is composed of system purchase cost, operation and maintenance cost and electric power cost, and the total life cost comprises the following steps:
hydrogen leveling cost = (system purchase cost + operation and maintenance cost + power cost)/total hydrogen production in whole life
Hydrogen leveling cost = system leveling cost + operation and maintenance leveling cost + power leveling cost (2)
For example, a 1000-square/hour hydrogen production system works for 8 hours and 10 years every day, and the total hydrogen production amount is 2920 ten thousand square hydrogen which is equivalent to 2625080 kg. The total cost of the whole life is 5000 yuan for purchasing the hydrogen production system, 1000 yuan for 10 years of operation and maintenance, 1.46 yuan for 10 years of consumed power, the total cost is 2.06 yuan, and the hydrogen leveling cost is 7.05 yuan/kg per degree divided by 2625080 kg of the total hydrogen production amount of the whole life. Among the leveling costs, the largest one is the system procurement cost and the power cost. Where the electricity costs are related to the efficiency of the hydrogen production system, the electricity costs. If the efficiency of the system can be dynamically adjusted under the condition that the output hydrogen quantity is not changed in the working process of the hydrogen production system, the economic management of the hydrogen production system can be realized.
Generally, the greater the electrical power, the greater the operating current, and the higher the operating voltage for a particular electrolytic hydrogen production system. The electrolysis hydrogen production system has the characteristics that the higher the hydrogen production working voltage is, the lower the electrical efficiency is; the working voltage and the electric efficiency are in one-to-one correspondence. Therefore, when the hydrogen production power of the hydrogen production system is changed, the hydrogen production efficiency is changed, and the hydrogen production efficiency cannot be independently adjusted. For a water electrolysis hydrogen production system consisting of a plurality of electrolysis baths, the power-efficiency characteristics of the water electrolysis hydrogen production system are the same as those of a single electrolysis bath hydrogen production system, and the problem that the efficiency cannot be adjusted is also faced. Efficiency cannot be adjusted, so economic management is not mentioned. Therefore, it is necessary to develop an economic management method for hydrogen production of a multi-electrolytic cell hydrogen production system to solve the above problems.
Disclosure of Invention
The invention aims to provide a hydrogen production economic management method for a hydrogen production system with multiple electrolytic cells, which can control the number of the working electrolytic cells through a switch, and reduce the efficiency if the number of the working electrolytic cells is reduced under the same hydrogen production power requirement; the method can effectively realize that the efficiency of the water electrolysis hydrogen production system is dynamically adjusted according to the requirement on the premise of keeping the hydrogen production power unchanged, thereby adjusting the hydrogen production economy.
In order to achieve the purpose, the invention provides the following technical scheme: a hydrogen production economy management method for a hydrogen production system with multiple electrolytic cells comprises the following steps:
s1: establishing a hydrogen leveling cost model, and establishing a hydrogen leveling cost model comprehensively considering purchase cost and electric power cost;
s2: inputting parameters, and dynamically inputting various parameters into the hydrogen leveling cost model, wherein the unit price of electric power is manually or automatically input along with the market unit price;
s3: calculating hydrogen leveling cost, calculating hydrogen leveling cost under the working conditions of different numbers of electrolytic cells, and finding out the operating number of the electrolytic cells with the lowest hydrogen leveling cost;
s4: operating according to the requirement, and operating the corresponding electrolytic cell quantity according to the calculation result.
Preferably, the hydrogen leveling cost model in the S1 is applied to hydrogen energy storage systems of photovoltaic power stations, wind power stations and water power stations.
Preferably, the electrolysis module in the water electrolysis hydrogen production system consists of a plurality of sets of electrolysis baths.
Preferably, the hydrogen leveling cost = total life cost/total life hydrogen production amount.
Preferably, the total life cost includes system purchase cost, operation and maintenance cost and electric power cost.
Preferably, the hydrogen leveling cost = a system leveling cost + an operation and maintenance leveling cost + an electric power leveling cost.
The invention has the technical effects and advantages that:
1. the economic management method can effectively realize that the efficiency is dynamically adjusted as required on the premise that the hydrogen production power of the water electrolysis hydrogen production system is not changed, the efficiency and the unit price of electric power jointly influence the electric power cost of each kilogram of hydrogen, and the operation method with the lowest comprehensive cost can be calculated by combining other parts of the hydrogen cost in the economic model of the management method, so that the hydrogen production benefit is maximized;
2. the number of the working electrolytic cells can be controlled through the switch, and under the same hydrogen production power requirement, if the number of the working electrolytic cells is reduced, the efficiency is reduced, and the number of the working electrolytic cells is increased, the efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of an electrolytic water hydrogen production apparatus and an economic management method thereof according to the present invention.
FIG. 2 is a diagram showing the relationship between hydrogen production amount and efficiency of the hydrogen production system by electrolyzing water according to the present invention.
FIG. 3 is a flow diagram of a hydrogen production economy management method for a hydrogen production system according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The invention provides a hydrogen production economic management method for a hydrogen production system with multiple electrolytic cells, which comprises the following steps of:
s1: establishing a hydrogen leveling cost model, and establishing a hydrogen leveling cost model comprehensively considering purchase cost and electric power cost;
s2: inputting parameters, dynamically inputting various parameters into the hydrogen leveling cost model, wherein the unit price of the electric power is manually or automatically input along with the unit price of the market;
s3: calculating hydrogen leveling cost, calculating hydrogen leveling cost under the working conditions of different numbers of electrolytic cells, and finding out the operating number of the electrolytic cells with the lowest hydrogen leveling cost;
s4: operating according to the requirement, and operating the corresponding number of the electrolytic cells according to the calculation result.
The hydrogen energy storage system is applied to a hydrogen energy storage system of a photovoltaic power station, a wind power station and a water power station, is provided with a 1000Nm & lt 3 & gt/h water electrolysis hydrogen production system, and has a design life of 10 years and 28000 hours. The electrolytic module comprises 4 sets of electrolytic tanks, the purchase cost of the electrolytic module is 5000 ten thousand of the system, 3500 ten thousand of four electrolytic tanks and 1500 ten thousand of other auxiliary facilities. When the electric power output of each electric pile is 100%, the electric pile works at the working point 2 of the figure 2, and the efficiency is 80%; the electrical power output at 50% is operating at operating point 2 of fig. 2 with an electrical efficiency of 72%.
And establishing an economic model according to the method provided by the invention, and inputting the parameters into the economic model.
The economic management method can effectively realize the dynamic adjustment of the efficiency as required on the premise that the hydrogen production power of the water electrolysis hydrogen production system is not changed. Efficiency and electricity unit price together affect the cost of electricity per kilogram of hydrogen. And (3) calculating the operation method with the lowest comprehensive cost by combining other parts of the hydrogen cost in the economic model of the management method, and realizing the maximization of the hydrogen production benefit.
When the hydrogen demand is 500Nm/h, there are two modes: in the mode 1, 4 electrolytic cells are operated, and the efficiency is 80 percent; and in the mode 2, 2 electrolytic cells are operated, the hydrogen production demand can be met, and the efficiency is 72 percent at the moment.
Different electricity prices are input into the economic model, and the operation strategy of the lowest hydrogen preparation cost is also different:
when the unit price of the electric power is 0.12 yuan/kWh, the mode 1 hydrogen leveling cost is 7.05 yuan/kg, the mode 2 leveling hydrogen cost is 7.01/kg, and the mode 2 economy is stronger.
When the hydrogen unit price is 0.2 yuan/kWh, the mode 1 electricity cost of 10.37 yuan/kg and the mode 2 electricity cost of 10.71 yuan/kg are obtained, and the mode 1 economy is stronger.
Obviously, the number of electrolytic cells that are optimally operated varies at different electricity prices. The economic management method of the system comprehensively considers the purchase cost and the electric power cost, so the economic management method can effectively obtain the lowest hydrogen production cost and the highest economic benefit according to the working modes of different market electric power price management systems.
The following references:
the most important economic index for examining the water electrolysis hydrogen production system is hydrogen leveling cost, namely total cost of the whole service life of the hydrogen production system, and the cost of each kilogram of hydrogen obtained by the total hydrogen production amount of the whole service life is evenly shared, namely:
hydrogen leveling cost = total cost per total hydrogen production (1)
The total life cost is composed of system purchase cost, operation and maintenance cost and electric power cost, and the total life cost comprises the following steps:
hydrogen leveling cost = (system purchase cost + operation and maintenance cost + power cost)/total hydrogen production in whole life
Hydrogen leveling cost = system leveling cost + operation and maintenance leveling cost + electric power leveling cost (2)
For example, a 1000-square/hour hydrogen production system works for 8 hours and 10 years every day, and the total hydrogen production amount is 2920 ten thousand square hydrogen which is equivalent to 2625080 kg. The total cost of the whole life is 5000 yuan for purchasing the hydrogen production system, 1000 yuan for 10 years of operation and maintenance, 1.46 yuan for 10 years of consumed power, the total cost is 2.06 yuan, and the hydrogen leveling cost is 7.05 yuan/kg per degree divided by 2625080 kg of the total hydrogen production amount of the whole life. Among the leveling costs, the largest one is the system procurement cost and the power cost. Where the electricity costs are related to the efficiency of the hydrogen production system, the electricity costs. If the efficiency of the system can be dynamically adjusted under the condition that the output hydrogen quantity is not changed in the working process of the hydrogen production system, the economic management of the hydrogen production system can be realized.
Claims (6)
1. A hydrogen production economy management method for a hydrogen production system with multiple electrolytic cells is characterized by comprising the following steps:
s1: establishing a hydrogen leveling cost model, and establishing a hydrogen leveling cost model comprehensively considering purchase cost and electric power cost;
s2: inputting parameters, and dynamically inputting various parameters into the hydrogen leveling cost model, wherein the unit price of electric power is manually or automatically input along with the market unit price;
s3: calculating hydrogen leveling cost, calculating hydrogen leveling cost under the working conditions of different numbers of electrolytic cells, and finding out the operating number of the electrolytic cells with the lowest hydrogen leveling cost;
s4: operating according to the requirement, and operating the corresponding electrolytic cell quantity according to the calculation result.
2. The hydrogen production economy management method for a multi-electrolytic cell hydrogen production system according to claim 1, characterized in that: the hydrogen leveling cost model in the S1 is applied to hydrogen energy storage systems of photovoltaic power stations, wind power stations and water power stations.
3. The hydrogen production economy management method for a multi-electrolytic cell hydrogen production system according to claim 2, characterized in that: the electrolytic module in the water electrolysis hydrogen production system consists of a plurality of sets of electrolytic tanks.
4. The hydrogen production economy management method for a multi-electrolytic cell hydrogen production system according to claim 1, characterized in that: the hydrogen leveling cost = total life cost/total life hydrogen production.
5. The hydrogen production economy management method for a multi-electrolytic cell hydrogen production system according to claim 4, characterized in that: the total life cost comprises system purchasing cost, operation and maintenance cost and electric power cost.
6. The hydrogen production economy management method for a multi-electrolytic cell hydrogen production system according to claim 1, characterized in that: the hydrogen leveling cost = system leveling cost + operation and maintenance leveling cost + power leveling cost.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023205139A1 (en) * | 2022-04-18 | 2023-10-26 | Ohmium International, Inc. | System and method for efficiently generating hydrogen using multiple available power sources |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023205139A1 (en) * | 2022-04-18 | 2023-10-26 | Ohmium International, Inc. | System and method for efficiently generating hydrogen using multiple available power sources |
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